Question: [ Route Choice ] Two routes connect an origin and destination with performance functions t 1 = 5 + 3 x 1 and t 2

[Route Choice] Two routes connect an origin and destination with performance functions
t1=5+3x1 and t2=7+x2, with t's in minutes and x's in thousands of vehicles per hour.
Total origin-destination demand is 7000 vehicles in the peak hour.
a) What are user equilibrium and system optimal route flows and total travel times?
b) Can you propose a toll scheme under which the tolled user equilibrium route flows
colludes with that under system optimum?
[ Route Choice ] Two routes connect an origin and

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