background_strategy

This data flow is used within the Manage Traffic function and comprises information about the traffic control strategies to be used if no overrides are in effect, i.e. there are no incidents, emergency vehicle routes, and no changes due to demand management or traffic system operator activity. Any of these may cause a special control strategy to be introduced and supersede the background strategy. The background strategy is specified for different times of the day, days of the week, and days of the year. Those for which a day of the year is specified will take preference over those for which a day of the week is specified, which in turn will take preference over those for which no date or day is specified. The data flow consists of the following data items each of which is defined in its own DDE:

list_size
+ list_size{strategy_start_time
+ strategy_end_time
+ strategy_day
+ strategy_date
+ selected_strategy_type
+ selected_strategy_data}


Sub Data Flows

Parent Data Flows

Associated PSpecs