This data flow comprises data about each segment in the road (surface street) network and the way in which they fit together, i.e. which segment is joined to which, both upstream and downstream, plus identification of those links that interface to the highway network. It consists of the following data items each of which is defined in its own DDE:

+ list_size{route_segment_downstream_identity
+ route_segment_end_point
+ route_segment_identity
+ route_segment_start_point
+ route_segment_upstream_identity
+ turning_movements}

Sub Data Flows

Parent Data Flows

Associated PSpecs/Terminators