Just a personal anecdote. I was living in China, my father was visiting and fell ill (anemia). We needed to go to the hospital and decided to call an ambulance vs. calling a car because it could enter the gated compound. For a 3 km ride the price difference wasn't even a concern. A car would cost ~$3 and an ambulance ended up about $30.

PS: An average net salary in that city was about $1700/month at the time.