Glossary
- CR = County Road (or City Road, for those counties that have become City of
County, such as the City of Prince Edward County, Ontario) - DR = District Road (only in Muskoka; similar routes in unincorporated districts are usually provincial Secondary or Tertiary Highways)
- MR = Municipal Road (for Separated Municipalities and Single-Tier Municipalities)
- RR = Regional Road (Not Rural Route)
- CH = County Highway - some counties have the same number designation for two or more County Routes, but some (like Durham RM and the City of Norfolk County also list routes as County Highways (CR HWY/RR HWY/DR HWY), abbreviated as CH. These are designations for downloaded former provincial highways. A prime example is Durham RR 2, and Durham RR HWY 2.
Read more about this topic: List Of County Roads In Ontario