In my neighborhood I was slipping and sliding this morning over ice on a long stretch of sidewalk on Chestnut St that was never shoveled.
A big part of the problem, particularly for wheelchairs, is that you need nearly 100% compliance to solve the problem. If even 80% or 90% of the sidewalks are shoveled, the unshoveled sidewalks still push people out in the street. Once on the street, people often just give up on the sidewalks altogether.
What to do? I don’t know