. A four-lane arterial (with two lanes in each direction) has acapacity of 1000 vehicleshourlane. Due to some road repair work,the maximum capacity of two lanes in the northbound direction isreduced to 1100 veh/hr from 2000 veh/hr for a short length of 200ft. If the total traffic upstream of the repair site in thenorthbound lanes is reasonably at 1500 vehhr, find (a the meanspeed of traffic through the repair site and (b) the stead rate atwhich the queue approaching the repair site grows. Assume the jamdensity is 200 vehicles/milenane.
