I used to commute from Bellevue WA to Kirkland WA, the mainly way across the freeway was either to go down this road over the freeway that didn't used to have sidewalks https://www.google.com/maps/@47.6393386,-122.2032674,17.25z or go 2 miles out of the way and up a huge hill. The right lane is where people wanted to go to get on the freeway at the time. It was easiest to just get in the left lane and do 40mph down the hill which is what cars did speed wise. People gave me plenty of berth if I was moving at car speeds. If I went slow on the right I got tailgated.

My bike was quite stable at 40mph.

No I wouldn't go that fast on a bike path, this was only due to the power of gravity.