Modeling traffic demand with origin-destination matrices

An OD matrix defines the travel demand based on the number of trips between the zones (Defining an origin-destination matrix). The zones are the starting points and end points of the trips. The number of trips applies to each pair of districts for a given time interval. You define the time interval in the matrix attributes (Matrix attributes). You edit the number of trips of the OD matrix in the matrix editor (Editing OD matrices for vehicular traffic in the Matrix editor). Origin-destination matrices are also called OD matrices, demand matrices or trip matrices.

You can specify multiple origin-destination matrices for a simulation with dynamic assignment. Each origin-destination matrix can contain a different vehicle composition or apply to a different time interval. The time intervals can overlap arbitrarily because the traffic generated at any time is always the result of the total traffic from all matrices that include this point in their validity interval.