In their Arts District warehouse, they make traffic signs for every occasion: no parking, road work ahead, lane closed and the humble, yellow-and-black set location signs.

Black zebra stripes are created by melanins, a group of pigments that provide yellow, red, brown or black color to hair and skin. Melanins are synthesized by specialized cells known as melanocytes.

There may not usually be a sign when a Zebra crossing is coming up, but they are easily identifiable thanks to black and white stripes painted across the road. Zebra crossings also feature yellow ...

Dublin City Council has launched signage-only zebra ... marked by flashing amber beacons with alternate black and white stripes across ... a fluorescent yellow border. The RUS 066 sign.