Overview

This Function shall be capable of providing the following facilities:

(1) The output of data about current traffic conditions in the urban road network received from the Urban Traffic Data Management Function and data about speed limits and lane use received from the Manage Urban Traffic Speeds and Headways and Manage Urban Road Network Lanes Functions respectively.
(2) Both sets of outputs shall be sent as soon as new data is received to functionality in the Provide Support for Host Vehicle Systems, Provide Support for Cooperative Systems, Provide Electronic Payment Facilities and Provide Traveller Journey Assistance Functional Areas, plus the Broadcast and Traffic and Travel Information Provider.
(3) Both sets of outputs shall also be sent as soon as new data is received to the Broadcaster and Traffic and Travel Information Provider, or to the Broadcaster when it provides a request.

Functional Requirements

(a) continuously monitor for the receipt of the any of the input data flows
(b) when the data flow urban traffic information request is received in (a), output the current traffic information to the broadcaster using the data flow containing urban traffic data
(c) when the urban traffic data for output data flow is received in (a), store its contents locally updating any previously received data that has been changed
(d) when (c) is complete, output the revised version of the urban traffic data to functionality in other Functional Areas, the broadcaster and the traffic and travel information provide in the appropriate output data flows
(e) when either the urban lane instructions or the urban speed limit changes data flows are received in (a), repeat (c) and (d) for the data that they contain.

Diagrams

Parent Higher Level Function

• 3.1.1 Provide Urban Traffic Management

Input logical dataflows

• fesp.b-urban_traffic_information_request
• mt_urban_lane_instructions
• mt_urban_speed_limit_changes
• mt_urban_traffic_data_for_output

Output logical dataflows

• mt.pepf_urban_traffic_conditions_CSF
• mt.pepf_urban_traffic_conditions_CUR
• mt.pscs_current_urban_traffic_conditions
• mt.pshvs_urban_network_perturbations
• mt.pshvs_urban_queue_information
• mt.ptja_urban_network_conditions
• mt.ptja_urban_network_perturbations
• tesp.b-urban_traffic_data
• tesp.ttip-urban_traffic_data

User needs