title: R-21 regional road (Montenegro)
text: # R-21 regional road (Montenegro)
  
  R-21 regional road (Montenegrin: Regionalni put R-21) is a Montenegrin roadway.
  
  This road serves as a shortest connection between Šavnik and Kolašin.
  
  ## History
  
  In 1975, a tunnel under the Semolj was started. It would have been 1750 m long, and 420 m were excavated before the work was stopped the same year.
  
  In January 2016, the Ministry of Transport and Maritime Affairs published bylaw on categorisation of state roads. With new categorisation, part of R-18 regional road between Tušina and Mioska was renamed as R-21 regional road.
  
  ## Major intersections
  
  | Municipality | Location | km | mi | Destinations | Notes |
  | - | - | - | - | - | - |
  | Kolašin | Mioska | 0.0 | 0.0 | M-2 – Kolašin, Podgorica | |
  | Šavnik | Semolj | 25.3 | 15.7 | Mountain pass Semolj 1580 MASL | Mountain pass Semolj 1580 MASL |
  | Šavnik | Boan [fr] | 38.9 | 24.2 | No major intersection | No major intersection |
  | Šavnik | Tušina | 40.0 | 24.9 | R-20 – Šavnik, Žabljak | |
  | 1.000 mi = 1.609 km; 1.000 km = 0.621 mi ||||||
  