Double U is a mobile bike parking that can be used as a temporary bicycle rack any where you are can. The design consists of interlacing wooden boards that create a zigzag shape, allowing for bikes to be parked on both sides. The shape forms many vertical angles, which helps the bike stand.  This bike rack is different from a standard bicycle rack because it is a platform for advertisements and a guide which is a mobile application to know where to park and to remember where is your bike.