JCT Consultancy was formed in the 1980s to develop and market the LinSig software package for Traffic Signal Design and to provide specialist traffic signal related consultancy advice to local authorities, consultants and central government. Since then further traffic engineering software products have been developed, and a comprehensive programme of training courses has been set up both to support the software and to teach general traffic signal design techniques. Still based in the historic City of Lincoln, JCT now employ a team of traffic engineers and software engineers who combine to provide world-class engineering services.
LinSig 3 is a major new version of LinSig and has been available since mid 2009. It adds many new features and extends the software in a number of significant directions. Since its original release in 1985 LinSig has been the UK industry standard software for the assessment and design of traffic signal junctions. Its unique attribute was and still is the combination of both traffic and controller modelling for comprehensive traffic signal design. The software has been instrumental in advancing UK phase (signal group) based methods of control giving maximum safety and efficiency for all road users.
One common application of LinSig is rapid testing of new traffic signal schemes which involve large numbers of alternative options. LinSig allows different options to be quickly modelled and rejected or taken forward possibly to more detailed resource intensive modelling such as microsimulation. Other common uses of the software include the interactive design of signalled roundabouts for which it is strongly established in the UK and overseas, transport assessments for land development and detailed modelling of networks of signal, priority and roundabout junctions.
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