P. 30th highest hourly volume is used for safe speed limits over a highway
Q. The summit curves length on a two lane one way road is based on non passing sight
distance.
R. Maximum traffic volume over a road is alled capacity of the road
S. Frictional Stresses in rigid pavements are compressive in summer and tensile in winter
P. Incorrect : The 30th highest hourly traffic volume (DHV) is used for the design of highway
facilities, not for determining safe speed limits.
Q. Correct : For a two-lane one-way road, the length of a summit curve is based on non
passing sight distance (Stopping Sight Distance) because overtaking sight distance is not
required.
R. Correct : The maximum traffic volume that a road can accommodate under prevailing
roadway and traffic conditions is called the capacity of the road.
S. Correct : In rigid pavements, frictional stresses are:
Summer: Compressive stress due to expansion.
Winter: Tensile stress due to contraction.
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