Meet-Ambulance Taxi Service
Make a moving target as a possible destination address, and twice reduce the help arrival times.
Usually, when ambulance is called, only the ambulance arrives. In this new world, taxi services develop a feature "pick up and chase", that allows to pick up a passenger, and chase a moving target.
The hospitals and incident managers could have an option then to dispatch both taxi and the ambulance.
The abundance of taxis around cities would mean that arrival times could be shortened nearly two times.