Most major cities will have multiple hospitals coordinating amongst a grid and EMT/fire stations that are localized as well. Depending on traffic you should be

Most major cities will have multiple hospitals coordinating amongst a grid and EMT/fire stations that are localized as well. Depending on traffic you should be at the hospital in under 15. The hospitals may have specialties (head trauma, pediatrics, etc) that are in different city hospitals. These may not be available at all in smaller hospitals. When I used to visit the countryside 1 hospital would serve an entire county or more. And if you couldn't be driven it was an expensive helicopter ride.