Road safety analysis Super Eco Combi

The Netherlands is investigating whether the deployment of an extra-long and heavy truck combination (Super Eco Combi) can be done safely by analysing risks, measurement methods, and suitable routes in a practical pre-test. TML coordinates the traffic safety analysis of this test and translates technical data into policy-relevant insights.

The Netherlands intends to experiment with the so-called ‘Super Eco Combi’ (SEC) trucks — extra-long truck combinations measuring up to 34 metres and weighing a total of 72 tonnes. While a standard tractor-trailer is typically 16.5 metres long with a maximum weight of 40 tonnes, longer combinations of up to 25.25 metres and 60 tonnes have already been in use for some time on parts of the road network in the Netherlands and in several Scandinavian countries.

Longer and heavier trucks are more efficient than conventional trucks because they can transport more cargo in a single trip, reducing the number of journeys and associated emissions. However, before such a trial can take place on public roads, it must first be determined whether this can be done safely.

This pre-test is designed to explore potential risks; how these can be measured; and which routes are suitable or unsuitable. The pre-test will be conducted in real traffic conditions using a custom-made truck combination.

TML coordinates the road safety analysis, working alongside technical partners who provide measurement equipment for the test vehicle. Drawing on our experience with similar studies – covering crash analysis, driving behaviour, and telematics-based monitoring – we support the risk assessment and pre-test planning. We translate technical data into actionable insights to guide the next steps of the pilot.