Assign the base O-D matrix developed in Task 5.1 to your network via User Equilibrium Assignment (UE). After an initial All-or-Nothing (A-o-N) Trip Assignment is made on initial minimum paths, the solution procedure iteratively applies (a) capacity-restained link performance functions, (b) the minimum path algorithm, and (c) an All-or-Nothing (A-o-N) Assignment. A line search using the current and prior assignments is used to find the next set of network flows. Report link volume/capacity (V/C) results; plot directional volumes and V/C ratios.
5.2.1 Perform Traffic Assignment
Assign and report the final PM-peak vehicle-trip O-D matrix to the Miasma Beach highway network using User Equilibrium Assignment. Be sure that the O-D matrix includes identified external trips.
If assistance is needed in executing traffic assignment, then Click HERE.
5.2.2 Evaluating the Assignment Results
Traffic Assignment provides the flows (volume and travel time) on each direction of a link. A link's A-node and B-node must be identified to know to which direction AB_Flow (or BA_Flow) refers. This node information should be added to each link in the Highways/Streets layer.
To append direction information to links, open the Highways/Streets layer and Click on the [New Dataview] button to open its dataview table. Go to Dataview / Formula Fields. Click Node Fields to display the Node Formula Fields dialog box. Select ID under node fields and "From and To" under Options; click OK. The "to" and "from" nodes should appear in the dataview. Save the joined dataview of Highways/Streets + TASSIGN as baseasgn.dvw.
The tcw_rep.txt contains much information, including
