This is what makes government agencies and the people who work for them, like this hospital, look like a bunch of idiots. The three block radius of "all" buildings would be mostly private property. There is no city ordinance against smoking, vaping or anything else on public roads or sidewalks. This place loses millions of dollars every year of taxpayer money and change CEO's just about every year. I think that they lost 8 million last year. The main road that runs through the hospital campus is the same road that probably 10,000 people use every day going to and from work. The hospital does have its on Police force but think "Campus Cops".
This is about as stupid as a "Fortune 500" employer that I worked for (2000-2005) that went from having probably 20 designated smoking areas to a policy that if tobacco of any kind was visible in your private car in their parking lot , you would be terminated. I left a pack of analogs laying on my console for a year and nothing was ever said. I was glad when my contract job completed.