Highest and Lowest Elevations for Traffic Signals in the U.S.

[dbz77]

The highest elevation for a traffic signal is (ironically) the eastbound approach to the Eisenhower Tunnel on I-70, at just under 11,200 feet.

https://goo.gl/maps/ZogTyQ9eBdBSjMy47

The lowest elevation for a traffic signal is found at the intersection of 4th Street and Grapefruit Boulevard in Mecca, California, at a little above -200 feet.

https://goo.gl/maps/QUqdqEYCRSiWtAPH7

[Mark68]

So...do we want to do state-by-state, or just end the thread?

[renegade]

I could vote for ending the thread.  Others may feel differently.  I don't want to offend anyone, it's just an opinion.