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International Journal of Advanced Technology & Engineering Research (IJATER)


INTELLIGENT TRAFFIC LIGHT AND DENSITY CONTROL
    USING IR SENSORS AND MICROCONTROLLER
                              First A. Ms Promila Sinhmar, Rawal Institute of Engineering And Technology
                                          Zakopur, Faridabad- E-mail: promila.sinhmar@gmail.



Abstract                                                               Introduction
   Nowadays congestion in traffic is a serious issue. The                 Traffic research has the goal to optimize traffic flow of
traffic congestion can also be caused by large Red light de-           people and goods. As the number of road users constantly
lays, etc. The delay of respective light is hard coded in the          increases, and resources provided by current infrastructures
traffic light and it is not dependent on traffic. Therefore for        are limited, intelligent control of traffic will become a very
simulating and optimizing traffic control to better accommo-           important issue in the future. However, some limitations to
date this increasing demand is arises. In this paper we stu-           the usage of intelligent traffic control exist. Avoiding traffic
died the optimization of traffic light controller in a City us-        jams for example is thought to be beneficial to both envi-
ing microcontroller. Thus I propose multiple traffic light             ronment and economy, but improved traffic-flow may also
control and monitoring system. The system tries to reduce              lead to an increase in demand. There are several models for
possibilities of traffic jams, caused by traffic lights, to an         traffic simulation. In our research we focus on optimization
extent. The system is based on microcontroller. The micro-             of traffic light controller in a city using IR sensor and devel-
controller used in the system is 89V51RD2 which is MCS-                oped visual monitoring using microcontroller 89V51RD2.
51 family based. The system contains IR transmitter and IR
receiver which are mounted on the either sides of roads re-               Traffic light optimization is a complex problem. Even for
spectively. The IR system gets activated whenever any ve-              single junctions there might be no obvious optimal solution.
hicle passes on road between IR transmitter and IR receiver.           With multiple junctions, the problem becomes even more
Microcontroller controls the IR system and counts number               complex, as the state of one light influences the flow of traf-
of vehicles passing on road. Microcontroller also store ve-            fic towards many other lights. Another complication is the
hicles count in its memory. Based on different vehicles                fact that flow of traffic constantly changes, depending on the
count, the microcontroller takes decision and updates the              time of day, the day of the week, and the time of year.
traffic light delays as a result. The traffic light is situated at a   Roadwork and accidents further influence complexity and
certain distance from the IR system. Thus based on vehicle             performance. In this paper, we propose two approaches, the
count, microcontroller defines different ranges for traffic            first approach - to take data/input/image from object/ sub-
light delays and updates those accordingly.                            ject/vehicle and in the second approach - to process the input
                                                                       data by Computer and Microcontroller and finally display it
   The system records vehicle count in its memory at user              on the traffic light signal to control the Closed Loop System.
predefined recording interval on real time basis. This record-
ed vehicle count data can be used in future to analyze traffic
condition at respective traffic lights connected to the system.
                                                                       Modeling Circuit
For appropriate analysis, the recorded data can be down-
loaded to the computer through communication between                      In this section, we focus on the use of IR sensor and wire-
microcontroller and the computer. Administrator sitting on             less N/W in traffic control. A lot of ground can be gained in
computer can command system (microcontroller) to down-                 this area, and intelligent traffic control gained interest of
load recorded data, update light delays, erase memory, etc.            several governments and commercial companies. ITS re-
Thus administrator on a central station computer can access            search includes in-car safety systems, simulating effects of
traffic conditions on any approachable traffic lights and              infrastructural changes, route planning, optimization of
nearby roads to reduce traffic congestions to an extent. In            transport, and smart infrastructures. Its main goals are: im-
future this system can be used to inform people about differ-          proving safety, minimizing travel time, and increasing the
ent places traffic condition.                                          capacity of infrastructures. Such improvements are benefi-
Keywords— IR (infrared )sensor, Image processing, Micro-               cial to health, economy, and the environment, and this shows
controller, Digital Display.                                           in the allocated budget for ITS.




ISSN NO: 2250-3536                                VOLUME 2, ISSUE 2, MARCH 2012                                           30
International Journal of Advanced Technology & Engineering Research (IJATER)


                                                                           Figure 3 Circuit Diagram of Power Supply
                                                                    The complete circuitry is operated with TTL logic level of
                                                                 0-5V.. It comprise of 0V to 9V transformer to step down the
                                                                 220V AC supply to 9V AC. Further a bridge rectifier con-
                                                                 verts the 9V into 9V√2 DC. It is further filtered through a
                                                                 1000uF capacitor and then regulated using 7805 to get +5V.
                                                                 To isolate the output voltage of +5V from noise further fil-
                                                                 tering 220uF capacitor is done.

                                                                 Circuit Diagram

          Figure 1 Traffic system for multiple road.




              Figure 2 Block Diagram of system
                                                                       Figure 4 Circuit diagram of microcontroller board
Design and development of the sys-                                 The circuit shown in the Figure 4 is complete circuit dia-
                                                                 gram of intelligent traffic light control and monitoring sys-
tem                                                              tem which shows the interfacing of some peripherals and ICs
                                                                 with the microcontroller P89V51RD2. This circuit is made
   Development of the complete intelligent traffic light con-
                                                                 in the software Proteus, which is basically a circuit making
trol and monitoring system includes lots of study and im-        and simulation window bade software. Microcontroller rece-
plementation work. The implementation work of the com-           ives the 11.0592MHz from the crystal oscillator at XTAL1
plete data logger is divided into points discussed below.        and XTAL2 pin. Reset switch connected at pin 9 of micro-
                                                                 controller provide manual reset of the microcontroller. Pull-
Power Supply:          As per the power requirement of the       up network resistances of 10K are provide at each port to
hardware of the intelligent traffic light control and monitor-   properly differentiate between high and low TTL signal.
ing system, supply of +5V w.r.t GND is developed as shown        LCD connected with its three control signal RS (Resister
in Figure 3.                                                     Select), R/W (Read/Write) and E (Enable) is used to display
                                                                 the outputs and status messages for the user. Port P0 is used
                                                                 to provide data to LCD to display as character. RV1 potenti-
                                                                 ometer controls the contrast of LCD.

                                                                    The intelligent traffic light control and monitoring system
                                                                 stores the recorded sample into its flash memory through its
                                                                 feature of In-Application programming. Data is stored with
                                                                 the real time and data stamp with it. This real time and date
                                                                 is provided by the user.


ISSN NO: 2250-3536                            VOLUME 2, ISSUE 2, MARCH 2012                                       31
International Journal of Advanced Technology & Engineering Research (IJATER)


   Microcontroller transfers the recorded data to the comput-
er by serial communication through MAX232. This data is
                                                                 Development of Software of Intelli-
used for traffic monitoring by the user sitting on the comput-   gent Traffic Light Control and Moni-
er. To interface the UART and PC RS32 all the nine outputs
are connected through MAX232 IC for the signal conver-           toring System
sion. Whole data transfer protocol is implemented through        Assembler:
software discussed later in this chapter. Software in visual       Assembler is used to convert the assembly language code
basic on computer end collects all recorded data. Three push     to machine code. A51 assembler is used for this purpose.
button switches for UP, DOWN and ENTER are interfaced            Figure 6 shows the A51 assembler GUI.
to microcontroller at respective pins of port P2. These
switches are used for accept some numeric inputs from user
for proper function of software of the system.




         Figure 5 Circuit Diagram of Sensor on road

   Figure 5 shows circuit diagram of IR transmitter and IR
sensor situated on road. The system made here monitor and
control the traffic movement for two roads respectively.
Connector J1 and J2 of microcontroller board connects the
IR sensor on road with the microcontroller board. Pin P1.0
from port P1 drives the IR transmitter by generating 38KHZ
50% duty cycle square wave. The IR sensor output is con-
nected to pin P3.2 and P3.3 for both traffic light respective-
ly. P1.0 control the IR LED D1 through Darlington pair
formed by transistor Q1 and Q2. The Darlington pair just
amplifies the current through IR LED. The IR sensor
TSOP1738 detects the IR wave from IR LED and provides
active low output at its pin3. SO whenever any vehicle
passes through IR LED and IR sensor, the TSOP1738 pro-
vide high output at its pin3.

  This obstacle in light is detected by the microcontroller.
Signal from IR sensor is amplified by Q3 transistor.



                                                                                 Figure 6 : Assembler GUI


ISSN NO: 2250-3536                           VOLUME 2, ISSUE 2, MARCH 2012                                    32
International Journal of Advanced Technology & Engineering Research (IJATER)


                                                                 passes between IR transmitter and IR sensor, microcontroller
In-System Programmer:                                            detects and increase number of vehicle count in a recording
  P89V51RD2 microcontroller has the feature of In-System         interval for particular traffic light. Traffic light is placed
programming. Due to this it do not require any separate          ahead of IR sensor at a distance so that decision taken by
hardware programmer to get program. It includes an inbuilt       microcontroller to control traffic light can help in reducing
boot program, which helps it in programming, erasing and         the congestion at traffic light.
in-application programming. The object code formed by the           On the basis vehicle count microcontroller decide the traf-
assembler or cross compiler is loaded into the software          fic light delays for next recording interval. Traffic light de-
called IN-System programmer. Figure 7 shows a Flash mag-         lays are classified as LOW, MEDIUM, HIGH range. Thee
ic in system programmer. This window based programmer            ranges are predefined by varying vehicle count.
communicates with the microcontroller boot program
through serial port.                                                Microcontroller display shown in figure 8 shows its opera-
                                                                 tion.




                                                                   Figure 8: Microcontroller display at time of system running

                                                                   The L1 and L2 indicate the traffic light whose output user
                                                                 at system want to view. Next character current light acti-
                                                                 vated on traffic light. Next time in seconds indicate elapses
                                                                 time for current light. Next three characters show current
                                                                 mode of traffic light delay. This mode depends on the pre-
                                                                 vious vehicle count calculated in predefined recording inter-
                                                                 val.
            Figure 7 In-system Programmer GUI                      Second lie of display start with display running time of the
                                                                 system. Next is shown the vehicle count counted by the mi-
Computer Software:                                               crocontroller form IR sensor for respective traffic light. This
   The computer software for recorded data monitoring and        count is for current recording time. After completion of re-
system control is made in visual basic. The flowchart of the     coding interval, this count value is saved in flash memory
VB program is given below. Data transfer is initiated from       for further analysis.
computer through a user click in Visual Basic, which in turn
requests the microcontroller serially. The microcontroller          The microcontroller is connected to computer through a
during its main loop continuously pools the serial port, as      serial communication cable. Through the cable user sitting
shown in flow chart. Microcontroller after getting the data      on the computer as traffic administrator can command the
transfer request from PC suspends its recording task tempo-      microcontroller system to send the recorded data for moni-
rarily and switches to data transfer mode. 9600 baud rate is     toring. For the basis of data of traffic at respective load,
used in the communication. Serial port communication pa-         where sensor is situated, can update the timings of traffic
rameters are initially configured for 9600 baud rate, 8 bit      light delays with an updating command to microcontroller.
data word, no parity, and 1 stop bit.                            Administrator can also send command microcontroller to
.                                                                erase pervious recorded data after analysis. Below figure 9
                                                                 shows the graphical user interface for administrator.
Results
   Results include the successful operation of the intelligent
traffic light control and monitoring system. The IR sensor
with IR transmitter is placed at a gap. Gap acting as a proto-
type indicating a road. The system is placed near road as a
stand alone device. Whenever any obstacle like vehicle



ISSN NO: 2250-3536                           VOLUME 2, ISSUE 2, MARCH 2012                                         33
International Journal of Advanced Technology & Engineering Research (IJATER)




             Figure 9 GUI of computer software




                                                                Figure 11 Capture data from microcontroller on computer
                                                                screen

                                                                   On basis of analysis administrator can command the mi-
                                                                crocontroller of update the configuration of parameter to
                                                                respective lights. The graphical user interface to update con-
                                                                figuration is shown in figure 12




           Figure 10 Communication port selection

  To initiate the serial communication administrator has to
configure the Communication port as shown in figure 10.
Whenever administrator command microcontroller to send
recorded data, the microcontroller send al data, as vehicle
count recorded on basis of recording interval, to computer.
The microcontroller also sends s the running configuration
of parameters (Vehicle range values, delays, recording inter-
val) on traffic light. The data can be saved on the computer
as a excel file. The real time data for analysis is shown on
computer as shown in figure 11.                                   .
                                                                          Figure 12 Configuration GUI on computer


                                                                Conclusions and Future Scope
                                                                   In this paper we have studied the optimization of traffic
                                                                light controller in a City using IR sensors and microcontrol-
                                                                ler .Figure2 shows the basic block diagram of the system and
                                                                figure-4. shows the complete circuit diagram of microcon-
                                                                troller board. By using this system configuration we tries to


ISSN NO: 2250-3536                          VOLUME 2, ISSUE 2, MARCH 2012                                        34
International Journal of Advanced Technology & Engineering Research (IJATER)


reduce the possibilities of traffic jams, caused by traffic              & Tell. Eng. Department, 41070 Veziroglu
lights, to an extent and we have successfully gets the results.          Yerleskesi, Izmit-Kocaeli, Turkey
No. of passing vehicle in the fixed time slot on the road de-     [7]    Cihan Karakuzu. “Fuzzy logic based smart traffic
cide the density range of traffics and on the basis of vehicle           light simulator design and hardware implementation”.
count microcontroller decide the traffic light delays for next           Kocaeli University, Engineering Faculty, Electronics
recording interval as shown in figure 8 and figure 12 .The               & Tell. Eng. Department, 41070 Veziroglu
recorded data can be downloaded to the computer through                  Yerleskesi, Izmit-Kocaeli, Turkey
communication between microcontroller and the computer
                                                                  [8]    Kok, Khiang Tan and Marzuki. “Intelligent Traffic
and this is shown in Figure11. The Administrator sitting on
                                                                         Lights Control by Fuzzy Logic”. Malaysian Journal
computer can command system (microcontroller) to down-
                                                                         of Computer Science
load recorded data, update light delays, erase memory, etc.
Thus administrator on a central station computer can access       [9]    István Varga. “Design of an Intelligent Traffic-
traffic conditions on any approachable traffic lights and                Control System”. Balázs Kulcsár, István Varga,
nearby roads to reduce traffic congestions to an extent.                 SZTAKI, Hungary
                                                                  [10]   A (Mildly) Intelligent Traffic Light System (a Blues-
   In future this system can be used to inform people about              pec tutorial)
different places traffic condition. data transfer between the     [11]   “Automatic Traffic Control System”. SMEU Astana
microcontroller and computer can also be done through tele-              Solutions Automatic Traffic Control System.htm
phone network , data call activated SIM This technique
allows the operator to gather the recorded data from a far        [12]   P89V51RD2 specification sheet. “Microcontroller
                                                                         with 64K Bytes Flash Memory”. [Online] Available
end to his home computer without going there. Traffic lights
can be increased to N number and traffic light control can be             www.philips/devices/microcontroller.com
done for whole city by sitting on a single place.                 [13]   Multiple Traffic Control Using Wireless Sensor and
                                                                         Density Measuring Camera Amrita Rai and Govind
Reference                                                                Singh Patel. Sensors & Transducers Journal
                                                                         Vol. 94, Issue 7, July 2008, pp. 126-132

[1]    Ramón Martínez “Smart control system for LEDs
       traffic-lights based on PLC”. Dpt. de Señales, Sis-
                                                                  Biography
       temas y Radiocomunicaciones. Universidad Po-
       litécnica de Madrid ETSI de Telecommunica-
       tion.Ciudad Universitia s/n.28040 Madrid SPAIN
[2].   Bechrakis D. A., Sparis P. D.” A flexible data logging
       device for wind potential measurements and statistic-
       al magnitudes”. Democritus university of Thrace, de-
       partment of electrical and computer engineering, me-
       chanical engineering laboratory, xanthi, 67 100,           PROMILA SINHMAR is presently working as Assistant
       Greece                                                     Proffessor in Rawal Institute of Engg. and Technology, Fa-
[3]    Muhammad Ridwan. „Development of a Low Cost                ridabad. After receiving the degree of B.Tech in the field of
       Smart Traffic Controller System”. Department of Me-        Electronics and Communication from P.D.M. College of
       chanical and Materials Engineering Faculty of Engi-        Engg. and Tech., Bahadurgarh, she completed her M.Tech.
       neering and Built Environment Universiti Kebang-           from Y.M.C.A.I.E.T, Faridabad in the same field. Earlier she
       saan Malaysia, 43600 Bangi Selangor, Malaysia              has worked as assistantproff. In M.V.N. education society,
                                                                  Palwal: Ms. Promila may be reached at promi-
[4]    Marco Wiering. “Intelligent Traffic Light Control”.
                                                                  la.sinhmar@gmail.com.
       Institute of information and computing sciences,
       utrecht university
[5]    W. Wen & C. L. Yang. “A dynamic and automatic
       traffic light control system for solving the road con-
       gestion problem”.
[6]    Cihan Karakuzu. “Fuzzy logic based smart traffic
       light simulator design and hardware implementation”.
       Kocaeli University, Engineering Faculty, Electronics


ISSN NO: 2250-3536                            VOLUME 2, ISSUE 2, MARCH 2012                                       35

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Ijater 03 06

  • 1. International Journal of Advanced Technology & Engineering Research (IJATER) INTELLIGENT TRAFFIC LIGHT AND DENSITY CONTROL USING IR SENSORS AND MICROCONTROLLER First A. Ms Promila Sinhmar, Rawal Institute of Engineering And Technology Zakopur, Faridabad- E-mail: promila.sinhmar@gmail. Abstract Introduction Nowadays congestion in traffic is a serious issue. The Traffic research has the goal to optimize traffic flow of traffic congestion can also be caused by large Red light de- people and goods. As the number of road users constantly lays, etc. The delay of respective light is hard coded in the increases, and resources provided by current infrastructures traffic light and it is not dependent on traffic. Therefore for are limited, intelligent control of traffic will become a very simulating and optimizing traffic control to better accommo- important issue in the future. However, some limitations to date this increasing demand is arises. In this paper we stu- the usage of intelligent traffic control exist. Avoiding traffic died the optimization of traffic light controller in a City us- jams for example is thought to be beneficial to both envi- ing microcontroller. Thus I propose multiple traffic light ronment and economy, but improved traffic-flow may also control and monitoring system. The system tries to reduce lead to an increase in demand. There are several models for possibilities of traffic jams, caused by traffic lights, to an traffic simulation. In our research we focus on optimization extent. The system is based on microcontroller. The micro- of traffic light controller in a city using IR sensor and devel- controller used in the system is 89V51RD2 which is MCS- oped visual monitoring using microcontroller 89V51RD2. 51 family based. The system contains IR transmitter and IR receiver which are mounted on the either sides of roads re- Traffic light optimization is a complex problem. Even for spectively. The IR system gets activated whenever any ve- single junctions there might be no obvious optimal solution. hicle passes on road between IR transmitter and IR receiver. With multiple junctions, the problem becomes even more Microcontroller controls the IR system and counts number complex, as the state of one light influences the flow of traf- of vehicles passing on road. Microcontroller also store ve- fic towards many other lights. Another complication is the hicles count in its memory. Based on different vehicles fact that flow of traffic constantly changes, depending on the count, the microcontroller takes decision and updates the time of day, the day of the week, and the time of year. traffic light delays as a result. The traffic light is situated at a Roadwork and accidents further influence complexity and certain distance from the IR system. Thus based on vehicle performance. In this paper, we propose two approaches, the count, microcontroller defines different ranges for traffic first approach - to take data/input/image from object/ sub- light delays and updates those accordingly. ject/vehicle and in the second approach - to process the input data by Computer and Microcontroller and finally display it The system records vehicle count in its memory at user on the traffic light signal to control the Closed Loop System. predefined recording interval on real time basis. This record- ed vehicle count data can be used in future to analyze traffic condition at respective traffic lights connected to the system. Modeling Circuit For appropriate analysis, the recorded data can be down- loaded to the computer through communication between In this section, we focus on the use of IR sensor and wire- microcontroller and the computer. Administrator sitting on less N/W in traffic control. A lot of ground can be gained in computer can command system (microcontroller) to down- this area, and intelligent traffic control gained interest of load recorded data, update light delays, erase memory, etc. several governments and commercial companies. ITS re- Thus administrator on a central station computer can access search includes in-car safety systems, simulating effects of traffic conditions on any approachable traffic lights and infrastructural changes, route planning, optimization of nearby roads to reduce traffic congestions to an extent. In transport, and smart infrastructures. Its main goals are: im- future this system can be used to inform people about differ- proving safety, minimizing travel time, and increasing the ent places traffic condition. capacity of infrastructures. Such improvements are benefi- Keywords— IR (infrared )sensor, Image processing, Micro- cial to health, economy, and the environment, and this shows controller, Digital Display. in the allocated budget for ITS. ISSN NO: 2250-3536 VOLUME 2, ISSUE 2, MARCH 2012 30
  • 2. International Journal of Advanced Technology & Engineering Research (IJATER) Figure 3 Circuit Diagram of Power Supply The complete circuitry is operated with TTL logic level of 0-5V.. It comprise of 0V to 9V transformer to step down the 220V AC supply to 9V AC. Further a bridge rectifier con- verts the 9V into 9V√2 DC. It is further filtered through a 1000uF capacitor and then regulated using 7805 to get +5V. To isolate the output voltage of +5V from noise further fil- tering 220uF capacitor is done. Circuit Diagram Figure 1 Traffic system for multiple road. Figure 2 Block Diagram of system Figure 4 Circuit diagram of microcontroller board Design and development of the sys- The circuit shown in the Figure 4 is complete circuit dia- gram of intelligent traffic light control and monitoring sys- tem tem which shows the interfacing of some peripherals and ICs with the microcontroller P89V51RD2. This circuit is made Development of the complete intelligent traffic light con- in the software Proteus, which is basically a circuit making trol and monitoring system includes lots of study and im- and simulation window bade software. Microcontroller rece- plementation work. The implementation work of the com- ives the 11.0592MHz from the crystal oscillator at XTAL1 plete data logger is divided into points discussed below. and XTAL2 pin. Reset switch connected at pin 9 of micro- controller provide manual reset of the microcontroller. Pull- Power Supply: As per the power requirement of the up network resistances of 10K are provide at each port to hardware of the intelligent traffic light control and monitor- properly differentiate between high and low TTL signal. ing system, supply of +5V w.r.t GND is developed as shown LCD connected with its three control signal RS (Resister in Figure 3. Select), R/W (Read/Write) and E (Enable) is used to display the outputs and status messages for the user. Port P0 is used to provide data to LCD to display as character. RV1 potenti- ometer controls the contrast of LCD. The intelligent traffic light control and monitoring system stores the recorded sample into its flash memory through its feature of In-Application programming. Data is stored with the real time and data stamp with it. This real time and date is provided by the user. ISSN NO: 2250-3536 VOLUME 2, ISSUE 2, MARCH 2012 31
  • 3. International Journal of Advanced Technology & Engineering Research (IJATER) Microcontroller transfers the recorded data to the comput- er by serial communication through MAX232. This data is Development of Software of Intelli- used for traffic monitoring by the user sitting on the comput- gent Traffic Light Control and Moni- er. To interface the UART and PC RS32 all the nine outputs are connected through MAX232 IC for the signal conver- toring System sion. Whole data transfer protocol is implemented through Assembler: software discussed later in this chapter. Software in visual Assembler is used to convert the assembly language code basic on computer end collects all recorded data. Three push to machine code. A51 assembler is used for this purpose. button switches for UP, DOWN and ENTER are interfaced Figure 6 shows the A51 assembler GUI. to microcontroller at respective pins of port P2. These switches are used for accept some numeric inputs from user for proper function of software of the system. Figure 5 Circuit Diagram of Sensor on road Figure 5 shows circuit diagram of IR transmitter and IR sensor situated on road. The system made here monitor and control the traffic movement for two roads respectively. Connector J1 and J2 of microcontroller board connects the IR sensor on road with the microcontroller board. Pin P1.0 from port P1 drives the IR transmitter by generating 38KHZ 50% duty cycle square wave. The IR sensor output is con- nected to pin P3.2 and P3.3 for both traffic light respective- ly. P1.0 control the IR LED D1 through Darlington pair formed by transistor Q1 and Q2. The Darlington pair just amplifies the current through IR LED. The IR sensor TSOP1738 detects the IR wave from IR LED and provides active low output at its pin3. SO whenever any vehicle passes through IR LED and IR sensor, the TSOP1738 pro- vide high output at its pin3. This obstacle in light is detected by the microcontroller. Signal from IR sensor is amplified by Q3 transistor. Figure 6 : Assembler GUI ISSN NO: 2250-3536 VOLUME 2, ISSUE 2, MARCH 2012 32
  • 4. International Journal of Advanced Technology & Engineering Research (IJATER) passes between IR transmitter and IR sensor, microcontroller In-System Programmer: detects and increase number of vehicle count in a recording P89V51RD2 microcontroller has the feature of In-System interval for particular traffic light. Traffic light is placed programming. Due to this it do not require any separate ahead of IR sensor at a distance so that decision taken by hardware programmer to get program. It includes an inbuilt microcontroller to control traffic light can help in reducing boot program, which helps it in programming, erasing and the congestion at traffic light. in-application programming. The object code formed by the On the basis vehicle count microcontroller decide the traf- assembler or cross compiler is loaded into the software fic light delays for next recording interval. Traffic light de- called IN-System programmer. Figure 7 shows a Flash mag- lays are classified as LOW, MEDIUM, HIGH range. Thee ic in system programmer. This window based programmer ranges are predefined by varying vehicle count. communicates with the microcontroller boot program through serial port. Microcontroller display shown in figure 8 shows its opera- tion. Figure 8: Microcontroller display at time of system running The L1 and L2 indicate the traffic light whose output user at system want to view. Next character current light acti- vated on traffic light. Next time in seconds indicate elapses time for current light. Next three characters show current mode of traffic light delay. This mode depends on the pre- vious vehicle count calculated in predefined recording inter- val. Figure 7 In-system Programmer GUI Second lie of display start with display running time of the system. Next is shown the vehicle count counted by the mi- Computer Software: crocontroller form IR sensor for respective traffic light. This The computer software for recorded data monitoring and count is for current recording time. After completion of re- system control is made in visual basic. The flowchart of the coding interval, this count value is saved in flash memory VB program is given below. Data transfer is initiated from for further analysis. computer through a user click in Visual Basic, which in turn requests the microcontroller serially. The microcontroller The microcontroller is connected to computer through a during its main loop continuously pools the serial port, as serial communication cable. Through the cable user sitting shown in flow chart. Microcontroller after getting the data on the computer as traffic administrator can command the transfer request from PC suspends its recording task tempo- microcontroller system to send the recorded data for moni- rarily and switches to data transfer mode. 9600 baud rate is toring. For the basis of data of traffic at respective load, used in the communication. Serial port communication pa- where sensor is situated, can update the timings of traffic rameters are initially configured for 9600 baud rate, 8 bit light delays with an updating command to microcontroller. data word, no parity, and 1 stop bit. Administrator can also send command microcontroller to . erase pervious recorded data after analysis. Below figure 9 shows the graphical user interface for administrator. Results Results include the successful operation of the intelligent traffic light control and monitoring system. The IR sensor with IR transmitter is placed at a gap. Gap acting as a proto- type indicating a road. The system is placed near road as a stand alone device. Whenever any obstacle like vehicle ISSN NO: 2250-3536 VOLUME 2, ISSUE 2, MARCH 2012 33
  • 5. International Journal of Advanced Technology & Engineering Research (IJATER) Figure 9 GUI of computer software Figure 11 Capture data from microcontroller on computer screen On basis of analysis administrator can command the mi- crocontroller of update the configuration of parameter to respective lights. The graphical user interface to update con- figuration is shown in figure 12 Figure 10 Communication port selection To initiate the serial communication administrator has to configure the Communication port as shown in figure 10. Whenever administrator command microcontroller to send recorded data, the microcontroller send al data, as vehicle count recorded on basis of recording interval, to computer. The microcontroller also sends s the running configuration of parameters (Vehicle range values, delays, recording inter- val) on traffic light. The data can be saved on the computer as a excel file. The real time data for analysis is shown on computer as shown in figure 11. . Figure 12 Configuration GUI on computer Conclusions and Future Scope In this paper we have studied the optimization of traffic light controller in a City using IR sensors and microcontrol- ler .Figure2 shows the basic block diagram of the system and figure-4. shows the complete circuit diagram of microcon- troller board. By using this system configuration we tries to ISSN NO: 2250-3536 VOLUME 2, ISSUE 2, MARCH 2012 34
  • 6. International Journal of Advanced Technology & Engineering Research (IJATER) reduce the possibilities of traffic jams, caused by traffic & Tell. Eng. Department, 41070 Veziroglu lights, to an extent and we have successfully gets the results. Yerleskesi, Izmit-Kocaeli, Turkey No. of passing vehicle in the fixed time slot on the road de- [7] Cihan Karakuzu. “Fuzzy logic based smart traffic cide the density range of traffics and on the basis of vehicle light simulator design and hardware implementation”. count microcontroller decide the traffic light delays for next Kocaeli University, Engineering Faculty, Electronics recording interval as shown in figure 8 and figure 12 .The & Tell. Eng. Department, 41070 Veziroglu recorded data can be downloaded to the computer through Yerleskesi, Izmit-Kocaeli, Turkey communication between microcontroller and the computer [8] Kok, Khiang Tan and Marzuki. “Intelligent Traffic and this is shown in Figure11. The Administrator sitting on Lights Control by Fuzzy Logic”. Malaysian Journal computer can command system (microcontroller) to down- of Computer Science load recorded data, update light delays, erase memory, etc. Thus administrator on a central station computer can access [9] István Varga. “Design of an Intelligent Traffic- traffic conditions on any approachable traffic lights and Control System”. Balázs Kulcsár, István Varga, nearby roads to reduce traffic congestions to an extent. SZTAKI, Hungary [10] A (Mildly) Intelligent Traffic Light System (a Blues- In future this system can be used to inform people about pec tutorial) different places traffic condition. data transfer between the [11] “Automatic Traffic Control System”. SMEU Astana microcontroller and computer can also be done through tele- Solutions Automatic Traffic Control System.htm phone network , data call activated SIM This technique allows the operator to gather the recorded data from a far [12] P89V51RD2 specification sheet. “Microcontroller with 64K Bytes Flash Memory”. [Online] Available end to his home computer without going there. Traffic lights can be increased to N number and traffic light control can be www.philips/devices/microcontroller.com done for whole city by sitting on a single place. [13] Multiple Traffic Control Using Wireless Sensor and Density Measuring Camera Amrita Rai and Govind Reference Singh Patel. Sensors & Transducers Journal Vol. 94, Issue 7, July 2008, pp. 126-132 [1] Ramón Martínez “Smart control system for LEDs traffic-lights based on PLC”. Dpt. de Señales, Sis- Biography temas y Radiocomunicaciones. Universidad Po- litécnica de Madrid ETSI de Telecommunica- tion.Ciudad Universitia s/n.28040 Madrid SPAIN [2]. Bechrakis D. A., Sparis P. D.” A flexible data logging device for wind potential measurements and statistic- al magnitudes”. Democritus university of Thrace, de- partment of electrical and computer engineering, me- chanical engineering laboratory, xanthi, 67 100, PROMILA SINHMAR is presently working as Assistant Greece Proffessor in Rawal Institute of Engg. and Technology, Fa- [3] Muhammad Ridwan. „Development of a Low Cost ridabad. After receiving the degree of B.Tech in the field of Smart Traffic Controller System”. Department of Me- Electronics and Communication from P.D.M. College of chanical and Materials Engineering Faculty of Engi- Engg. and Tech., Bahadurgarh, she completed her M.Tech. neering and Built Environment Universiti Kebang- from Y.M.C.A.I.E.T, Faridabad in the same field. Earlier she saan Malaysia, 43600 Bangi Selangor, Malaysia has worked as assistantproff. In M.V.N. education society, Palwal: Ms. Promila may be reached at promi- [4] Marco Wiering. “Intelligent Traffic Light Control”. la.sinhmar@gmail.com. Institute of information and computing sciences, utrecht university [5] W. Wen & C. L. Yang. “A dynamic and automatic traffic light control system for solving the road con- gestion problem”. [6] Cihan Karakuzu. “Fuzzy logic based smart traffic light simulator design and hardware implementation”. Kocaeli University, Engineering Faculty, Electronics ISSN NO: 2250-3536 VOLUME 2, ISSUE 2, MARCH 2012 35