Related Clues:
- Rd. map line, perhaps
- Certain numbered hwy.
- Short map line?
- Wee way
- No. on a map
- I-80, for one
- Highlighted line on a map: Abbr.
- Road atlas abbr., perhaps
- Part of R.R.: Abbr.
- MapQuest request, for short
- I-5, e.g.
- GPS reading
- Bus driver's assignment: Abbr.
- 66 is a well-known one (Abbr.)
- Itinerary info: Abbr.