No. Reliable, universal and contemporaneous traffic data is generally not open source. You’d need to find a source and populate it yourself (aka the Main Roads department example I gave).

I can’t do that for every place on Earth. I’m not even sure I can do it for myself. It’s genuinely a hard problem and if anyone has a global fix, I’d be curious to see them add it. Not being snide, actually curious.

Best route choices: possibly, but it depends on what you mean. Geometry is pretty easy. Inferring best route based on traffic conditions…see above.

Could it do some dawarich style logging and calculate the time routes take depending on weekday, time, etc?

DON’T FEED CANDY TO THE ASD KID

(but yes, probably, now that I think about it)

God fucking dammit, now you started me thinking about this. Fuck you very much :)

• “Monday at 8am, this section normally takes 14 minutes.”
• “Sunday afternoon, it normally takes 7.”

Record GPS traces for each road, bucket the results by weekday/time, then feed those historical speeds back into routing. Tada - averaged pseudo traffic flow, barring outliers (like traffic accidents etc). That’s what you’re thinking?