I used to walk across a nasty junction where the shared path dropped you in the wrong place to ride it safely, it's since had a toucan crossing installed and the bike paths improved. There are a couple of right turns that I walk too - one because of busy traffic and a convenient crossing, and one because the road surface and visibility make it a bit unpleasant to do on the bike with the trailer. I've pushed the mountain bike home once when the chain came off and jammed, and I couldn't unjam it.