Now they're into the thousands. Also, the short shutter speed can be utilized to produce multiple exposures on a single video readout frame. With older digital video technology, tires had to be rolled slowly with a special machine because of the standard 30-Hz frame rate. Such methods were unable to duplicate high-speed dynamics of a moving vehicle. However, tests are limited by the amount of film, camera loading, and processing which slows tests and analysis.
Engineers can also repeat or modify tests with minimal delays.