Question

Problem 2 Assume you are an observer standing at a point along a three- lane roadway. All vehicles in lane 1 are traveling at 30 mph, all vehicles in lane 2 are traveling at 45 mph, and all vehicles in lane 3 are traveling at 60 mph. There is also a constant spacing of 0.5 miles between vehicles. If you collect spot speed data for all vehicles as they cross your observation point for 30 minutes, what will be the time-mean speed and space- mean speed for this traffic stream?

Answer 1

I have given the step by step procedure of the problem below. Please ask if you have any doubts in comment section.

' tanes vebicles ane of Gi ven Spee ds 60 mph. 45 mph 9 090 30 mp h, 69 996 (5)- 0.5miles vehitles between +he Spacing velocity veh capacity (9) Tvaffic Hea d w ay ha Miles vch hr miles veh ve hicles 30mph For 30 veh 30 veh /n 60 30 veh.cles 30 mins +he obser vatian of For are observed simi lanly 45mph for vehicles 45 90 vehlhr obs er ved of 4S vehicles veh. cles G0 mph similary For 60 120 A/4

obsev ved 6omph of 60 vehicles 1 ZV yo dnaun V Time mean speed 45)C45) GoC so)+(6CG) 3a+y5t 60 48.3 mph space mean speed VI 29lo dv EO t pe a sn V. Oev +i pg 30 45 1 + + 45 30 Celigm 3 (3a t 45t 5 mph 09Y ator 36 oVYo cdo ed4 9YYS20 -M
please rate

Thank you