A Variable Speed Limit System on I-95 in in Virginia Reduced Fatal and Serious Crashes by 13 Percent. METHODOLOGY The VSL system included 24 detector stations that generated per-vehicle record (PVR) data. These detectors produced raw PVR data which included unique vehicle ID, time, detector station… Content type Benefit Date Posted 03/31/2024 Taxonomy (ARC-IT) Variable Speed Limits (TM20) Geolocation links Fredericksburg, Virginia