Peak-hour traffic demand between an origin and destination pair is initially 3500 veh/h. The two routes connecting the pairs have performance functions t₁ = 2+3 and t₂ = 4+222, where the times t₁ and t₂ are in minutes and the flows 1 and 2 and capacities c₁ and c₂ are in thousands of vehicles per hour. Initially, the capacities of routes 1 and 2 are 2500 and 4000 veh/h. A reconstruction project reduces capacity on route 2 to 2000 veh/hr. What is the flow x₁ (in thousands of vehicles) on route 1 before the reconstruction? 2.206 2.206 Assuming user equilibrium before and during reconstruction, which proportion of the total demand should be diverted (or removed) to ensure that travel times during reconstruction are equal to those before reconstruction? →X544 is wrong 644 10³ vehs ✔ 644 X
Peak-hour traffic demand between an origin and destination pair is initially 3500 veh/h. The two routes connecting the pairs have performance functions t₁ = 2+3 and t₂ = 4+222, where the times t₁ and t₂ are in minutes and the flows 1 and 2 and capacities c₁ and c₂ are in thousands of vehicles per hour. Initially, the capacities of routes 1 and 2 are 2500 and 4000 veh/h. A reconstruction project reduces capacity on route 2 to 2000 veh/hr. What is the flow x₁ (in thousands of vehicles) on route 1 before the reconstruction? 2.206 2.206 Assuming user equilibrium before and during reconstruction, which proportion of the total demand should be diverted (or removed) to ensure that travel times during reconstruction are equal to those before reconstruction? →X544 is wrong 644 10³ vehs ✔ 644 X
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Transcribed Image Text:Peak-hour traffic demand between an origin and destination pair is initially 3500 veh/h. The two routes
connecting the pairs have performance functions t₁
=
2+31 and t2
4+22, where the times t₁ and
t2 are in minutes and the flows ₁ and 2 and capacities c₁ and c₂ are in thousands of vehicles per hour.
Initially, the capacities of routes 1 and 2 are 2500 and 4000 veh/h. A reconstruction project reduces capacity
on route 2 to 2000 veh/hr.
What is the flow 1 (in thousands of vehicles) on route 1 before the reconstruction?
2.206
2.206
644
Assuming user equilibrium before and during reconstruction, which proportion of the total demand should be
diverted (or removed) to ensure that travel times during reconstruction are equal to those before
reconstruction?
644
-
10³ vehs
Submit
X
ЭХ 64цis wrong
»X544'5
C
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