United States Department of Transportation
i
Opposing Traffic Safety Assist Draft Test Procedure Performability Validation
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2021-04-01
[PDF-2.07 MB]
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Edition:Final Report
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Abstract:This report summarizes test track validation of NHTSA’s September 2019 Opposing Traffic Safety Assist (OTSA) draft research test procedure. Three of the five test scenarios described in this draft procedure (Scenarios 1, 2, and 4) were used to objectively and effectively assess OTSA performance with the SV operating in automation levels 0 and 1. Since the roads used for the work described in this report were unable to support automated lane changes while the SV was being operated in automation level 2, Scenarios 3 and 5 were not used. Three speed combinations for each scenario were used for this testing. One light vehicle equipped with OTSA, a 2017 Mercedes E300, was evaluated. Despite five OTSA system activations being observed during conduct of the crash-imminent scenarios, the OTSA system did not prevent the test vehicle from being within 1.5 ft (0.46 m) laterally of the principal other vehicle travelling in the opposite and adjacent lane. Two OTSA-based brake applications were observed during the false positive evaluations, however, they only induced a subject vehicle yaw rate great enough to briefly satisfy the false positive classification threshold during one of the applications. The tests described in NHTSA’s OTSA draft test procedure were generally found to be performable, however difficultly in satisfying some of the validity criteria due to problems related to test equipment operation was observed during some trials. Also, consideration of how best to perform tests where the subject vehicle performs automated lane changes when being operated in an automation level that enables sustained lateral control, and whether the evaluation criteria stating that the minimum lateral distance between the subject and principal other vehicles should be 1.5 ft (0.46 m) were identified as topics for further research.
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