I’ve very sympathetic to the developers. It’s a stupidly hard problem to know what speed is likely, at what time of day, on these roads. Far far easier to just have the data of what people are actually doing on these roads. That’s what Google do.
Though if you can detect country road, you could safely assume half the speed advertised.
It’s also cultural. Country roads in my country are 90 km/h and unless it’s dangerous, that’s what you would do on them. Which means speed is lower than posted in tight spots and curves, but not normal roads.
I’ve very sympathetic to the developers. It’s a stupidly hard problem to know what speed is likely, at what time of day, on these roads. Far far easier to just have the data of what people are actually doing on these roads. That’s what Google do.
Though if you can detect country road, you could safely assume half the speed advertised.
It’s also cultural. Country roads in my country are 90 km/h and unless it’s dangerous, that’s what you would do on them. Which means speed is lower than posted in tight spots and curves, but not normal roads.