The car reads the speed limit signs too, they don't just rely on GPS.
replyIn some countries the speed limit can change without a explicit sign (speed limits cancelling out at intersections / changes in pavement, etc.). In my experience, in multiple instances the systems offered a speed limit that is higher than the actual one, which can be dangerous if you're just blindly trusting the clanker
replyThe signs also seem to take priority over GPS, I was on a road with a 50mph speed limit tonight and the car read something it thought was a 20mph speed limit sign. I have the beeps disabled but it still displays the red 20mph sign on the dash to let me know it thinks I'm breaking the law.
replyfrom the last rental I had, they're not good at that.
replyWhy wouldn’t they?
replyDataset is readily available for most places. Pull local on entry to jurisdiction on every drive…
Have you ever actually worked with geodata in depth? It's a wall-to-wall nightmare.
replyNever for production at scale admittedly, only for research and on fixed line connections, mostly public transport related. Some datasets are better than others.
replyInternet connected options here in Australia generally have good speed limit data but there are generally very few variable speed limits that allow you to travel faster than usual.
Transition is never perfect but surely regulation would account for that?
I genuinely don’t know but to me it’s an interesting problem.