Though puddles can occasionally have their upsides, generally speaking they’re one of the ancient enemies of the bike lane.

So we were glad to see one of the country’s sharpest-eyed street designers, Seattle city engineer Dongho Chang, share this useful image on his Twitter feed Monday:

Drainage across an elevated pbl pic.twitter.com/95hIH1KLmu

Dongho Chang (@dongho_chang) May 1, 2015

That shot seems to be from Vancouver, B.C., often a spot for pretty good ideas — though of course subject to somewhat different design laws than U.S. cities. In any case, we’re always glad to share a little trick that seems to be working.