Incorporating Impacts of Driver Distraction into Highway Design and Traffic Engineering-Phase 2
The objective of this research is to leverage the Strategic Highway Research Program (SHRP) 2 naturalistic driving study (NDS) data to examine and quantify the impacts of driver distraction on perception-reaction time and deceleration rate, two key performance measures for highway design and traffic engineering. Existing guidance documents introduce a variety of assumptions as they relate to these measures.
Preliminary analyses of the NDS data show standard design assumptions may systemically over or underestimate these values, impacting critical design controls such as stopping sight distance and yellow change interval. Much of the extant literature on which existing guidelines are based relies upon laboratory and closed course studies and the most recent update to existing methods was developed more than twenty years ago. Since then, substantive changes have occurred with respect to the vehicle fleet, driver behavior, and other factors that impact driving behavior. NDS data allow for investigation of driving behaviors under a wide range of driving environments.
This study will examine perception-reaction time and deceleration rate under several contexts, such as freeways, two-lane highways, and signalized intersections. This project will also leverage detailed information on driver distractions, including the frequency and duration of distractions.
- Naturalistic Driving Study Pooled Fund