(Solved): Question 1 (30 points): There are two routes between origin A and destination B, and their volume d ...

Question 1 (30 points):

There are two routes between origin A and destination B, and their volume delay functions are shown in the figure below (T is the travel time in minutes, V is the traffic volume in vehicle trips). The total travel demand from A to B is 1500 trips. Use the user equilibrium and system optimal approaches to assign trips on two routes.

(1) How many trips are assigned to Route #1 under UE and SO?

(2) Why does the system optimal approach provide lower total travel cost than the user equilibrium approach?

(3) How would you modify the cost function of the two routes such that the outcome of the UE is the same as the outcome of the SO?

Question 1 (30 points): There are two routes between origin \( \mathrm{A} \) and destination \( \mathrm{B} \), and their volume delay functions are shown in the figure below ( \( \mathrm{T} \) is the travel time in minutes, \( \mathrm{V} \) is the traffic volume in vehicle trips). The total travel demand from A to B is 1500 trips. Use the user equilibrium and system optimal approaches to assign trips on two routes. (1) How many trips are assigned to Route #1 under UE and SO? (2) Why does the system optimal approach provide lower total travel cost than the user equilibrium approach? (3) How would you modify the cost function of the two routes such that the outcome of the UE is the same as the outcome of the SO?