| Highway 123 | ||||
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| Route information | ||||
| Maintained by DTOP | ||||
| Existed: | circa 1910 – present | |||
| Major junctions | ||||
| South end: |
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| North end: | Arecibo | |||
| Highway system | ||||
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PR-2 in Canas Urbano
PR-163 in Canas Urbano
PR-14 in Cuarto
PR-1 in Plaza Las Delicias, Segundo
PR-132 in Canas Urbano
PR-500 in Canas Urbano
PR-9 in Magueyes Urbano
PR-501 in Magueyes
PR-515 in Guaraguao
PR-143 in Adjuntas
PR-111 in Utuado
PR-621 in North Utuado