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A common situation, certainly on British motorways in relatively heavy traffic, is to be tooling along at 70mph, and then have to come to a halt - or drop to 20
by bartread 8y ago
A common situation, certainly on British motorways in relatively heavy traffic, is to be tooling along at 70mph, and then have to come to a halt - or drop to 20mph - fairly abruptly due to waves of slow moving traffic that move backwards along the carriageway. I wonder how well such systems would handle that kind of situation, where obstacles might not be stationary, but the speed difference is large?
- stevesimmons 8y agoIt depends on the detector used. Radar in particular is bad for stationary obstacles because it can't separate reflections from the ground from a stationary obstacle. Moving objects are no problem because their radar reflections gets doppler-shifted and can then be separated the ground clutter.
- bartread 8y agoThanks - makes perfect sense.
- lscotte 8y agoIn my experience - a car with both adaptive cruise and auto emergency braking: it handles the situation quite well, but the human driver (i.e. me) uses hints that the autonomous systems cannot, such as brake lights coming on ahead. The auto systems take a second or two longer to react.
- slfnflctd 8y agoI've driven a rental with those features as well, and in my experience at least the Prius version is almost a little oversensitive to brake lights. In adaptive cruise mode, I've had it kind of slam the car's brakes pretty hard just because another car not even in my lane tapped their brakes to make an exit. Of course, I'm not going to test it against stationary objects at high speeds, but at low speeds it definitely gives escalating warnings before you hit the door or wall of a garage. As someone who dented a garage door once, I value this feature.