In light of re-estimated mileage per gallon claims by Ford, Hyundai and Kia, the Environmental Protection Agency seeks to prove the claims of all automakers through real-world testings.
Automotive News reports a proposal by the agency would mandate automakers to road-test their vehicles in order to verify that the mpg claimed in the lab is achievable on the street. The proposal would also make manipulation of lab results to deliver higher figures difficult at best.
Though a number of automakers already use real-world testing, the EPA is establishing “a regulatory requirement for all automakers,” according to agency director of the Office of Transportation and Air Quality, Chris Grundler.
The test itself would become more rigorous, emphasizing air resistance and rolling friction at the test track over computer modelling.