Bike paths often end in a manner that invites use of "grey" routes, such as at intersections of 5 streets with busy motor traffic.

One of my routes has a bike path that ends at a grass field with 200 yds to a road on which to continue my ride.

On one route home I take 50 yds against the traffic to save doing a left turn at a nasty high traffic intersection, and also save a bit of travel distance.

On the way in to work I have to do a left turn at traffic lights off a divided road with 3 lanes in each direction. When the lights are red as I approach, I cross to the sidewalk on the opposite side, while the cars are stopped at the lights. I have never encountered pedestrians there.