There was a bicycle event here in west LA, last Sunday (CICLAVIA), with a route extending from Culver City to Venice, with the street closed off to traffic, so people could walk, bike, jog, skate, whatever they wanted, along this pathway. It went from 9 am to about 6 pm.
The night before, Saturday, I walked to the local market and along the road were these posters, sandwiched around poles, on trees, etc. When they were put up, I dont know. Maybe in thew wee hours of Saturday morning/Friday night. Many had been torn down, ripped in half, etc, and by Sunday morning most were gone. So i decided to pick up a few off the ground, as I walked home, just for posterity's sake.
They measure 17x22 inches, are on a heavier, glossy stock & printed on both sides with the 2 messages.