OK so as the old joke goes...How many city workers does it take to change a light bulb?
If you think they may be in danger of being hit by a car what about the photographer who must be standing out in a lane of traffic.
No, he's sitting in his car taking the photo with his cell phone.
Colorado Springs started replacing their bulb signals with LED signals a number of years back. I have one of the older bulb signals. I thought about making a motor driven rotary switch just so it would cycle. Every car shop should have one.