Brabant In-Car II: Contrast

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Brabant In-Car II: Contrast
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General information
Type: Field operational test
Tested system/service: Intelligent Speed Adaptation
Countries: The Netherlands  ? test users
3 partners 78 vehicles
Active from 06/2011 to 12/2012
Bastiaan Krosse
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Part of Dutch Project: Brabant In-Car II

The aim of the experiment is to show the potential of cooperative systems in an environment as real as possible. We chose to demonstrate in this project an application which reduces the congestion problem on Dutch motorways. The application is especially meant to solve the ghost traffic jams. ‘Shockwaves’ and ‘harmonica-effects’ in traffic flows often lead to ghost traffic jams. These traffic jams are caused by sudden breaking or lane-changes and the reactions to this by traffic participants behind. Most of the time the cause of the traffic jam is unclear for road users.

Normally road users only anticipate on the vehicle immediately in front. Through communication with an in-car system the drivers have the ability to anticipate on the behaviour of the drivers several vehicles ahead. This possibility will improve the traffic flow and reduce the ‘harmonica-effect’. The road capacity will increase. To determine the effect of the communication between vehicles a large amount of vehicles is necessary. The experiments are performed on a highway consisting of multiple lanes. The effect is measured using camera’s situated along the highway.

In this project the drivers are supported by giving them an optimal speed advise. This optimal speed advise can be formulated for each car individually, depending on the local traffic status.

By using camera’s and floating car data we know exactly where, when and how our connect vehicles are driving, … including all other vehicles on this highway. We also use a real time tracking system at the intersection.

Details of Field Operational Test

Start date and duration of FOT execution

June 2012 – December 2012

Geographical Coverage

A270 highway between Deurne and Helmond, the Nehterlands

Link with other related Field Operational Tests


To reduce traffic jams.

To drive efficiently

To improve safety of vulnerable road users (pedestrians, Cyclists).


Communication: 802.11p can be used as a local ad-hoc network which is very fast: 88% of the messages have a delay less then 2 s.

3G can be used as global network, it is not so fast: 36 % of the messages have a delay less then 2 s, 29% have a delay between 3 and 5 s, 34% have a delay more then 5 s.

Behaviour: Acceleration (and deceleration) is lower with advice at all intersections, A270 highway and Eindhoven trajectory.

Improved smoothness of traffic flow Reduction in CO2 emissions

Lessons learned

Enthusiasm from volunteers /drivers. A lot of valuable feedback for future developments.

Good cooperation between partners

SW application worked good.

Variable performance of GPS signal has negative effect on performance of application

A lot of valuable data collected, more data would be desirable (reduce σ)

Main events


Summary, type of funding and budget


€ 1.500.000,-


€ 600.000,-


€ 900.000,-

Cooperation partners and contact persons

  • Public Authorities:
    • The cityregion Eindhoven,SRE Samenwerkingsverband Regio Eindhoven
    • Ministry of Infrastructure and the Environment
    • Province Noord Brabant
  • Industry
    • Vehicle Manufacturer:
    • Supplier:
  • Users:
  • Universities:
  • Research Institutes:
  • Others (specify):

Applications and equipment

Applications tested


Equipment carried by test users


Peek traffic solutions



Test equipment


Pre-simulation / Piloting of the FOT

Method for the baseline

Techniques for measurement and data collection

Recruitment goals and methods

Methods for the liaison with the drivers during the FOT execution

Methods for data analysis, evaluation, synthesis and conclusions

Sources of information

CompanyTNO +
ContactBastiaan Krosse +
CountryThe Netherlands +
EndedDecember 2012 +
Is type ofField operational test +
NameBrabant In-Car II: Contrast +
Number of partners3 +
Number of vehicles78 +
StartedJune 2011 +
Tested system or serviceIntelligent Speed Adaptation +
Website +
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