Highway Engineering - Engineering

Q1:

Minimum permissible speed on high speed roads, is decided on the basis of

A 15 percentile cumulative frequency

B 20 percentile cumulative frequency

C 30 percentile cumulative frequency

D 40 percentile cumulative frequency.

ANS:A - 15 percentile cumulative frequency

98th percentile = Geometric design.
85th percentile = Upper-speed limit.
75th percentile = Safe speed.
15th percentile = Lower speed limit.