Authors
De Leonardis, D., Huey, R., & Green, J.
Publisher
National Highway Traffic Safety Administration
Website Section
Driver Behaviors
Methods
Field survey
Abstract
A field survey was conducted during the summer of 2015 that was highly similar to efforts undertaken in 2007 and 2009. The goal was to measure travel speeds and prepare nationally representative speed estimates for all types of motor vehicles on freeways, arterial highways, and collector roads across the United States. Speeds were acquired on randomly drawn road segments on limited access highways, major and minor arterial roads, and collector roads. Speed measurement sites were selected in road segments with low, medium, or high degrees of horizontal and vertical curvature or gradient. Overall, speeds of free-flow traffic on freeways averaged 70.4 mph and most traffic exceeded the speed limits.
Reference
De Leonardis, D., Huey, R., & Green, J. (2018). National Traffic Speeds Survey III: 2015.
DOT HS 812 485. Washington, DC: National Highway Traffic Safety Administration.
Related Topics
Aggressive driving, speed, speeding, safe driving
