10/15/2026
Did you know that speed variance, the difference in speed between the fastest and slowest drivers on a road, can often be a greater predictor of crash risk than high average speeds alone?
When vehicles travel at vastly different speeds on the same corridor, lane-changing maneuvers and sudden braking events increase dramatically. Comprehensive speed distribution studies give traffic engineers the full picture beyond basic averages, providing the baseline data needed to evaluate pace speed, identify speed differentials, and design targeted safety interventions.
Don't rely on simple averages to evaluate corridor safety. In addition to mid-block segments, Quality Counts can also capture vehicle speeds directly through intersections. Partner with Quality Counts to capture high-precision speed distribution data for your next safety audit:
https://www.qualitycounts.net/