First Experiment: Compute Basic Performance Measures
The purpose of this first experiment is to run the computer program LEAM
and compute the basic performance measures of flow rate (throughput) q,
mean travel time, T, and the average number of vehicles, the traffic volume
V along the highway segment of length L miles and fixed number of lanes
N and an input flow rate . The program requires you to input the maximum
vehicle speed in mph and the maximum jam density.
input flow rate vph
Maximum vehicle speed (mph)
Maximum jam density
Record the outputs: q, T, V, pc, ρ.
The blocking probability Pc is an extra output
measure which quantitatively measures
the congestion on the highway segment. This probability ranges from
a low of 0 to a high of 1. A low value of 0 indicates very little blocking
along the highway segment, while a value close to 1 represents significant
congestion and basically the roadway traffic coming to a halt. Another performance
measure output is ρ which measures the
percentage utilization of the capacity of the highway segment.
Animation of Highway segment
Experiment 1: Please run the LEAM model for a sample
highway segment. Now take your first experiment and record what happens
when input flow rate \Lambda is increased in increments of say 1000 vph?
Please graph the effects on a separate piece of paper.