Transport modelling

Our transport models

We have developed a set of transport models which are used to inform planning applications and Transport Assessments (TA).

How we built them

These models were built to represent:

  • typical weekday ‘peak’ traffic flow, from 8am to 9am and 5pm to 6pm
  • the inter-peak period, from 10am to 4pm

Developers can apply to use our transport models to help make decisions about their own developments.

Types of models

Junction model

We've developed junction models using VISSIM modelling software. We've done this on an ad-hoc basis to consider specific capacity issues or support planning applications.

The cost of developing these models is small. As such, these models are not regularly updated or maintained.

Junction modelling is used for:

  • designing junction or network improvement
  • monitoring traffic behaviour
  • visualising journey time and queue length

Local network model

We've developed local network models to represent specific local network conditions within the towns of Buckinghamshire.

These models have been built utilising VISUM software and are used to show:

  • congestion
  • changes in routing
  • optimising traffic signals
  • analysing interaction of junctions

The models are used for assessing the traffic impact of highway schemes and new land-use development.

Countywide transport model

The countywide transport model is used to:

  • analyse major schemes
  • illustrate wider changes in flow or delay
  • export into GIS and spatial systems
  • show routing information

We input specific data into our model, such as network or survey data which will show how a new scheme or work will affect:

  • the flow of traffic
  • the speed of the traffic
  • congestion

The output of our model can be exported for economic or environmental assessment.