Variable Speed Limits

Variable Speed Limits (VSL) use real-time data to adjust posted speed limits based on current road, traffic, and weather conditions. By dynamically managing speeds, these systems help drivers respond safely to congestion, work zones, and hazards like fog, snow, or ice. VSL improves traffic flow, reduces crashes, and supports safer travel for everyone—especially in changing or challenging roadway environments. Through Intelligent Transportation Systems (ITS), agencies are using VSL as part of broader safety and traffic management strategies. Explore executive briefings, data visualizations, and a case study to see how VSL enhances safety, improves traffic flow, and supports smarter roadway management through real-time adjustments.