There is a body of knowledge that New Yorkers gradually accumulate through years of hardened subway travel. If a train car is mysteriously empty, don't get in. Savor your cheese. Beware sharks. But the most prized wisdom is the understanding of where you need to board a train to make your transfer or exit most efficient. For example, when transferring to the L line from the A/C/E or F trains, some use the mnemonic "Down in Front," meaning you want to be in the front of those downtown trains for the fastest transfer to the L. But what if you're a novice who hasn't yet acquired such deep insight? A group of rogue good Samaritans is here to help the newbs.

The Efficient Passenger Project is on a mission to put up signs throughout the subway system guiding commuters to the best spot to board a train in order to make the quickest exit or transfer. The anonymous participants have been placing "Efficient Passenger Project" stickers on and around the turnstiles in select subway stations, signaling the presence of a plaque on the platform that tells you exactly where to stand to make your commute most efficient.

So far the EPP has only rolled out the signage along the L line, but the website promises "more train lines in planning stages, proportional to demand." The founder of the group tells Transportation Nation, "It's a public, civic service. [The subways can be] a labyrinth of tunnels and transfers and stairways. The project is an attempt to kind of rationalize some of that environment, and just make a more enjoyable, faster commute."

The MTA, however, has vowed to remove the unauthorized signs. "These signs have the potential to cause crowding conditions in certain platform areas and will create uneven loading in that some train cars will be overcrowded while others will be under-utilized," says MTA spokesman Kevin Ortiz. "And yes, regular customers don’t need these signs to know which car they should enter."