The main objective of the current study was to explore and propose new sound level limits at a Euro 5 step of L-category vehicles, taking into account the evolution of sound levels of approved vehicle types, the citizens' needs, and the technical and economic feasibility in the medium term range.

For on-board diagnostics (OBD) requirements in the Euro 6 Light Duty vehicle legislation, the detection of emission reduction system failures against the particulate OBD threshold limits (OTL) is of major importance. The OBD thresholds set out in Commission Regulation (EC) 692/2008 and amended...