Model Systems Engineering Documents for Central Traffic Signal Systems

Configure TSS

This validation case will validate the user needs associated with configuring the TSS. The TSS Manager's user needs of configuring user permissions as well as allowing a set number of users with TSS access with arbitration of user requests for access will be validated. In addition, validation of the ability of the TSS User to enter and store information about the TSS and TSS Field Equipment characteristics will be covered by this validation case. This validation case also covers TSS and ASCT failure and fallback.

4.1

System Configuration

Managing the Signal System and Field Device Database

This validation case will validate the user needs associated with managing the traffic signal system and field device database. The user needs are grouped by general database development and general database management.

4.2

Managing Signal System and Field Device Database

TSS Control

This validation case will validate the user needs associated with TSS control including coordination (by time of day, local schedule, central schedule, manual command, external control, or traffic responsive selection of pattern), simulating controller inputs, central priority and preemption, and controller time clock resynchronization.

4.3

TSS Control

Adaptive System Operations

This validation case will validate the user needs associated with adaptive system operations. The user needs are grouped in the following categories: Adaptive Strategies, Adaptive Monitoring and Control, Adaptive Coordination across Boundaries, Adaptive Queuing Interactions, Adaptive Accommodation of Pedestrians, Adaptive Accommodation of Preemption and Priority, Non-Adaptive Situations, Adaptive System Responsiveness, Adaptive Complex Coordination and Controller Features and Adaptive Alerts.

4.4

Adaptive System Operations

Traffic and Operational Performance Measurement, Monitoring and Reporting

This validation case will validate the user needs associated with traffic and operational performance measurement, monitoring and reporting. The user needs are grouped in the following categories: Logging and reports; alarms and alerts; performance measurement, analysis, and reporting; and real-time monitoring.

4.5

Traffic and Operational Performance Measurement, Monitoring, and Reporting

Data Storage

This validation case will validate the user needs associated with data storage. The primary user need if for the TSS Operator to access the data stored by the TSS for a specified period of time after which it will be archived.

4.6

Data Storage

Constraints

This validation case will validate the user needs associated with constraints imposed on the TSS design. The TSS Designer may be constrained to using particular equipment, communications, protocols and software in particular environmental conditions within a specified project budget.

4.7

Constraints

Training

This validation case will validate the user needs associated with TSS/ASCT training. All staff involved in operations and maintenance will be trained on TSS, ASCT and ATSPM as appropriate for the procured system.

4.8

Training

External Interfaces

This validation case will validate the user needs associated with external interfaces to adjacent systems. System clock synchronization, coordinated and compatible signal timings, sharing of signal operational data with external systems, external system control, and control of external devices such as signs are some of the user needs validated by this case.

4.9

External Interfaces

Maintenance

This validation case will validate the user needs associated with making sure the system meets all needs during the life of the system. The ability to repair faults and keep the software and software environment updated is covered by this validation case. Validation of the needs of the TSS Maintainer to safely maintain the TSS Field Equipment will also be covered by this validation case.

4.10

Maintenance, Support and Warranty