This is a great thread.
Write to your governor and/or mayor.

A while back our mayor INVITED suggestions for spending city tax dollars.
I wroteto him that an arterial that i take to work needed a bike lane.

Letters to the editor also work..

you might not get the thing you ask for, but you do get visibility.

I also attended a town meeting in Lake forest Park about the burke gilman trail.
THAT was interesting.