QUESTION 26 At an entrance to a toll bridge, four toll booths are open. Vehicles arrive at the bridge at an average rate of 900 veh/h, and at the booths, drivers take an average of 12 seconds to pay their tolls. Both the arrival and departure headways can be assumed to be exponentially distributed How would the average queue length change if a fifth toll booth were opened? a. The average queue length is reduced by 1.17 vehicles D.The average queue length is reduced by 2.68 vehicles. C. The average queue length is reduced by 3.76 vehicles. d. The average queue length is reduced by 4.23 vehicles. e.The average queue length is reduced by 5.15 vehicles. QUESTION 27 For the toll booths described in Q26 above, how would the average waiting time in the queue change if a fifth toll booth were opened? a. The waiting time is reduced by 2.5 seconds. b. The waiting time is reduced by 4.7 seconds d.The waiting time is reduced by 7.9 seconds. e. The waiting time is reduced by 9.8 seconds.
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