Reply to post: Re: It's always a firetruck

Tesla Autopilot crash driver may have been eating a bagel at the time, was lucky not to get schmeared on road

Kiwi Silver badge
Boffin

Re: It's always a firetruck

Frame of reference issues?

That's common among motorcyclist accidents.

If two of you are approaching a curve or an intersection (eg roads that intersect at 90deg), one vehicle can appear relatively staitonery in relation to it's background due to the changing angle of approach apparent from the other vehicle. Due to this effect, drivers can mis-judge approach speeds quite easily, as the main indicator of speed we use is changes relative to background (especially in the case of smaller vehicles). That's why a fly buzzing across your field of view appears to be going much faster than an airliner a dozen miles away in a clear sky. (well, that and the changing angle-to-target as well)

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