I'd be tempted to install some guerilla/volunteer wayfinding in a facility I visited often and, if it worked, bring it to the attention of someone in charge to make permanent. One laminated paper sign (put there by someone else) lasted at least three years marking a non-obvious turn to take to continue on a local bike trail. Eventually, the trail was altered, not the signage.
I am actively involved as a volunteer in the design of bicycle and transit facilities-to-be and upgrades in my area, and I often push for wayfinding. I recently made the acquaintance of some volunteers who spend time near the train station we're expanding, and I encouraged them to attend the community meetings and share stories and insights about all the lost passengers who end up asking them for directions. They're happy to give directions, but they're there limited hours, and that's not why. Also, lost in our train station can mean a long wait if they miss a train or bus, and it's about to get even more complicated. At least one of the volunteers attended a meeting since then—yay!
For one proposed bike bridge, I also suggested naming the bridge, and the staff I said that to lit up. For bicyclists, it means the GPS says, "Turn right onto the So-and-so Bridge," rather than just, "Turn right." It should mean that the bridge has a sign. Some of the ramps don't look like much. For the designers and builders, it's a chance to give a little more heft to a project and possibly honor someone or something of local significance. Plus, a name and a sign are about the least expensive part.
