Earlier quoted context omitted.
Speeding in a normal car means you may get pulled over and that will increase the time getting there.
If it is really an emergency you should have already called 911. Maybe the dispatcher says drive as fast as you can cause we cannot get an ambulance to you - but in that case you stay on the phone. The dispatcher talking to you is also on radio with police and the flashing lights are your escort as the dispatcher will tell you. But the above is something that I doubt will actually happen - ambulances are generally cl…
Most of the time when I see emergency vehicles plowing down the street, they are pretty much going at the limit, but they look faster, because all the traffic signals favor them, and all the other motorists have pulled out of the way. But a fire truck has still gotta slow down or stop at a busy intersection or just a turn. Pedestrians are a thing. And scooters, and cyclists wearing headphones...