homework_8_solution

# Homework_8_solution - FHWA Workshop over the Web for Travel Model Development Session 7 Homework Static Equilibrium Highway Assignment Total Time

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1 FHWA Workshop over the Web for Travel Model Development Session 7 Homework Static Equilibrium Highway Assignment Total Time Required: 30 Minutes In this exercise, we will perform a static equilibrium highway assignment on a really simple network. The assignment will be performed using a standard BPR formula as the volume­delay function. Background Consider the network shown in Figure 1, which may well be the simplest you have ever seen. Figure 1. Example Network In the a.m. peak period, there are 4000 trips, and they all have Zone A as the origin and Zone B as the destination. There are two possible paths between A and B, via Link 1 and via Link 2. Table 1 shows the characteristics of the two links. Table 1. Link Characteristics Link Length (miles) Free flow speed (mph) Capacity (vehicles in period) Free flow travel time 1 10.0 50 2500 2 10.0 40 2000 Link 1 Link 2 Zone A Zone B

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2 We will perform a most of the functions of a six­iteration static equilibrium highway assignment for this network and “trip table.” Remember, in each iteration an all­or­ nothing assignment is performed, and the results of all iterations are averaged using weights. The standard BPR formula, with the original parameters, is used:
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## This note was uploaded on 04/26/2011 for the course TM 811 taught by Professor Charlie during the Spring '11 term at NYU Poly.

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Homework_8_solution - FHWA Workshop over the Web for Travel Model Development Session 7 Homework Static Equilibrium Highway Assignment Total Time

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