This is a public album on Photobucket; feel free to peruse.
Crash analysis paint
About the fatal crash
More about the intersection design
Trail review that helped the process
Volunteer work paid off. I researched the site, created the photo album, contacted local officials. Encouraged them to do something. Early on, the crossing signal was revised to include a "countdown" feature.
County road commission head was the key. He brought all the jurisdictions together for a meeting, in which the county parks director offered to cover the costs of the trail work to the city of Wyoming.
The work was finished last week, and the STOP sign/ghostbike lock-up pedestal has been removed (along with the original crosswalk, curb cuts, and signals).