US Environmental Protection Agency
15 Mar 2010 Draft WLTP test procedures (US EPA) WLTP-DTP-01-02 2010-03-15 US EPA
14 Apr 2010 Presentation: WLTP Test Procedures for Hybrid Electric Vehicle Testing (USA and US EPA) WLTP-DTP-01-12 2010-04-14 USA US EPA
14 Apr 2010 Presentation: WLTP Test Procedures for Chassis Dynamometer Testing (USA and US EPA) WLTP-DTP-01-13 2010-04-14 USA US EPA
22 Sep 2010 40 CFR 1065 N20 measurement devices (USA and US EPA) WLTP-DTP-AP-02-11 2010-09-22 USA US EPA