On a highway the free mean speed was 75 kmph and centre to centre spacing between vehicles at jam density was 6.25 m. The maximum flow density that can be expected will be A 1500 vph B 2250 vph C 3000 vph D 3750 vph 7

Highway .

The 4 northbound lanes of a rural freeway segment have 13 ft lane widths. There is no lateral clearance afforded on either side of the road. There are no ramps within the area of influence. What is the estimated FFS (mph)? Provide your answer to the nearest tenths. Response Feedback: The BFFS of 75.4 mph is adjusted by 1.2 mph for the lack of lateral clearance.

A freeway traffic stream was observed to have a density of 22.0 veh/mi/ln when the mean speed was 55.0 mi/h. On another occasion at the same location, the jam density was found to be 132 veh/mi/ln. Assume Greenshields' model of traffic flow applies. The optimum speed (in mi/h) is: a) 22.0 b) 33.0 c) 55.0 d) 66.0 e) None of he above