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Kerbs

Posted on 26th August 201822nd February 2022 By Malay Sautya

Contents

  • 1 Kerbs
    • 1.1 4 Types of Kerbs
      • 1.1.1 (a) Low or Mountable Kerbs
      • 1.1.2 (b) Low-Speed Barrier or Urban Parking Kerb 
      • 1.1.3 3. High-Speed Barrier Kerbs 
      • 1.1.4 4. Submerged Kerbs
    • 1.2 What are the uses of road kerbs?

Kerbs

What is Kerbs?
Kerbs are the component of a city road. A kerb also termed as a curb is a vertical or sloping member provided along the edge of a pavement or Shoulder to give strength and protect the edge of the pavement. 

The meaning of kerbs or curbs is a barrier or boundary. But in highway engineering, it indicates the boundary between the pavement and shoulder or sometimes island or footpath or car parking space.  

Kerbs -  Mountable, Submerged, High & Low-Speed Barrier Kerbs | Highway |

kerbs are generally constructed of cut stone or cement concrete slabs. The kerb and the road surface near the edge together from a side-channel which carries rainwater that comes from the road surface.

4 Types of Kerbs

Kerb is the boundary between the pavement and shoulder or footpath. kerb may be divided into four groups based on their functions.  

4 Types of Kerbs

Following are the 4 types of kerbs are used in the roads:

(a) Low or Mountable Kerbs

This is also known as class I kerb. Its principal role is to control traffic to stay within its own lane. As the height of this form of kerb is low, it facilitates the driver to enter the area of the shoulder with less difficulty.   

Low or Mountable Kerbs

This type of kerb is also beneficial for the longitudinal drainage system. The height of this type of kerbs is 70 to 80 mm. 

(b) Low-Speed Barrier or Urban Parking Kerb 

This is also known as Class II kerb. It prevents encroachment of slow speed or parking vehicles to the footpath. However, with severe emergency vehicles, they can climb and be parked on footpath or shoulder.  

 Low-Speed Barrier or Urban Parking Kerb

The height of this type of kerb is 150 to 200 mm with a batter of 25 mm to avoid the scraping of tyres.

3. High-Speed Barrier Kerbs 

This is also known as Class III kerb. It is usually used in critical places such as bridges or mountain roads, This type of kerbs are 230 to 450 mm or more in height.  

High-Speed Barrier Kerbs

4. Submerged Kerbs

Submerged kerbs are provided in rural roads at pavement edges between edge and shoulders. It is provided in the form of standing bricks or concrete blocks.  

Submerged Kerbs

It offers lateral stability to the granular base course and flexible pavements.

What are the uses of road kerbs?

Curb or kerbs are provided for the following purposes:

1. This prevents the vehicle from parking beside the road.

2. It acts as a boundary between the pavement and footpath.

3. Kerbs provide structural support for the pavement.

4. It helps to overcome slipping risk of the vehicles.

5. It helps to reduce the number of accident.

6. It also used for drainage purpose.

Read Also: 

5 Components of a City Road-Footpath, Kerbs, Pedestrian Crossing, Traffic lane, Median

Types of Roads 

Spoil Bank

Lead and Lift  in Earthwork

Turfing in Earthwork Embankment 

Highway engineering

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