Lyric discussion by jassss 

he's trying to be patient and wants to get inside her pants but she won't let him.

what bob said according to wiki:

"That's about as complete as you can be. Every single letter in that line. It's all true. On a literal and on an escapist level.... Getting back to the yellow railroad, that could be from looking someplace. Being a performer, you travel the world. You're not just looking out of the same window everyday. You're not just walking down the same old street. So you must make yourself observe whatever. But most of the time it hits you. You don't have to observe. It hits you. Like, "yellow railroad" could have been a blinding day when the sun was so bright on a railroad someplace and it stayed on my mind.... These aren't contrived images. These are images which are just in there and have got to come out."

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