ELI5 Airport Runways - how are they numbered?

What do all the signs on an airport taxiway mean? What do the various markings and lights indicate? How are parallel runways numbered? Why does Atlanta Airport use an alternative NATO Phonetic Alphabet?  ... we explain like I'm five To the ELI5 community that has supported us so far, thanks for all your feedback and comments. Send us an e-mail: [email protected]