Various studies use new West-Brabant transport model

4 September 2019

The Brabant-Wide Modelling Approach (BBMA2018) is a regional transport model constructed for the Dutch province of Noord-Brabant. It consists of an umbrella model for provincial studies and four regional transport models for municipal studies. The transport model has been operational for each of the four regions ((West, Centre, North East, and South East) since a few weeks now. This contribution focuses on the WEB model for West-Brabant.

This model was immediately used by four municipalities (Breda, Etten-Leur, Geertruidenberg, and Oosterhout) in a variety of studies. Subjects covered included:

  • Recalibration of the base year due to more recent counts becoming available and adjusting the forecast for 2030
  • Scenarios with changed assumptions about residential construction developments and the impact on traffic flows
  • Alternative network options for the reopening of a through road
  • Identifying origin and destination traffic with selected links

The city of Breda has conducted a large number of modelling studies over the last few years. Consultant Rogier van der Honing: “That's why they have an interest in a high-quality, up-to-date transport model. The city has carried out many counts in the past few years. These show that the counts on the north circular increased by around 10% in the period 2015-2018.”
The BBMA2018's base year is 2015. The forecast for 2030 is based on that base year (2015). The higher the volumes in the base year, the higher the volumes in the forecast. Because of this strong increase in counts in 2015-2018, the forecast for 2030 was underestimated. “That's why we've recalibrated both the base year, from 2015 to 2018, and the 2030 forecast year for the city of Breda.”

The quality of the Breda transport model. We conducted a comparison of the modelling and count values around Breda's north circular.

The town of Etten-Leur has drawn up several residential development plans for 2015-2030. Rogier van der Honing: “Without these extra homes, the town is already facing a number of problems.” To be able to deal with the increase in traffic triggered by the new developments, Etten-Leur has commissioned a study to locate those problems. “We're looking at the impact of those new developments on traffic flows by carrying out junction analyses.”

Road types in Etten-Leur. This network forms the basis for the study that is being carried out in Etten-Leur.

The Keizersdijk road in Raamsdonksveer (municipality of Geertruidenberg) has been closed to through traffic. Traffic coming from the south can no longer travel north through town. The municipality wants to investigate the impact of reopening Keizersdijk. Rogier van der Honing: “We fine-grained and improved the road network around Keizersdijk in order for the volumes to accurately reflect the recent counts. Then we drew up various alternatives to the reopening of Keizersdijk.”

Speeds along Keizersdijk in Raamsdonksveer. The structure was changed between 2015 and 2019. We've improved the network as part of this study.

Bredase Bridge crosses over Molenpolder Road in Oosterhout. The municipality wants to investigate the impact of a new link between the two roads. Goudappel Coffeng has drawn up a proposal for the new link. Rogier van der Honing: “To gain a better understanding of the traffic that would use the new link we've calculated a selected link.”

The The town of Oosterhout wants to investigate the impact of the construction of a link between Bredase Bridge and Lage Molenpolder Road. The illustration shows the road types (area access roads) and types of junction.


Client: BBMA West-Brabant (WEB)
Year: 2018-2019