On May 28, 2019 the National Highway Traffic Safety Administration (NHTSA) proposed an Advanced Notice of Proposed Rulemaking (ANPRM) and is seeking public comment on testing and verifying compliance with existing crash avoidance (100-Series) Federal Motor Vehicle Safety Standards (FMVSSs). Also on May 28, 2019, the Federal Motor Carrier Safety Administration (FMCSA) issued an ANPRM and is seeking public comment addressing the Federal Motor Carrier Safety Regulations (FMCSRs) that may need to be amended, revised, or eliminated to facilitate the safe introduction of Automated Driving Systems (ADS) equipped Commercial Motor Vehicles (CMVs).
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On 17th May 2019, the European Commission published a draft Regulation introducing "Step E" of the Euro VI heavy duty emissions requirements. The two main amendments being proposed as part of "Step E" relate to the portable emissions measurement system (PEMS) testing requirements. The first amendment introduces requirements for the cold start emissions to be included in the evaluation of the final emissions results and the second one requires particulate matter (PM) numbers to be measured during PEMS testing.