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T&E publishes work on designing representative vehicle tests

Sat 28 October 2017 | Back to news list

Brussels-based Transport and Environment has published a briefing about its findings based on more than 400 real-world CO2 tests, performed with Peugeot-Citroen. T&E says that road tests conducted under controlled conditions are not as reproducible as a laboratory test but do provide a robust basis for estimating real-world emissions.
 
The environmental NGO says that its briefing - 'Designing representative vehicle tests: Lessons for EU regulations' - identifies three key lessons. Firstly, that road tests conducted under controlled conditions are reproducible within a 5% deviation. 
 
Secondly, that databases of real-world fuel use and other real-world tests are a good basis for deriving real-world fuel efficiency. T&E says that the new WLTP test – which replaced the obsolete NEDC test – underestimates emissions.
 
Thirdly, the driving style in the Real-world Driving Emissions (RDE) test protocol as agreed by the EU is too passive, that the share of urban driving is seriously under-estimated and that the rules need to be revised.
 
T&E is calling on the European Commission to introduce a real-world CO2 test and a not-to-exceed limit as part of the forthcoming car CO2 regulation. The aim is to stop carmakers 'gaming' the new WLTP test and fit technology that delivers emissions reductions on the road.


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