Tallest poles/stands for gantries/masts other than telephone poles/monopoles having the stuff mounted on them or anything that serves another purpose other than mounting traffic control devices. (Think this: https://www.google.com/maps/@33.4587161,-112.0778156,3a,75y,289.85h,121.04t/data=!3m7!1e1!3m5!1s2XXtrkYmdqrLJZkugtkUHA!2e0!5s20110401T000000!7i16384!8i8192) This is more for dedicated gantries/signal poles/masts.
Sometimes there won't be enough space to put the stands for the stuff on elevated roads or bridges or whatever which results in goofy-looking stuff like this: http://prntscr.com/yfhzei
I have no GSV because a friend found it but there's other examples of this I've seen. What are some of the tallest you know of?
Same gantry: TALL (https://goo.gl/maps/PzUTjZftv6Fj4niy7) / SHORT (https://goo.gl/maps/7Z1n3EWyYP5GKyyi7)
This doesn't look that tall on the GSV but if you drive under it it feels taller than usual.
https://www.google.com/maps/@45.2878565,-93.5518604,3a,75y,338.3h,86.5t/data=!3m6!1e1!3m4!1siYuYJ93q02-bAxtU7vtG0g!2e0!7i16384!8i8192