The collection of existing travel data

Abstract

Existing tripmaking or travel data may conveniently be classified into four groups according to the origin and the destination of the trip being considered. These four classes of movement are:

• (a) trips which have an origin within the external cordon and a destination outside the external cordon;

• (b) trips which have both an origin and a destination within the external cordon;

• (c) trips which have an origin outside the external cordon and a destination within it;

• (d) trips which have neither origin nor destination within the external cordon but which pass through it. Reference