New Cars Can Stay in Lane-but Might Not Stop for Parked Cars

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AAA conclusions after testing vehicles with self-driving features: In the closed-course environment, all test vehicles evaluated in this context impacted a simulated disabled vehicle at least once when evaluated at 30 mph. Among test vehicles, the highest average detection/notification TTC was approximately two seconds. In a real-world situation where a driver is disengaged from the driving task for a significant duration, he/she may be unaware of an upcoming critical situation. In this scenario, it is unlikely a notification provided two seconds prior to an
impending collision will provide enough time for the driver to avoid impact if the system does not
adequately intervene. During naturalistic evaluations, an adverse event was observed on average, once every 8 miles. As highway speeds typically exceed 60 mph, an unexpected lane departure that occurs in combination
with a disengaged driver is potentially hazardous for two main reasons. First, a driver simply may not
have time to avoid a potential collision either with a vehicle alongside or a stationary object on the side
of the roadway. Additionally, a driver may be taken by surprise when regaining situational awareness
and consequently overcorrect, potentially resulting in loss of vehicle control.

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