5th wheel used to aid in parallel parking in 1933.
/r/WeirdWheels: Unusual vehicles, auto tech and art. Welcome and have fun! - We are dedicated to presenting and discussing the odd, unusual and obscure in vehicles, transport technology and automotive art. We want to see the unique, bizarre, niche, strange designs, early solutions and crazy inventions. We enjoy the art, concepts, prototypes and experiments. Niche stuff like country specific models, obscure manufacturers and strange badge engineered cars are in our purview. Industrial, commercial and special use vehicles are too. - July 20, 2019 - 17:59
/r/nextfuckinglevel: ⬆ Next Fucking Level ⬆ - A subreddit for pictures, gifs and videos that are next fucking level. - July 20, 2019 - 16:54
/r/educationalgifs: For .gifs that provide knowledge! - Gifs are great at getting quick to digest info, and /r/educationalgifs strives to give you educational info in this quick to digest format. From chemical processes, to how plants work, to how machines work, /r/educationalgifs will explain many processes in the quick to see format of gifs. - July 20, 2019 - 16:42
/r/AwesomeCarMods: Awesome Car Mods - A subreddit devoted to car modifications that are awesome. This subreddit is pretty simple, the title says it all. - July 20, 2019 - 16:09
/r/CoolNerd: The best place on the internet for cool and nerdy items - This place is dedicated to showcasing the cool and nerdy items from BG's Cool Nerd and elsewhere on the internet. - July 20, 2019 - 15:48
/r/topofreddit: All the top reddit posts - All the top reddit posts - July 20, 2019 - 15:43
Carlus, Wheels of damnation
/r/Bossfight: Boss fight - Pictures of things that could be boss fights, any kind of picture, gif, or video may be used. Come up with a boss name for the title, and if desired add some stats and or back story in the comments. Make your title as creative as possible, something more than "lord of x", or "B'oss". - July 20, 2019 - 16:42