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"The car had already seen a 60mph (100km/h) speed limit sign, so it set that as its target speed. " So...what about those signs where kids spray paint 35 to be
by fma 10y ago
"The car had already seen a 60mph (100km/h) speed limit sign, so it set that as its target speed. "
So...what about those signs where kids spray paint 35 to be 85. Will it zoom to 85?
- glibgil 10y agoThe speed of the zone is also in the maps database
- emptybits 10y agoSure, but putting aside pranks and vandals, the question remains what the AI does when there is a small (or large!) discrepancy between 1) physically-signed and 2) mapped/stored speed limits. I've driven roads where the GPS swore the speed limit was 20 clicks slower than the signed speed limit. It is not necessarily safer to drive significantly slower than the posted speed limit, since most traffic will be doing at least that and relative speed differences are a contributor to surprises/crashes/injuries on the road.
- droffel 10y agoSome combination of the speed of the cars around you, the speed limit gleaned from posted signs, the speed listed for the road in the GPS map, and the average speed of cars when traffic is within a density range[1] would work. The reason for using a density range, is that if the cars are too dense, there is likely traffic, and if they're not dense enough, you'll either have outliers skewing the data, or people driving faster than normal, due to the lack of other cars. [1] When you're using Google Maps, google crowdsources data on how fast traffic is moving, based on all devices using Maps in that viscinity. You can infer traffic density based on sampling the number of people in a given area providing data. I assume that this data would only get more granular as time goes on, as we add crowdsourced data from autonomous vehicles as well. https://googleblog.blogspot.com/2009/08/bright-side-of-sitting-in-traffic.html https://googleblog.blogspot.com/2009/08/bright-side-of-sitti...
- esmi 10y agoIt gets totally confused and does the wrong thing forcing the driver to take over. I've driven a Telsa on 101, in the SF Bay Area, where there was a lot of construction. It gets confused by the constructions signs and the extra lines they paint to reroute traffic around their work.
- fma 10y agoI live in Atlanta. Our major highway, 285 has digital signage. The speed limits varies by time, car density etc. my. Can be as low as 25mph on a 5 lane highway. Sometimes the signs say 00 in no traffic lol (I think during testing..?) I can imagine a "smart highway" where the signs broadcast the current speed limit...and hopefully broadcast the current speed.
- educar 10y agoIf kids spray paint 35 to 85, can a human detect it? If a human can, I am sure a machine can as well (at some point).
- startling 10y agoThe question is whether it does, not whether if it's possible.
- tobltobs 10y agoThe human or the machine?
- Cerium 10y agoThe numbers are not arbitrary. There are rules that govern the chosen numbers. Over time we learn that a 2 lane road in a commercial district with street trees is a 35 zone while a 2 lane road in a residential district is a 25 zone. I agree that at some point cars could learn the rules as well.
- mikeash 10y agoThe car doesn't automatically change the cruise speed set point. There's a shortcut (hold the cruise control stalk back for two seconds) to set it to the current speed limit plus your preconfigured offset, but it requires manual intervention for any change.