Starting Over

Just stumbled across an interesting tidbit of information - did you know that the voice of adult Nala in The Lion King was provided by Moira Kelly, who played Mandy in the first season of The West Wing? 

I love discovering connections like this between shows/movies that I enjoy.

Do ambulance drivers have to memorize street maps of the surrounding area(s) before they are allowed to drive the ambulance?

What happens if an ambulance driver gets lost on the way to an pick up a patient?  Are there backup drivers or ambulances ready in case this happens?

What about ambulance drivers in large cities?  Are they responsible for the entire city, or for only a certain radius from their hospital?

I am curious.  Does anyone know the answers to these questions? 

(An ambulance just drove by on the highway with its lights and siren on, in case anyone is wondering what prompted this post)