I stumbled upon a post that the original New York City Transit Authority Graphics Standards Manual from 1970, which was recently found in a locker beneath old gym clothes. When I first saw this my reaction was “Yeah, okay, who cares, a big book of letters”, but the more I thought about it, the cooler it seemed. This book contains the code to the transportation designs of NYC!
You can see the entire book page by page here. Have a great Friday everyone! -Leah