PROBLEM $1$

A Class II two$-$lane highway needs to be redesigned for an area with rolling terrain. During the peak hour $400$ vehicles are travelling in the analysis direction and $300$ vehicles are traveling in the opposing direction. The PHF is $0\mathrm{.}92.$ The traffic stream has $8\%$ trucks, $2\%$ buses, and no recreation vehicles. What is the maximum percentage of no passing zones that can be incorporated in the design to guarantee the minimum LOS of C$?$