I have data on exit signs for highways. e.g. what the sign says, what exit it refers to, which lanes are affected. Can I tag nodes with this info? Or should I tag ways? What tags could/should I use?

I have data on exit signs for highways. e.g. what the sign says, what exit it refers to, which lanes are affected. Can I tag nodes with this info? Or should I tag ways? What tags could/should I use?