[DrStrangeLove]

Originally Posted by swisstrains

If you are referring to the cantilevered flashing lights structure then this might help:
https://safety.fhwa.dot.gov/hsip/xin...8040/chp2f.cfm

I see that they talk about t
"The inclusion of a ladder and access walkway allows for easier maintenance with less impact to highway traffic."

But it doesn't explain why they did this over the what is standard for something that is more ubiquitous like traffic lights.