createVehTypeDistributions.py

Creates a vehicle type distribution by sampling from configurable value distributions for the desired vType-parameters.

Example use

 <SUMO_HOME>/tools/createVehTypeDistributions.py config.txt

The only required parameter is the configuration file in the format shown below (example config.txt):

 tau; normal(0.8,0.1)
 sigma; normal(0.5,0.2)
 length; normal(4.9,0.2); [3.5,5.5]
 vClass; passenger
 carFollowModel; Krauss

In the config file, one line is used per vehicle type attribute. The syntax is: nameOfAttribute; valueOfAttribute [; limits]

ValueOfAttribute can be a string, a scalar value or a distribution definition. Available distributions and its syntax are: "normal(mu,sd)" with mu and sd being floating numbers: Normal distribution with mean mu and standard deviation sd. "uniform(a,b)" with limits a and b being floating numbers: Uniform distribution between a and b. "gamma(alpha,beta)" with parameters alpha and beta: Gamma distribution.

Limits are optional and defined as the allowed interval: e.g. "[0,1]" or "[3.5,5.0]". By default, no negative values are accepted but may be enabled by setting a negative lower limit.

Additional options:

• --output-file configures the name of the output file to be written
• --name Name of the created distribution
• --size Number of vTypes to be sampled for filling the distribution
• --seed Set the seed for the random number generator

Retrieving parameters from measurements of individual vehicles

To obtain mean and deviation a number of values must be obtained from the data set. The following is recommenced:

• accel: the maximum (or high percentile) acceleration for each vehicle
• deccel: the maximum (or high percentile) deceleration for each vehicle
• speedFactor: the maximum (or high percentile) quotient of speed/speedLimit for each vehicle

generateTurnDefs.py

This script allows generation of the turn definitions based on the number of lanes allowing particular turns. The basic functionality distributes the traffic uniformly, that is:

1. distribute the incoming traffic uniformly across the lanes forming the road
2. distribute the amount of traffic assigned to each lane uniformly among the destinations that the lane allows turns to.
3. sum up the values for each of the destinations that the road being processed allows turning to.

Example use

 <SUMO_HOME>/tools/turn-defs/generateTurnDefs.py --connections-file connections.con.xml --turn-definitions-file output.turndefs.xml

The script allows to be extended with new traffic distribution policies (for example, based on Gaussian distribution) easily. See the DestinationWeightCalculator class for details.

The script processes the connections given in the provided *.con.xml file. For usage details, execute the generateTurnDefs.py script with --help option.