Final answer:
DOT and NHTSA updated the view on EMS in 1996 by proposing amendments to the Federal Testing Procedure to improve the correlation of fuel economy and emission estimates with real-world reports.
Step-by-step explanation:
DOT and NHTSA updated the view on EMS (Emissions Monitoring Systems) in 1996. The EPA proposed updating the Federal Testing Procedure to add a new higher speed test (US06) and an air-conditioner test (SC03) to improve the correlation of fuel economy and emission estimates with real-world reports. This updated testing methodology was implemented with model year 2008 vehicles and set the precedent of a 12-year review cycle for the test procedures.