Flynn T, McAllister A, Wilkinson C, Siegmund G (2021). Typical acceleration profiles for left-turn maneuvers based on SHRP2 naturalistic driving data. SAE Technical Paper. 2021-01-0889.
Analysis of naturalistic driving data was performed to create a model of typical acceleration profiles of vehicles making a left turn from a stop at a signalized intersection. Fifteen intersections, 8 in North Carolina and 7 in Washington State, were examined. Left turn maneuvers at these intersections were extracted from the Second Strategic Highway Research Program (SHRP2) database. Each traversal included information regarding the driver and vehicle, tri-axial accelerometer measurements, GPS position, network speed, GPS speed, and on-board video within the area surrounding the intersection. The lighting, weather, presence of an advance left turn signal, and the number of vehicles in front of the vehicle of interest were identified from the video. A subset of traversals for vehicles that were initially stopped, had no vehicles in front, and that traveled through their left turn unimpeded by oncoming traffic was used for the analysis. We determined typical longitudinal and lateral acceleration profiles for left turning vehicles based on this subset of naturalistic data. The effects of numerous factors (e.g., type of vehicle, wet vs. dry roads, night vs. day, and age of the driver) on the acceleration profile were explored. This research provides valuable insight into the typical acceleration profiles of left turning vehicles. These profiles can be directly incorporated into accident reconstruction analyses.
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Typical Acceleration Profiles for Left-Turn Maneuvers Based on SHRP2 Naturalistic Driving Data