Highway Engineering
Length of a vehicle affects

width of traffic lanes
width of shoulders and parking facilities
clearance to be provided under structures such as overbridges, under-bridges etc.
extra width of pavement and minimum turning radius

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Highway Engineering
If b is the wheel track of a vehicle and h is the height of centre of gravity above road surface, then to avoid overturning and lateral skidding on a horizontal curve, the centrifugal ratio should always be

less than b/2h and also less than co-efficient of lateral friction
greater than b/2h and less than co-efficient of lateral friction
less than b/2h and greater than co-efficient of lateral friction
greater than b/2h and also greater than coefficient of lateral friction

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Highway Engineering
The provision of traffic signals at intersections

reduces rear end collisions but may increase right angled collisions
reduces right angled collisions but may increase rear end collisions
reduces right angled and rear end collisions
increases right angled and rear end collisions

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