High speed Test of Silver Volt
By
Detroit Testing laboratory, Inc.,
Report 207210 - I (B) -- July 26 ,1982

The average speed of the Silver Volt, in hybrid mode, was found to be 76 miles per hour according to test runs on Interstate Highways I-275 and I-94. The tests were made on July 23, 1982 in Dearborn, Michigan.

High Speed Test of Silver Volt - 76 mph

The full text can be found in [ Detroit Testing Lab Report '82 - B ].  Click link to open report.