Lesson

Include pedestrian collision warnings on in-vehicle heads-up displays to reduce reaction time, maximum deceleration, and, in some cases, stopping distance and braking time.

Study performed with sixteen drivers with actual pedestrians in a parking lot environment evaluated a display showing the word “BRAKE” and a virtual shadow that changes size as the vehicle gets closers to the pedestrian.


03/07/2016
Nationwide; United States


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Lesson Learned

Include pedestrian collision warnings on in-vehicle heads-up displays to reduce reaction time, maximum deceleration, and, in some cases, stopping distance and braking time.
  • Reaction, Braking Time, and Time to Stop: Post-hoc tests found the virtual shadow reduced reaction time while increasing braking time, resulting in the same time to stop as the baseline for near and far targets. The brake sign warning reduced reaction and braking times, resulting in reduced time to stop, target distance did not affect reaction time.
  • Maximum Deceleration: For the near targets, both interface designs reduced maximum deceleration. For the far targets, the traditional warning showed even higher maximum deceleration than the baseline.
  • Stopping Distance and Gap: For far targets, both HUD interfaces reduced stopping distance, which resulted in larger gaps leading up to the pedestrians. There was no improvement for the near target.
The proposed design and findings can be extended to other use-cases such as cross traffic alerts to avoid collision with vehicles backing up in parking lots, given that high performance object detection and localization technology is available.


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Source

Look at Me: Augmented Reality Pedestrian Warning System Using an In-vehicle Volumetric Head Up Display

Author: Kim, Hyungil, et.al.

Published By: ACM International Conference on Intelligent User Interfaces

Source Date: 03/07/2016

URL: http://www.yzhang.org/courses/2017hci/papers2read/cnpaper16.pdf

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Janet Fraser
Noblis
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janet.fraser@noblis.org


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Lesson ID: 2017-00775