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


 * 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