This data flow comprises data about each segment in the road (surface street) network and highway 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 from road to highway network. The data flow consists of the following data items each of which is defined in its own DDE:

+ route_segment_details
+ link_data_for_guidance

Sub Data Flows

Parent Data Flows

Associated PSpecs