Mercurial > hg > nsaunier > traffic-intelligence

comparison python/traffic_engineering.py @ 479:7828fec8bbd2

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
added function to generate headways based on flow or mean headway over some simulation period
author Nicolas Saunier <nicolas.saunier@polymtl.ca>
date Mon, 31 Mar 2014 16:20:13 -0400
parents 539e2b4cfaa3
children 850ed17c7b2f
comparison
equal deleted inserted replaced
478:d337bffd7283 479:7828fec8bbd2
9 9
10 10
11 ######################### 11 #########################
12 # Simulation 12 # Simulation
13 ######################### 13 #########################
14
15 def generateTimeHeadways(meanTimeHeadway, simulationTime):
16 '''Generates the time headways between arrivals
17 given the meanTimeHeadway and the negative exponential distribution
18 over a time interval of length simulationTime (assumed to be in same time unit as headway'''
19 from random import expovariate
20 headways = []
21 totalTime = 0
22 flow = 1/meanTimeHeadway
23 while totalTime < simulationTime:
24 h = expovariate(flow)
25 headways.append(h)
26 totalTime += h
27 return headways
14 28
15 class Vehicle: 29 class Vehicle:
16 '''Generic vehicle class 30 '''Generic vehicle class
17 1D coordinates for now''' 31 1D coordinates for now'''
18 class PredictedTrajectory1D(prediction.PredictedTrajectory): 32 class PredictedTrajectory1D(prediction.PredictedTrajectory):