There's a switched-back ramp and footbridge combo to get on and off the Hudson Greenway (MUP) at 181st St. The signage indicates that cyclists should dismount to walk the bike through this section. Nobody, and I mean nobody ever does this. It's a lawyer sign, if you know what I mean. Anyhow one time a woman with an unleashed dog yelled at me "you're not supposed to ride here" and I yelled back "leash law, we're even!".