CDOT released an updated Complete Streets website:
https://www.chicago.gov/city/en/site...cago/home.html
The new pedestrian infrastructure toolkit now includes raised crosswalks:
https://www.chicago.gov/city/en/site...eld-guide.html
I'm contacting my alderman about a few notably bad intersections in my ward, and encourage anyone who's been similarly frustrated by spots in their neighborhoods to do the same (thanks to Ardecila for the suggestion).
From what I can tell, some alders take rolling requests via email, some have forms to submit suggestions ahead of menu fund allocations, and some have participatory budgeting processes (ie. voting for upgrade priorities). If you contact the ward's email address you should figure out the best route for your ward.