http://www.avt.nrel.gov/overview.html

The primary goal of the Advanced Vehicle Testing Activity (AVTA) is to benchmark and validate the performance of light-, medium-, and heavy-duty vehicles that feature one or more advanced technologies, including:

Internal combustion engines burning advanced fuels, such as 100% hydrogen and hydrogen/compressed natural gas-blended fuels
Hybrid electric, pure electric, and hydraulic drive systems
Advanced batteries and engines
Advanced climate control, power electronic, and other ancillary systems.

Hybrid Test Page:

http://avt.inel.gov/hev.html

2004 Prius Accelerated Reliability and Fleet Results http://avt.inel.gov/tpfart04.html

2003 Prius Accelerated Reliability and Fleet Results http://avt.inel.gov/tpfart.html

2003 Prius Road Test Results http://avt.inel.gov/pdf/hev/toyota_prius_final.pdf