Importance & classification of road

1. Importance &
classification of
Road

2.  Highway Engineering
The branch of civil engineering which deals with design,
planning, construction & maintainace of highway is
known as ‘Highway engineering’

3.  Classification of roads
A) According to traffic – based on traffic volume.
Types of roads vehicles per day
1. Very heavy traffic roads above 600
2. Heavy traffic roads 251 – 600
3. Medium traffic roads 70 – 250
4. Light traffic roads below 70
B) According to tonnage – based on tonnage.
Types of roads vehicles per day(m3)
1. Very heavy traffic roads above 1524
2. Heavy traffic roads 1017- 1524
3. Medium traffic roads 508 - 1017
4. Light traffic roads below 508

4.  Classification of roads
C) According to importance.
1. Class I roads
2. Class II roads
3. Class III roads
D) According to location & function.
1. National highways (N.H.)
2. State highways (S.H.)
3. Major district roads (M.D.R.)
4. Other district roads (O.D.R.)
5. Village roads (V.R.)

5.  Classification of roads by Nagpur Road plan.
1. National highways (N.H.)
2. State highways (S.H.)
3. Major district roads (M.D.R.)
4. Arterial roads (O.D.R.)

6. 1. National highway (N.H.)
The main highways running through the length and
breadth of India, joining major parts, capital of
states, foreign highways required for strategic
movement for the defense of India are known as
‘National highways’.
1. Amritsar – Ambala – Delhi road - NH1
2. Delhi – Agra – Kanpur – Calcutta road - NH2
3. Agra – Mumbai road - NH3
The responsibility of construction and maintenance –
central government.

7. 2. State highway (S.H.)
The highways linking up with the National highways,
district head quarters and important cities in states
are known as ‘State highways’.
The geometric design specification and design speed for
N.H. and S.H. are same.
The responsibility of construction and maintenance –
state government and central government gives
grant for development..

8. 3. Major District Roads (M.D.R.)
The important roads with a district connecting
production and markets places with each other or
with the main highways are known as ‘Major District
Roads’.
The responsibility of construction and maintenance –
district authorities and state government gives grant
for development.

9. 4. Other District Roads (O.D.R.)
The roads connecting market centers, tahsil head
quarters, railway station in district known as other
district roads. The design specification is low as
compare to M.D.R.
5. Village Roads (V.R.)
The roads connecting villages with each other or with
nearest road are known as ‘Village Roads’. These
roads are very important from the rural area
development point of view.
The responsibility of construction and maintenance –
local district authorities.