Google Maps wishlist: time estimates for directions based on the weekday & time you plan to leave or arrive. They already have average traffic data on the map. It would be fantastic if they incorporated that into trip planning, so you could say, “Get me from here to there on a Saturday at 5pm” and it’ll calculate that no, this route won’t take 35 minutes, it’ll take an hour because the 110 through Downtown is a parking lot on Saturday afternoons.