I got the idea of using two skateboard ramps as an arch from Murdoch17 who got it from Allan Hall's Harry Potter bridge. I colored it as masonry is normally seen in the UK
Murdoch17 uses grey ramps, however I have two of these in white, so I decided to play around with them in LDD. I think the bridge looks nice, I might build it sometime (when I find those ramp pieces at home, ghnnnn!).
It is built on a 32x32 baseplate with a brick-built road going under.