Traffic Modelling

Traffic modelling involves the use of specialist software that demonstrates how a highway junction or network will cope with specific levels of demand, such as the number of vehicles wanting to get from A to B, or the number of pedestrians wanting to cross a carriageway.

The requirements for traffic modelling are many and varied. It is predominantly used to assess the effects of increased vehicle traffic on a junction or highway network as a result of a proposed development, but it can also be utilised for appraising proposed highway schemes.

Traffic models make it possible to determine how highway networks will cope with predicted traffic movements over time, so that mitigation measures can be planned and implemented before any significant issues arise.

Different software is utilised depending on the type of traffic modelling required, whether it be a single roundabout or a city wide network.

Cole Easdon are proficient with the use of numerous programs including; ARCADY, PICADY, LINSIG, TRANSYT, SATURN and PARAMICS.

The Benefits

  • It provides the traffic information required to help secure planning permission for a development
  • It can be used to evaluate options to determine the one which gives the lowest congestion and pollution
  • It can be used to optimise signal timings to maximise the operating efficiency of signal controlled junctions thereby reducing congestion
  • It can be used to determine the design of appropriate minor highway improvements to existing priority junctions and roundabouts to provide additional vehicular capacity

How We Can Help

Cole Easdon Consultants are able to undertake the following types of traffic modelling:

  • Roundabout Modelling: Predicting capacity, queues and delays at at-grade, grade-separated and mini roundabouts. Predicting roundabout capacity improvements that are achievable via highway works, such as approach road widening
  • Priority Junction Modelling: Predicting capacity, queue lengths and delays at non-signalised major/minor priority junctions, such as T-junctions, crossroads and staggered crossroads. Predicting junction capacity improvements that are achievable via highway works, such as increasing the available visibility envelope for drivers
  • Traffic Signal Control Modelling: Predicting capacity, queue lengths and delays at signalised junctions, including signalised roundabouts, allowing creation of a set of optimum signal timings for each junction or a set of linked junctions. Predicting signalised junction capacity improvements that are achievable via, for example, manipulation of signal phases and stages, or lane re-configuration
  • Micro-Simulation Modelling: Modelling of complex highway junctions and networks, which can provide a visual representation of how the junction/network will operate under different scenarios
  • Pedestrian Modelling: Modelling the delay to both vehicles and pedestrians resulting from the provision of road crossing facilities

Examples of Our Work

Walton Hospital, Liverpool: Detailed signal junction analysis for the new access arrangement to serve the redevelopment of an existing hospital site. The redevelopment included new highway and footways, whilst maintaining access for the remaining hospital functions.

Queensway, Lytham St Annes: Traffic modelling as part of a Transport Assessment, in support of a 1,150 dwelling residential development, including diversion of existing traffic along a new ‘link road’ that was being funded by the development.

The Schools of King Edward the Sixth, Birmingham: Assessment and analysis for the introduction of a new Pelican Crossing to serve the school, across a dual carriageway section of Bristol Road.

Faringdon, Oxfordshire: Feasibility study of four potential development sites on the outskirts of Faringdon for residential, retail and employment. The traffic modelling highlighted the required mitigation measures for various development scenarios.

Ricoh Arena, Coventry: Travel Risk Assessment including detailed computer modelling of pedestrian movements for major events at a 33,000 seat stadium.

Olympic Equestrian Events, Greenwich: Extensive modelling of a number of signalised and priority junctions to examine the impact of the predicted traffic movements generated by the 2012 events, on the operation of the local highway network. More…

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