Time-speed data points

The US06 Supplemental Federal Test Procedure (SFTP) was developed to address the shortcomings with the FTP-75 test cycle in the representation of aggressive, high speed and/or high acceleration driving behavior, rapid speed fluctuations, and driving behavior following startup.

Vehicle speed over the US06 test is shown in the following chart.

[chart]

Figure 1. SFTP US06 Cycle

The cycle represents an 8.01 mile (12.8 km) route with an average speed of 48.4 miles/h (77.9 km/h), maximum speed 80.3 miles/h (129.2 km/h), and a duration of 596 seconds.

Since model year 2008, the US06 results are also used for the determination of the EPA on-road fuel economy ratings using the EPA 5-cycle method.