Speed

The Speed Virtual Cost implementation
Description

A speed based virtual cost is applied for making the trip from a zone to the first modelled node that has an equivalent in the real-world, i.e., a physical node. The same holds for a movement in the opposite direction, i.e., from an eligble physical node to a zone. This cost is regarded as virtual since it does not utilise any real-world infrastructure.

The user can configure the fixed speed that is applied to determine the cost to via this class. The actual cost is then computed based on the distance between the zone and the connectoid i.c.w. the chosen speed.

Defaults

Name Default Type Unit
speed value 25.0 float Kilometres per hour (km/h)

Methods

Speed virtual cost exposes the following methods

Name Description
.set_connectoid_speed(+) Override the default fixed speed

Properties

This class has no properties (yet)

Example 1

from planit import *

# choose to run PLANit with a traditional static traffic assignment method
planit_instance = PLANit()
planit_instance.set(TrafficAssignment.TRADITIONAL_STATIC)

# set virtual cost to SPEED
planit_instance.assignment.set(VirtualCost.SPEED)

# override the default fixed speed (km/h) 
planit_instance.assignment.virtual_cost.set_fixed_connectoid_cost(50.0)

See also

Traffic assignment on assignments that support this virtual cost implementation
VirtualCost.<enum> for all available virtual cost options
VirtualCost landing page for all available virtual cost implementations

Source code

Class VirtualCostWrapper in Wrappers.py

.set_fixed_speed(+)

A Fixed virtual cost method

Last modified January 1, 0001