Highway Engineering
In CBR test the value of CBR is calculated at

2.5 mm penetration only
5.0 mm penetration only
7.5 mm penetration only
both 2.5 mm and 5.0 mm penetrations

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Highway Engineering
Length of a vehicle affects

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

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