The sign at a busy intersection allows motorcycles and bicycles to pull ahead of waiting cars at traffic lights. Motorcycles have a faster start than cars, but imagine bicycles in front of dozens of cars as the light changes to green.
Designated on the map with a P, indicating a parking lot, the area is located by the Rear gate to Wat Phra That Choeng, and across the street to the waterfront park. Over a decade ago the area was an outdoor restaurant. I remember it because the restaurant staff brought out a fan for the table with the foreigner, me.
The latest 'Colorful' configuration was put together in mid October in time for the longboat races.