4.3 System Architecture

The second phase of the Catalyst methodology calls for the development of an architecture for the system.

The CHART II architecture developed by the CSC/PBFI Team builds upon the distributed approach established as a result of the Maryland Telecommunications Analysis effort that is now being implemented under the Maryland Network Management Services contract. It will completely preserve MDSHA’s investment in this area.


In this section, we will explore the system architecture proposed by the CSC/PBFI Team for the CHART II system. This technical discussion uses industry, international standards and commercial-off-the-shelf (COTS) software terms and language. As you will see, we have given the system architecture much thought, have documented it thoroughly, and together with MDSHA are prepared to hit the ground running to deploy leading edge technology solutions.

The CSC/PBFI Team system architecture integrates guidance offered by the National ITS Architecture and architectural features unique to the State of Maryland. The CHART II database schema has been developed using the latest information from the Traffic Management Data Dictionary (TMDD) national ITS standard development effort. The Field Management Station (FMS) architecture is based on early California Department of Transportation (CalTrans) work that describes a generalized distributed field device controller. The FMS architecture is predicated on the use of a National Transportation Communications for ITS Protocol (NTCIP) Simple Network Management Protocol (SNMP) interface.

MDSHA CHART II requirements have been accommodated in the architecture elements described in the following sections.