You could have ambulances without personal cars. But a huge amount of ambulance rides are due to car accidents. Also, our shipping system is backboned by freig

You could have ambulances without personal cars. But a huge amount of ambulance rides are due to car accidents. Also, our shipping system is backboned by freight rail and ocean shipping, not trucks. In particular, the US has a really robust freight rail system for moving massive amounts of goods across the country.