Simulation Study Shows that 18 to 84 Percent of Left Turns Across Path/Opposite Direction Crashes Could Be Prevented Using Automatic Braking Compared to 0 to 32 Percent Reduction from Warnings Alone.
A journal article examines the safety benefits of intersection advanced driver assistance system.
Nationwide, United States
Crash and injury prevention estimates for intersection driver assistance systems in left turn across path/opposite direction crashes in the United States
Summary Information
Intersection Advanced Driver Assistance Systems (I-ADAS), sometimes referred to as left-turn assist, have the potential to prevent or reduce the severity of Left Turn Across Path/Opposite Direction (LTAP/OD) crashes. This study estimated the number of LTAP/OD crashes and injuries that could be prevented in the United States for the hypothetical case where involved vehicles were equipped with an I-ADAS. This study reconstructed 501 past vehicle-to-vehicle LTAP/OD crashes in the USA from the National Motor Vehicle Crash Causation Survey (NMVCCS) to evaluate 30 different I-ADAS system variations for each crash.
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Depending on the system design, sightline assumption, intersection advanced driver assistance system (I-ADAS) variation, and fleet penetration, an I-ADAS system that automatically applies emergency braking could avoid 18 to 84 percent of all left turn across path/opposite direction (LTAP/OD) crashes. Only 0 to 32 percent of all LTAP/OD crashes could have been avoided using an I-ADAS system that only warns the driver. An I-ADAS system that applies emergency braking could prevent 47 to 93 percent of front-row occupants from receiving MAIS 2+F injuries. A system that warns the driver in LTAP/OD crashes was able to prevent 0 to 37 percent of front-row occupants from receiving MAIS 2+F injuries. The effectiveness of I-ADAS in reducing crashes and number of injured persons was higher when both vehicles were equipped with I-ADAS. |
