Inbar

INBAR is a signal-program planning system developed by the TMRC for the Ministry of Transport, and constitutes the standard system for signal-program design in Israel.

INBAR reflects the entire life cycle of the signalized junction:

n  The initial signal-program design reflecting the priority regime defined by the transportation agencies.

n  Quality assurance procedures for verifying the implementation of the safety constrains and the priority regime principles.

n  Ongoing adaptation of signal-programs in order to meet changes in mobility patterns.

A systematic approach composed of both mathematical models and engineering considerations is implemented in INBAR. This approach enables to meet the challenge of integrating quantitative data and qualitative requirements.

Various self-developed algorithms for signal programs design, planning and quality assurance are embedded in INBAR:

n  Decomposition of signal state graph into fundamental entities, their sequence and reciprocity.

n  Stage transition optimization algorithm.

n  Automatically identification of illegal stage sequence based on safety constrains.

n   Public transport trajectory based on a car-following model.

n  Optimization model for stagger junctions design.

The models and algorithms embedded in INBAR serve as decision support tool for transportation engineers and reflect both general traffic engineering methodologies combined with Israeli guidelines for signal planning.