Wikipedia:WikiProject U.S. Roads/Puerto Rico/National Highway System

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  • PR-1: PR-30 to PR-20, PR-18 to PR-26
  • PR-2: PR-52 to PR-22, PR-165 to PR-1 (and via PR-165 to PR-22)
  • PR-3: PR-1 to PR-53
  • PR-10: PR-52 to PR-22
  • PR-17: PR-18 to PR-26
  • PR-18: PR-52 to PR-22
  • PR-20: PR-1 to PR-2
  • PR-22: PR-2 to PR-26
  • PR-26: PR-1 to PR-66
  • PR-30: PR-1 to PR-53 (and via PR-1 to PR-52)
  • PR-52: PR-2 to PR-18
  • PR-53: PR-52 to PR-3
  • PR-66: PR-26 to PR-3
  • PR-181: PR-3 to PR-17

Other routes in the primary network (not counting temporary connections around unconstructed freeways): PR-54