Overview

This Function shall be capable of providing the following facilities:

(1) The collection of traffic flow data from sensors that are located within the urban road network managed by the System.
(2) The sensors shall  be capable of detecting the presence of all types of road Vehicle, from Bicycles to Heavy Goods Vehicles.
(3) The processing of the raw input data provided by the sensors into actual traffic flow data, i.e. vehicle flow rates, vehicle speeds, etc.
(4) The supply of the processed raw input data to other functionality in the Manage Traffic Functional Area for collation and use.

Note that this Function shall not collect any data directly from Vehicles.  It shall assume that all Vehicles are passive and not capable of providing data themselves.

Functional Requirements

(a) the presence of the trigger input data flow shall be continuously monitored
(b) the analogue data representing raw traffic flow data obtained in (a) shall be processed into digital data such as, but not limited to, flow, speed, occupancy, headway, vehicle classification, and queue
(c) the data for each point in the urban road network at which it was produced shall be kept separate
(d) the trigger output data flows, shall be used to send the data in (c) to the urban road network traffic control and data management Functions.

Diagrams

Parent Higher Level Function

• 3.1.1 Provide Urban Traffic Management

Input logical dataflows

• ftrfc-urban_traffic_flow_data

Output logical dataflows

• mt_collected_urban_traffic_data
• mt_urban_current_traffic_data_for_demand
• mt_urban_traffic_data_for_incident_detection
• mt_urban_traffic_flow_management_data

User needs