Have you seen any Christmas & Holiday decorations as part of beautification along any public roads (bridges/highways/roundabouts, etc.)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.featurepics.com%2FFI%2FThumb%2F20121108%2FChristmas-Nativity-Scene-2467936.jpg&hash=05d59c0f09c21a3b15ab22dc100c8ea502679740)
Not if its public as many made a stink about it over time. Private yes! Heck, they made a big splash about St. Cloud, Florida having a cross atop its water tower where a passer by complained to the State about it, which got a court order to remove it later on because of this one person.
This one's pretty popular in Arizona:
http://www.12news.com/story/news/local/valley/2015/11/25/mystery-tree-decorated--17/76398866/ (http://www.12news.com/story/news/local/valley/2015/11/25/mystery-tree-decorated--17/76398866/)
Oxford Street - more to do with shoppers than the road (especially as cars are banned most of the time, and it's just buses and taxis), of couse
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Fwww.travelstay.com%2Fimages%2F1778482%2F1%2Foxford_street_christmas_lights_switch_on.jpg&hash=e4e38a581cdb20d324bdc0638c477e7b145dfd2a)
(https://s-media-cache-ak0.pinimg.com/736x/48/f9/26/48f9264f7452ba48362cec097586e70b.jpg)
and Regent's Street - ditto(though you can drive it)
(https://www.aaroads.com/forum/proxy.php?request=http%3A%2F%2Foptimono.com%2Fwp-content%2Fuploads%2F2015%2F12%2Fchristmas-lights-2015-9ztffkvp.jpg&hash=edfafba9139f441b0295867b0aa8151602e24b0f)
Michigan Ave in Chicago has a lights festival with Disney Characters each year, sort of marks the "beginning" of the season.
(https://fairfieldsuiteschicago.files.wordpress.com/2013/04/michigan-avenue.jpg)
Although not done with any roads, the Chicago skyline seen along Lake Shore Drive (US-41) always looks awesome in its holiday lights
The freeways in Los Angeles have lots of holiday decorations, otherwise known as people dropping Christmas trees into the lanes. :-D I call it "a holiday sale at Macy's."
On 12/25/1978, Charles Kuralt aired an "On the Road" segment on the CBS Evening News about a lone juniper tree on the shoulder of US-50 in Colorado, somewhere between Grand Junction and Delta, that every year during the days before Christmas gradually collected ornaments placed by passersby until by Christmas Day it was a fully-decorated Christmas tree. I wonder if the tree is still there and, if so, if the tradition has continued.
"Just looking at it makes you think about how unexpected life on earth can be. The tree is so lonely and so brave that it seems to offer courage to those who pass it -- and a message. It is the Christmas message: That there is life and hope even in a rough world."