Who's city has these systems?
For those who are new to these, Opticom, made by 3M, is a controller device made to switch traffic lights to red and give the responding Emergency vehicle the right-of-way thru an intersection by giving it the green light in order to shorten response time and keep the public safe. They use a special Infared strobe in which a sensor on the mast (shown below) picks it up and interupts the Traffic light controller's normal pattern and put it in a Preemption sequence (which was explained a little bit ago).
Currently, LaVale Vol. Fire Co. is experimenting with the technology and Cumberland is debating about it.
Below is a picture of the mast sensor, note some of these have lights on them to signal to the responding vehicle that the controller has gone into it's Preemption sequence.