SlideShare a Scribd company logo
1 of 4
Traditionally, vehicle detection for the majority of solar traffic signal controller applications has
been via the simple inductive loop. Whilst loops have proven to be generally reliable, their
design and functioning has led many industry professionals to question their practicality and
cost-effectiveness.
Clearview Traffic offers the M100 wireless vehicle detection system which utilises new
technologies to ensure a smooth installation and deliver a long-term solution for ultra efficient
traffic signal control.
Since there's no trenching or ducting involved, the slim line profile of the M100 can be installed
quickly and easily and is also fully type-approved to the Highways Agency's specifications and
also is compatible with all types of MIDAS outstations and urban traffic light systems such as
SCOOT, MOVA and System D.
Intelligent traffic signal controller
Nowadays, traffic lights have become an integral part of human`s
day-to-day life. With this motivation in the mind, intelligent traffic signal
controller aims at designing and implementing, a running model of solar
traffic light controller which is controlled according to the density of
vehicle on road.
What does the intelligent traffic signal controller aim at? It controls
up to 4-phases traffic system with the traffic flow optimization strategies,
optimize the traffic flow at network junctions, measurable improve traffic
flow, reduce environmental pollution caused by traffic ,most importantly
increase road safety.
What can intelligent traffic signal controller bring us? It can reduce
vehicle-pedestrian conflicts and reduce or increase waiting time, what is
more, the duration of green light can be adapted to the user`s needs.
Therefore, it contributes to public safety and security on streets and
sidewalks, reduce the risk of accident on road ways, cycle paths and
sidewalks and make a city more attractive, improve the quality of life.
The solar traffic signal controller just work on the solar panel, work
theory is as follows: life cycle costs typically 20% of existing technology,
6 Watt to 45W Luminaries ,Battery selection with 10 yr guarantee,
installation is easy, install the anti-skid unloaded the lamp pole, and
install the bracket on the solar panel, adjust the solar panel`s direction and
angle, then tight the screw at last.
A pole traffic light is green other theree ploes are red they are
transmitting IR wave from the IR transimitting led IR automated vehicle
ignityion off circuit works nearby 3-5 inch area straight . It off the
ignition supply of the vehicle for stop.
Use of intelligent traffic signal controller instead of other controllers
such as PLC makes the smart traffic signal controller hardware a low
cost system. The program downloaded into the microcontroller enables
it to have a high accuracy timing, high independency and consistenctly,
it enabales the proposed intelligent traffic signal controller system to
realize traffic flow optimization strategies at a single or network
junctions.
I have one mounted over one of my work benches. I wanted to make it work but
couldn't find an electronic controller. I'm not really into electronics and didn't want
to design my own. Then I came up with an idea to make it work. I went real old
school mechanical by utilizing an old barbecue grill rotisserie, some unused power
drill brushes, and a wooden disk with 3 brass pie shaped pieces glued onto its face
-all stuffed in a little box on the wall behind my traffic light in a back room. The
lights change just right, long green, short yellow, long red, long green, ect...
I thought I was being crafty/ingenious with this design but then a week after I
made the thing, I found an electronic controller on Amazon for cheap
money.
Anyhow here is my traffic light, just wish it had the shields over the lamps...
The new traffic lights you are seeing are made out of arrays of light emitting diodes (LEDs).
These are tiny, purely electronic lights that are extremely energy efficient and have a very long
life. Each LED is about the size of a pencil eraser, so hundreds of them are used together in an
array. The LEDs are replacing the old-style incandescent halogen bulbs rated at between 50
and 150 watts. Most cities in the United States are in the process of replacing their
incandescent traffic lights with LED units because of three big advantages:
LEDs are brighter. The LED arrays fill the entire "hole" and have equal brightness across the
entire surface, making them brighter overall.
LED bulbs last for years, while halogen bulbs last for months. Replacing bulbs costs money
for the trucks and people who do the work, and it also ties up traffic. Increasing the
replacement interval can save a city big dollars.
LED bulbs save a lot of energy.
The energy savings of LED lights can be huge. Assume that a traffic light uses 100-watt bulbs
today. The light is on 24 hours a day, so it uses 2.4 kilowatt-hours per day. If you assume
power costs 8 cents per kilowatt-hour, it means that one traffic signal costs about 20 cents a
day to operate, or about $73 per year. There are perhaps eight signals per intersection, so
that's almost $600 per year in power per intersection. A big city has thousands of intersections,
so it can cost millions of dollars just to power all the traffic lights. LED bulbs might consume 15
or 20 watts instead of 100, so the power consumption drops by a factor of five or six. A city can
easily save a million dollars a year by replacing all of the bulbs with LED units. These
low-energy bulbs also open the possibility of using solar panels instead of running an electrical
line, which saves money in remote areas.

More Related Content

Recently uploaded

unwanted pregnancy Kit [+918133066128] Abortion Pills IN Dubai UAE Abudhabi
unwanted pregnancy Kit [+918133066128] Abortion Pills IN Dubai UAE Abudhabiunwanted pregnancy Kit [+918133066128] Abortion Pills IN Dubai UAE Abudhabi
unwanted pregnancy Kit [+918133066128] Abortion Pills IN Dubai UAE Abudhabi
Abortion pills in Kuwait Cytotec pills in Kuwait
 
Call Girls Jp Nagar Just Call 👗 7737669865 👗 Top Class Call Girl Service Bang...
Call Girls Jp Nagar Just Call 👗 7737669865 👗 Top Class Call Girl Service Bang...Call Girls Jp Nagar Just Call 👗 7737669865 👗 Top Class Call Girl Service Bang...
Call Girls Jp Nagar Just Call 👗 7737669865 👗 Top Class Call Girl Service Bang...
amitlee9823
 
FULL ENJOY Call Girls In Majnu Ka Tilla, Delhi Contact Us 8377877756
FULL ENJOY Call Girls In Majnu Ka Tilla, Delhi Contact Us 8377877756FULL ENJOY Call Girls In Majnu Ka Tilla, Delhi Contact Us 8377877756
FULL ENJOY Call Girls In Majnu Ka Tilla, Delhi Contact Us 8377877756
dollysharma2066
 
Nelamangala Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...
Nelamangala Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...Nelamangala Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...
Nelamangala Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...
amitlee9823
 
Chandigarh Escorts Service 📞8868886958📞 Just📲 Call Nihal Chandigarh Call Girl...
Chandigarh Escorts Service 📞8868886958📞 Just📲 Call Nihal Chandigarh Call Girl...Chandigarh Escorts Service 📞8868886958📞 Just📲 Call Nihal Chandigarh Call Girl...
Chandigarh Escorts Service 📞8868886958📞 Just📲 Call Nihal Chandigarh Call Girl...
Sheetaleventcompany
 
Call Now ☎️🔝 9332606886🔝 Call Girls ❤ Service In Bhilwara Female Escorts Serv...
Call Now ☎️🔝 9332606886🔝 Call Girls ❤ Service In Bhilwara Female Escorts Serv...Call Now ☎️🔝 9332606886🔝 Call Girls ❤ Service In Bhilwara Female Escorts Serv...
Call Now ☎️🔝 9332606886🔝 Call Girls ❤ Service In Bhilwara Female Escorts Serv...
Anamikakaur10
 
Quick Doctor In Kuwait +2773`7758`557 Kuwait Doha Qatar Dubai Abu Dhabi Sharj...
Quick Doctor In Kuwait +2773`7758`557 Kuwait Doha Qatar Dubai Abu Dhabi Sharj...Quick Doctor In Kuwait +2773`7758`557 Kuwait Doha Qatar Dubai Abu Dhabi Sharj...
Quick Doctor In Kuwait +2773`7758`557 Kuwait Doha Qatar Dubai Abu Dhabi Sharj...
daisycvs
 
FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756
FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756
FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756
dollysharma2066
 
Call Girls In Noida 959961⊹3876 Independent Escort Service Noida
Call Girls In Noida 959961⊹3876 Independent Escort Service NoidaCall Girls In Noida 959961⊹3876 Independent Escort Service Noida
Call Girls In Noida 959961⊹3876 Independent Escort Service Noida
dlhescort
 

Recently uploaded (20)

unwanted pregnancy Kit [+918133066128] Abortion Pills IN Dubai UAE Abudhabi
unwanted pregnancy Kit [+918133066128] Abortion Pills IN Dubai UAE Abudhabiunwanted pregnancy Kit [+918133066128] Abortion Pills IN Dubai UAE Abudhabi
unwanted pregnancy Kit [+918133066128] Abortion Pills IN Dubai UAE Abudhabi
 
PHX May 2024 Corporate Presentation Final
PHX May 2024 Corporate Presentation FinalPHX May 2024 Corporate Presentation Final
PHX May 2024 Corporate Presentation Final
 
Call Girls Jp Nagar Just Call 👗 7737669865 👗 Top Class Call Girl Service Bang...
Call Girls Jp Nagar Just Call 👗 7737669865 👗 Top Class Call Girl Service Bang...Call Girls Jp Nagar Just Call 👗 7737669865 👗 Top Class Call Girl Service Bang...
Call Girls Jp Nagar Just Call 👗 7737669865 👗 Top Class Call Girl Service Bang...
 
FULL ENJOY Call Girls In Majnu Ka Tilla, Delhi Contact Us 8377877756
FULL ENJOY Call Girls In Majnu Ka Tilla, Delhi Contact Us 8377877756FULL ENJOY Call Girls In Majnu Ka Tilla, Delhi Contact Us 8377877756
FULL ENJOY Call Girls In Majnu Ka Tilla, Delhi Contact Us 8377877756
 
Cracking the Cultural Competence Code.pptx
Cracking the Cultural Competence Code.pptxCracking the Cultural Competence Code.pptx
Cracking the Cultural Competence Code.pptx
 
Nelamangala Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...
Nelamangala Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...Nelamangala Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...
Nelamangala Call Girls: 🍓 7737669865 🍓 High Profile Model Escorts | Bangalore...
 
Call Girls Zirakpur👧 Book Now📱7837612180 📞👉Call Girl Service In Zirakpur No A...
Call Girls Zirakpur👧 Book Now📱7837612180 📞👉Call Girl Service In Zirakpur No A...Call Girls Zirakpur👧 Book Now📱7837612180 📞👉Call Girl Service In Zirakpur No A...
Call Girls Zirakpur👧 Book Now📱7837612180 📞👉Call Girl Service In Zirakpur No A...
 
Dr. Admir Softic_ presentation_Green Club_ENG.pdf
Dr. Admir Softic_ presentation_Green Club_ENG.pdfDr. Admir Softic_ presentation_Green Club_ENG.pdf
Dr. Admir Softic_ presentation_Green Club_ENG.pdf
 
Chandigarh Escorts Service 📞8868886958📞 Just📲 Call Nihal Chandigarh Call Girl...
Chandigarh Escorts Service 📞8868886958📞 Just📲 Call Nihal Chandigarh Call Girl...Chandigarh Escorts Service 📞8868886958📞 Just📲 Call Nihal Chandigarh Call Girl...
Chandigarh Escorts Service 📞8868886958📞 Just📲 Call Nihal Chandigarh Call Girl...
 
Call Now ☎️🔝 9332606886🔝 Call Girls ❤ Service In Bhilwara Female Escorts Serv...
Call Now ☎️🔝 9332606886🔝 Call Girls ❤ Service In Bhilwara Female Escorts Serv...Call Now ☎️🔝 9332606886🔝 Call Girls ❤ Service In Bhilwara Female Escorts Serv...
Call Now ☎️🔝 9332606886🔝 Call Girls ❤ Service In Bhilwara Female Escorts Serv...
 
RSA Conference Exhibitor List 2024 - Exhibitors Data
RSA Conference Exhibitor List 2024 - Exhibitors DataRSA Conference Exhibitor List 2024 - Exhibitors Data
RSA Conference Exhibitor List 2024 - Exhibitors Data
 
Call Girls Ludhiana Just Call 98765-12871 Top Class Call Girl Service Available
Call Girls Ludhiana Just Call 98765-12871 Top Class Call Girl Service AvailableCall Girls Ludhiana Just Call 98765-12871 Top Class Call Girl Service Available
Call Girls Ludhiana Just Call 98765-12871 Top Class Call Girl Service Available
 
Quick Doctor In Kuwait +2773`7758`557 Kuwait Doha Qatar Dubai Abu Dhabi Sharj...
Quick Doctor In Kuwait +2773`7758`557 Kuwait Doha Qatar Dubai Abu Dhabi Sharj...Quick Doctor In Kuwait +2773`7758`557 Kuwait Doha Qatar Dubai Abu Dhabi Sharj...
Quick Doctor In Kuwait +2773`7758`557 Kuwait Doha Qatar Dubai Abu Dhabi Sharj...
 
Falcon's Invoice Discounting: Your Path to Prosperity
Falcon's Invoice Discounting: Your Path to ProsperityFalcon's Invoice Discounting: Your Path to Prosperity
Falcon's Invoice Discounting: Your Path to Prosperity
 
BAGALUR CALL GIRL IN 98274*61493 ❤CALL GIRLS IN ESCORT SERVICE❤CALL GIRL
BAGALUR CALL GIRL IN 98274*61493 ❤CALL GIRLS IN ESCORT SERVICE❤CALL GIRLBAGALUR CALL GIRL IN 98274*61493 ❤CALL GIRLS IN ESCORT SERVICE❤CALL GIRL
BAGALUR CALL GIRL IN 98274*61493 ❤CALL GIRLS IN ESCORT SERVICE❤CALL GIRL
 
JAYNAGAR CALL GIRL IN 98274*61493 ❤CALL GIRLS IN ESCORT SERVICE❤CALL GIRL
JAYNAGAR CALL GIRL IN 98274*61493 ❤CALL GIRLS IN ESCORT SERVICE❤CALL GIRLJAYNAGAR CALL GIRL IN 98274*61493 ❤CALL GIRLS IN ESCORT SERVICE❤CALL GIRL
JAYNAGAR CALL GIRL IN 98274*61493 ❤CALL GIRLS IN ESCORT SERVICE❤CALL GIRL
 
FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756
FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756
FULL ENJOY Call Girls In Mahipalpur Delhi Contact Us 8377877756
 
Call Girls In Noida 959961⊹3876 Independent Escort Service Noida
Call Girls In Noida 959961⊹3876 Independent Escort Service NoidaCall Girls In Noida 959961⊹3876 Independent Escort Service Noida
Call Girls In Noida 959961⊹3876 Independent Escort Service Noida
 
How to Get Started in Social Media for Art League City
How to Get Started in Social Media for Art League CityHow to Get Started in Social Media for Art League City
How to Get Started in Social Media for Art League City
 
Katrina Personal Brand Project and portfolio 1
Katrina Personal Brand Project and portfolio 1Katrina Personal Brand Project and portfolio 1
Katrina Personal Brand Project and portfolio 1
 

Featured

How Race, Age and Gender Shape Attitudes Towards Mental Health
How Race, Age and Gender Shape Attitudes Towards Mental HealthHow Race, Age and Gender Shape Attitudes Towards Mental Health
How Race, Age and Gender Shape Attitudes Towards Mental Health
ThinkNow
 
Social Media Marketing Trends 2024 // The Global Indie Insights
Social Media Marketing Trends 2024 // The Global Indie InsightsSocial Media Marketing Trends 2024 // The Global Indie Insights
Social Media Marketing Trends 2024 // The Global Indie Insights
Kurio // The Social Media Age(ncy)
 

Featured (20)

Everything You Need To Know About ChatGPT
Everything You Need To Know About ChatGPTEverything You Need To Know About ChatGPT
Everything You Need To Know About ChatGPT
 
Product Design Trends in 2024 | Teenage Engineerings
Product Design Trends in 2024 | Teenage EngineeringsProduct Design Trends in 2024 | Teenage Engineerings
Product Design Trends in 2024 | Teenage Engineerings
 
How Race, Age and Gender Shape Attitudes Towards Mental Health
How Race, Age and Gender Shape Attitudes Towards Mental HealthHow Race, Age and Gender Shape Attitudes Towards Mental Health
How Race, Age and Gender Shape Attitudes Towards Mental Health
 
AI Trends in Creative Operations 2024 by Artwork Flow.pdf
AI Trends in Creative Operations 2024 by Artwork Flow.pdfAI Trends in Creative Operations 2024 by Artwork Flow.pdf
AI Trends in Creative Operations 2024 by Artwork Flow.pdf
 
Skeleton Culture Code
Skeleton Culture CodeSkeleton Culture Code
Skeleton Culture Code
 
PEPSICO Presentation to CAGNY Conference Feb 2024
PEPSICO Presentation to CAGNY Conference Feb 2024PEPSICO Presentation to CAGNY Conference Feb 2024
PEPSICO Presentation to CAGNY Conference Feb 2024
 
Content Methodology: A Best Practices Report (Webinar)
Content Methodology: A Best Practices Report (Webinar)Content Methodology: A Best Practices Report (Webinar)
Content Methodology: A Best Practices Report (Webinar)
 
How to Prepare For a Successful Job Search for 2024
How to Prepare For a Successful Job Search for 2024How to Prepare For a Successful Job Search for 2024
How to Prepare For a Successful Job Search for 2024
 
Social Media Marketing Trends 2024 // The Global Indie Insights
Social Media Marketing Trends 2024 // The Global Indie InsightsSocial Media Marketing Trends 2024 // The Global Indie Insights
Social Media Marketing Trends 2024 // The Global Indie Insights
 
Trends In Paid Search: Navigating The Digital Landscape In 2024
Trends In Paid Search: Navigating The Digital Landscape In 2024Trends In Paid Search: Navigating The Digital Landscape In 2024
Trends In Paid Search: Navigating The Digital Landscape In 2024
 
5 Public speaking tips from TED - Visualized summary
5 Public speaking tips from TED - Visualized summary5 Public speaking tips from TED - Visualized summary
5 Public speaking tips from TED - Visualized summary
 
ChatGPT and the Future of Work - Clark Boyd
ChatGPT and the Future of Work - Clark Boyd ChatGPT and the Future of Work - Clark Boyd
ChatGPT and the Future of Work - Clark Boyd
 
Getting into the tech field. what next
Getting into the tech field. what next Getting into the tech field. what next
Getting into the tech field. what next
 
Google's Just Not That Into You: Understanding Core Updates & Search Intent
Google's Just Not That Into You: Understanding Core Updates & Search IntentGoogle's Just Not That Into You: Understanding Core Updates & Search Intent
Google's Just Not That Into You: Understanding Core Updates & Search Intent
 
How to have difficult conversations
How to have difficult conversations How to have difficult conversations
How to have difficult conversations
 
Introduction to Data Science
Introduction to Data ScienceIntroduction to Data Science
Introduction to Data Science
 
Time Management & Productivity - Best Practices
Time Management & Productivity -  Best PracticesTime Management & Productivity -  Best Practices
Time Management & Productivity - Best Practices
 
The six step guide to practical project management
The six step guide to practical project managementThe six step guide to practical project management
The six step guide to practical project management
 
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
Beginners Guide to TikTok for Search - Rachel Pearson - We are Tilt __ Bright...
 
Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...
Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...
Unlocking the Power of ChatGPT and AI in Testing - A Real-World Look, present...
 

新建 Microsoft word 文档 (2)

  • 1. Traditionally, vehicle detection for the majority of solar traffic signal controller applications has been via the simple inductive loop. Whilst loops have proven to be generally reliable, their design and functioning has led many industry professionals to question their practicality and cost-effectiveness. Clearview Traffic offers the M100 wireless vehicle detection system which utilises new technologies to ensure a smooth installation and deliver a long-term solution for ultra efficient traffic signal control. Since there's no trenching or ducting involved, the slim line profile of the M100 can be installed quickly and easily and is also fully type-approved to the Highways Agency's specifications and also is compatible with all types of MIDAS outstations and urban traffic light systems such as SCOOT, MOVA and System D. Intelligent traffic signal controller Nowadays, traffic lights have become an integral part of human`s day-to-day life. With this motivation in the mind, intelligent traffic signal controller aims at designing and implementing, a running model of solar traffic light controller which is controlled according to the density of vehicle on road.
  • 2. What does the intelligent traffic signal controller aim at? It controls up to 4-phases traffic system with the traffic flow optimization strategies, optimize the traffic flow at network junctions, measurable improve traffic flow, reduce environmental pollution caused by traffic ,most importantly increase road safety. What can intelligent traffic signal controller bring us? It can reduce vehicle-pedestrian conflicts and reduce or increase waiting time, what is more, the duration of green light can be adapted to the user`s needs. Therefore, it contributes to public safety and security on streets and sidewalks, reduce the risk of accident on road ways, cycle paths and sidewalks and make a city more attractive, improve the quality of life. The solar traffic signal controller just work on the solar panel, work theory is as follows: life cycle costs typically 20% of existing technology, 6 Watt to 45W Luminaries ,Battery selection with 10 yr guarantee, installation is easy, install the anti-skid unloaded the lamp pole, and install the bracket on the solar panel, adjust the solar panel`s direction and angle, then tight the screw at last. A pole traffic light is green other theree ploes are red they are transmitting IR wave from the IR transimitting led IR automated vehicle ignityion off circuit works nearby 3-5 inch area straight . It off the
  • 3. ignition supply of the vehicle for stop. Use of intelligent traffic signal controller instead of other controllers such as PLC makes the smart traffic signal controller hardware a low cost system. The program downloaded into the microcontroller enables it to have a high accuracy timing, high independency and consistenctly, it enabales the proposed intelligent traffic signal controller system to realize traffic flow optimization strategies at a single or network junctions. I have one mounted over one of my work benches. I wanted to make it work but couldn't find an electronic controller. I'm not really into electronics and didn't want to design my own. Then I came up with an idea to make it work. I went real old school mechanical by utilizing an old barbecue grill rotisserie, some unused power drill brushes, and a wooden disk with 3 brass pie shaped pieces glued onto its face -all stuffed in a little box on the wall behind my traffic light in a back room. The lights change just right, long green, short yellow, long red, long green, ect... I thought I was being crafty/ingenious with this design but then a week after I made the thing, I found an electronic controller on Amazon for cheap money. Anyhow here is my traffic light, just wish it had the shields over the lamps... The new traffic lights you are seeing are made out of arrays of light emitting diodes (LEDs). These are tiny, purely electronic lights that are extremely energy efficient and have a very long life. Each LED is about the size of a pencil eraser, so hundreds of them are used together in an array. The LEDs are replacing the old-style incandescent halogen bulbs rated at between 50 and 150 watts. Most cities in the United States are in the process of replacing their incandescent traffic lights with LED units because of three big advantages: LEDs are brighter. The LED arrays fill the entire "hole" and have equal brightness across the entire surface, making them brighter overall.
  • 4. LED bulbs last for years, while halogen bulbs last for months. Replacing bulbs costs money for the trucks and people who do the work, and it also ties up traffic. Increasing the replacement interval can save a city big dollars. LED bulbs save a lot of energy. The energy savings of LED lights can be huge. Assume that a traffic light uses 100-watt bulbs today. The light is on 24 hours a day, so it uses 2.4 kilowatt-hours per day. If you assume power costs 8 cents per kilowatt-hour, it means that one traffic signal costs about 20 cents a day to operate, or about $73 per year. There are perhaps eight signals per intersection, so that's almost $600 per year in power per intersection. A big city has thousands of intersections, so it can cost millions of dollars just to power all the traffic lights. LED bulbs might consume 15 or 20 watts instead of 100, so the power consumption drops by a factor of five or six. A city can easily save a million dollars a year by replacing all of the bulbs with LED units. These low-energy bulbs also open the possibility of using solar panels instead of running an electrical line, which saves money in remote areas.