A multilane highway (three lanes in each direction) is on level terrain. The free flow speed has been measured at 50mph. The peak-hour directional volume is 1500 vehicles with 10% heavy vehicles, and PHF is 0.9. If the proportion of vehicles types and peak-hour factor remains constant, how many vehicles can be added to the directional volume before capacity is reached?

A eight-lane multilane highway (four lanes in each direction) currently operates at maximum LOS C conditions. The measured FFS is 50 mi/h. The highway is on rolling terrain with 11% SUTS and 11% TTs, and the peak-hour factor is 0.92. If 13.4% of all directional traffic occurs during the peak hour, determine the total directional traffic volume.

14. Free-flow speed of vehicles on a road section is 88 km/h. Jammed density is 228 veh/km. Determine the traffic density on the road if traffic flow is at a maximum level. Also determine the possible maximum flow for the road section and the average speed of vehicles at that maximum traffic flow rate. (114 veh/km, 5016 veh/h, 44 km/h)

Transportation Engineering