Sounds like you need to campaign for another bike rack being installed ..

explain to them about the bad design wheel bending low wheel slot racks.
even setting a bunch of steel sign posts in the concrete is better

saw a site where there were pictures of a bunch of signs that were intentionally nonsense, but artistically, professionally done..

so you won't need more real regulations to warrant another sign.

i've also seen a design of a planter box with steel rails, built in
to lock a bike up fitted on either side.

OK maybe under a shaded overhang won't grow sun hungry plants..