The systems supporting the operation of a TMC are of two types:
- Systems directly related to the centre’s functions, including:
- network monitoring
- incident management
- traffic control
- traffic information.
- Enabling systems, which support the TMC functions, including:
- human/machine interface
- video control for CCTV network
- traffic data handling
- activity scheduling
- fault management
- web site management
- databases of spatial, temporal, event, transport and infrastructure related information
- GIS applications.
The number and diversity of applications and systems supported highlight the need for an effective system integration strategy in a TMC. One element of such a strategy is a common user interface system for the variety of traffic management applications supported in a TMC. The Traffic Management Interface System (TMIS) deployed in centres in New South Wales and Victoria is an example. TMIS provides a user configurable map-based interface for traffic management software applications, displaying information from these applications such as site status, fault alarms, locations of congestion, CCTV images and incidents.
In larger centres, TMC functions will be seen as mission critical in maintaining efficient traffic flow, and the need for formal disaster recovery plans will be an issue for consideration. Disaster recovery plans may, from a systems point of view, involve consideration of:
- the criticality of the system
- the need for redundancy (at hardware, system, services, functional and facility levels)
- the need for fail-safe operation of systems with a safety dimension
- the option of back-up power supplies:
- uninterruptible power supplies with stand-by generating capacity for critical systems and facilities
- battery back-up for low power systems.
Note that these considerations can also apply to equipment in the field.