If you look at the bicycling layer on Google Maps regularly, you’ve likely noticed that it’s often completely wrong. It used to be pretty good. I’m not sure what changed but I suspect some kind of “artificial intelligence” is involved in marking this stuff now, based on how nonsensical it can be. NE Brazee St is marked as a multi use path from MLK to Grant Park. SE Steele St is shown to have a bike lane going as far east as 62nd Ave even though it only goes as far as 33rd Pl. The bike lane on SE Milwaukie Ave south of Holgate ends at Mitchell St but somehow extends north to Mall St in Google’s world. Then there’s whatever is happening downtown with random blocks shown having bike lanes.
Submitting corrections is far too much effort to do for free, especially when all you can do is tell whoever is on the other end of the error report form what’s wrong rather than redrawing it yourself. I submitted one for SE 97th around Happy Valley weeks ago and it is still not fixed.
I’m aware of OpenCycleMap but it’s a visual clutter disaster. The data is great but the presentation is not good.
So if you’re using Google Maps to navigate on a bike, watch out. That bike lane you were told went along the entire length of the street might not exist.