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You are here: Home / Transportation Engineering / Cross section of General and urban road | Types of curbs

Cross section of General and urban road | Types of curbs

February 20, 2013 by admin Leave a Comment

Cross section of road

Cross section of road consists of

  1. Carriage way.
  2. Shoulders and
  3. Right of way.

Carriage way

The metal portion (TST or carpeted) which is used for the smooth movement of the vehicles is known as carriage way.

Cross section of urban road

Foot path or side walk is added in the cross section in addition to the cross section of general road.

cross section of road

Foot path of side walk is the passage for the pedestrians.

Parallel strips along with the carriage way in urban road along with the carriage way throughout the road.

Requirements of foot path:

  1. It Must be neat clean.
  2. It Must be level.
  3. It must be Free from obstacles.
  4. Minimum recommended width is 4 feet.

Curb

The dividing line of carriage way and foot path is known as curb. Curb helps in the drainage purpose.

Types of kerbs

Mountable curb

The curb in which there is a certain slope is known as mountable curb. Its recommended height is 6 inches. It is helpful for easy parking as it is a slide so the cars can easily park over there.

Barrier curb

The curb whose height is above 6 inches is known as barrier curb. It does not help in parking. It is used in under passes and fly overs where we do not want parking.

Factors affecting road width

Factors upon which the width of carriage way depends are:

Speed of vehicles

If the speed of vehicles are high then the width of the road will be more. And if the speed of the vehicles are slow then the width will be less.

Dimensions or types of vehicles 

Dimensions or types of vehicles moving on the carriage way ( LTV or HTV). The standard recommended width of the vehicles is 8 feet.

Road width also depends upon types of shoulders

Traffic volume

If greater volume of traffic, then width of the road will be kept more. Maximum recommended volume of traffic is 400 vehicles / hour then the width of carriage way is 12 feet. The carriage way is recommended as a dual carriage way.

Road width also depends upon condition of shoulders.

Filed Under: Transportation Engineering

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