Why will traffic lights give right of way to EMS vehicles in Chicago Suburbs but not Chicago?

Question

Grew up in the suburbs and have grown accustomed to the strobe light sensors that sit atop traffic lights. They’re incredibly useful for sensing oncoming emergency vehicles, and usually activate the traffic light to stop traffic and give EMS the right of way.

I’ve noticed when driving in the city of Chicago on roadways near, let’s say, the Argonne Ballroom or lakeshore drive, these were not present.

What’s the deal?

In: 9

Answer 1

Those systems cost thousands of dollars per intersection. And Chicago has a lot of traffic signals.