The conversation between human and AI assistant.
Why do some US interstate highway numbered exits have letters after them (Ex: Exit 54B)?
I was wondering if you could explain to me why some US interstate highway numbered exits have letters after them, such as Exit 54B?
Sure, that's actually a pretty common question! The letters after the exit number indicate that the exit will take you to a specific place or direction. It's usually used when there are multiple exits in close proximity to each other, so the letter differentiates between them.