Question
Download Solution PDFWhich of the following is one of the reasons to provide extra-widening on highways?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanantion:
Extra width provide to Road at horizontal curve is called extra widening.
Path travelled by front axle and path travelled by rear axle it is not same on horizontal curve this phenomena is called off tracking, So extra-widening is provided to consider off-tracking of vehicles. It is provided for following purposes:
- To avoid off tracking due to rigidity of wheel base.
- To encounter psychological tendency of driver.
- To increase visibility at curve.
- To account lateral skidding.
Additional Information Extra widening is split up into two parts -
Mechanical widening
Psychological widening
(i) Mechanical widening:
Mechanical widening is provided to account off tracking.
(ii) Psychological widening:
There is a psychological tendency of driver to drive the vehicle close to the edge of pavement and maintain more side gap between the vehicle moving parallel.
Last updated on Jul 1, 2025
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