RR abbreviation
1 railroad
▪ Turn left at the RR crossing. 2 or R.R. US rural route ◊The abbreviation RR is used in mailing addresses to places that are located in the country to show which delivery route the mailbox is located on.
▪ RR 5, Box 653
▪ Turn left at the RR crossing.
▪ RR 5, Box 653
