Answer:
I would have a GPS System set up to sync with all Traffic lights and Emergency Services.
When an ambulance leaves a property headed for the hospital they would hit the home button on the Navigation system in the vehicle.
That would then set the route and send a signal ahead of time warning all traffic lights that a Emergency Vehicle is approaching.
The lights would have an extra colour light ( say purple for example) which would activate when the Ambulance was within a certain distance from those lights giving motorists enough time to move safely out of the way allowing the Ambulance to have a clear path through the intersection.
This would save seconds, minutes all which are vital and could mean so many more lives saved as well as less accidents and confusion on the roads when an emergency vehicle is trying to get through the traffic to a Hospital or accident to save peoples lives
Step-by-step explanation: