• There’s a highway near me with tolled express lanes that google always wants me to use instead of the non-tolled lanes which are often jammed with traffic but the suggestion is near constant even in light or no traffic
• google will have me zig zag through side streets and quiet neighborhoods making left and u-turns across traffic instead of just using a perhaps slightly (< 2 minute or < 1km difference) longer but more direct route with 1 or 2 turns

The path / route finding algorithm is usually ok but will excessively choose a complex route over a simple one especially if it has determined it is the shortest by time or distance in absolute terms without looking at which is easiest, something that I’m sure that is hard to factor.

I think there is something to be said about google spreading more and more traffic out of its intended areas. I think I’ve seen in certain areas more enforcement and notices to restrict through-traffic but I don’t know about its effectiveness

Some things don’t truly have an enforcement mechanism but are intended as public guidance