Automated convoys

January 24th, 2012 - Joe Duarte

A lead truck followed by three cars, driven entirely autonomously at speeds of up to 90 km/h.

Volvo-road-trainVolvo road train project in final phase

Volvo is trying to set aside the notion that tailgating is not only not as dangerous as it’s made out to be, but might actually be beneficial to the environment.

The SARTRE project (which stands for Safe Road Trains for the Environment) has successfully completed the first test demonstrations of a multiple vehicle platoon made up of a lead truck followed by three cars, driven entirely autonomously at speeds of up to 90 km/h – with no more than 6 metres (just over a car length) between them.

“The aim is for the entire road train to be completed in autumn 2012. By then we will have four vehicles after one lead vehicle driving at 90 km/h,” says Erik Coelingh, technical project manager at the Volvo Car Corporation.

The SARTRE project is being driven by seven European partners and is the only one of its kind to focus on the development of technology that can be implemented on conventional highways.

The main benefit of a road train is energy savings (expected to be in the 20% range), since the vehicles follow close to each other and benefit from the reduced air drag. The main stumbling point is expected to be safety concerns, though the idea of a leading truck, which has increased reaction times and distances, is technically sound when followed by cars that can react to changes in speeds quite easily when those systems are all controlled by computer. Also, road capacity will be better used, reducing congestion.

As part of the project, as study is also under way to identify what infrastructure changes will be needed to make road trains a reality. The study will involve discussions with governments, traffic safety researchers and other technical experts. Among the topics up for debate is the need for a common terminology, such as defining what constitutes a fully-automated (as opposed to partially- or highly-automated) which could compromise the safety of the convoy. National regulatory laws will also need to be harmonized.

Started in September 2009, the SARTRE project is partly funded by the European Commission under the Framework 7 programme, is led by Ricardo UK Ltd (a technology provider) and comprises collaboration between the Volvo Car Corporation, Idiada (auto engineering and testing specialists) and Robotiker-Tecnalia (automation specialists) of Spain, Institut fur Kraftfahrwesen Aachen (IKA) of Germany (auto research), and SP Technical Research Institute of Sweden. More information is available at http://www.sartre-project.eu/.

 

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