As a result of a Portable Variable Speed Limit System installed along a construction zone in Alaska, the percentage of vehicles speeding decreased by 57 percent. Methodology A typical Before-and-After study of speed data at a particular construction zone was conducted by a research team from the Civil Engineering Department of University of Alaska- Anchorage… Content type Benefit Date Posted 04/25/2018 Taxonomy (ARC-IT) Variable Speed Limits (TM20), Reduced Speed Zone Warning / Lane Closure (VS09) Geolocation links Alaska, United States