Feature Request - New Data Fields for Restricted Turn

[asu-trans-ai-lab]

Feature Description:
We propose to introduce two new data fields in the link.csv and link_performance_scenario_...csv files to better manage restricted turn nodes. This can improve traffic flow management and congestion control.

How It Works:

link.csv File:

New Field: restricted_turn_nodes_p1
Purpose: Represents nodes where left turns and possibly U-turns are prohibited, improving traffic flow and managing congestion during specified periods.
Example: For a left-turn movement from node 41 to 40, then to 464, record the value '464' in restricted_turn_nodes_p1 for the link node 41 to 40.
link_performance_scenario_...csv File:

New Fields: restricted_turn_nodes and auto_turn_volume
Purpose: Display restricted turn nodes specified by the user for a particular demand period, and the corresponding auto mode turn volume.
Note: auto_turn_volume presents data as node_id: turn volume, where 'node_id' is the ongoing node id from the current line.
Example Usage:

If node 464 is restricted during the 'AM' period (displayed in the restricted_turn_nodes field), there might be no volume in auto_turn_volume. However, if you remove node 464 from restricted_turn_nodes_p1 for the link node 41 to 40, auto_turn_volume in the link_performance_scenario_...csv will display 186:4, indicating an allowed movement from node 41 to 40 to 186, with an auto volume of 4 vehicles.

Additional Context:

An empty auto_turn_volume field does not necessarily indicate a turn restriction, it could simply be no volume for that turn due to the nature of the OD demand and traffic assignment.