Puerto Rico Highway 172

Puerto Rico Highway 172 (PR-172) is a secondary highway that connects Caguas, Puerto Rico at PR-1 to downtown Cidra, Puerto Rico and continues its way to its end at Puerto Rico Road 156 in Comerío, Puerto Rico. It is a two-lane per direction road from Caguas to its border point to Cidra and rural all the way to Comerío.^[3][4]

Highway 172
Ruta 172
Route information
Maintained by Puerto Rico DTPW
Length	28.3 km[1] (17.6 mi)
Existed	1953[2]–present
Major junctions
West end	PR-156 in Naranjo
Major intersections	PR-7774 in Vega Redonda PR-7733 in Río Abajo–Ceiba–Rabanal PR-173 in Cidra barrio-pueblo PR-171 / PR-734 in Cidra barrio-pueblo PR-7733 in Bayamón–Arenas PR-787 in Arenas–Bayamón PR-785 in Cañaboncito PR-784 in Cañaboncito PR-52 in Turabo–Cañaboncito PR-32 in Cañaboncito–Turabo
East end	PR-1 in Caguas barrio-pueblo
Location
Country	United States
Territory	Puerto Rico
Municipalities	Comerío, Cidra, Caguas
Highway system
Roads in Puerto Rico List
← PR-171 → PR-173

Route description

Dangerous highway

Puerto Rico Highway 172 has about 4 kilometers going uphill. One side of the road is extremely close to the blasted mountain (See Blasting), meaning that landslides would fall in the right lane of the direction close to it; the other side is near a precipice, with barriers that are not safe. The two directions are not divided, and cars can easily collide head-on. Several people have died on this highway, including cars which have been hit by heavy-weight trucks coming down the hill, with brakes that malfunction or in the case of not having enough time to stop. A death occurred on August 16, 2014. There is one emergency ramp which was built to provide safety for the lane going down the mountain.

Rural road in Cidra

Similar to other highways in Puerto Rico which become rural after entering another town from the town of origin, PR-172 becomes rural and enters downtown Cidra before continuing to its end at PR-156 in Comerío. It is mainly flat, and there are no precipices found on the rest of the highway.

• 
  PR-172 east in Bayamón barrio
• 
  View of Lago de Cidra from PR-172 bridge

Major intersections

• 
  PR-172 west approaching PR-787 intersection in Bayamón, Cidra
• 
  PR-172 west at PR-52 interchange between Turabo and Cañaboncito barrios in Caguas
• 
  PR-52 south at exit 21 to PR-172 in Cañaboncito, Caguas

Municipality	Location	km[1]	mi	Destinations	Notes
Comerío	Naranjo	0.0	0.0	PR-156 – Comerío, Aguas Buenas	Western terminus of PR-172
	Vega Redonda	3.6– 3.7	2.2– 2.3	PR-791 – Cejas
		5.4	3.4	PR-7774 west – Comerío
Cidra	Río Abajo	9.4	5.8	PR-7775 – Rabanal
	Río Abajo–Ceiba– Rabanal tripoint	11.5	7.1	PR-7733 east (Avenida de la Eterna Primavera) – Aibonito, Cayey
	Cidra barrio-pueblo	12.2	7.6	PR-173 south (Calle José Gautier Benítez) – Aibonito	Western terminus of PR-173 concurrency; one-way street
		12.3	7.6	PR-173 north (Calle Román Baldorioty de Castro) – Aguas Buenas	Eastern terminus of PR-173 concurrency; one-way street; northbound access via Calle José Gautier Benítez or Calle Santiago R. Palmer
		12.4– 12.5	7.7– 7.8	PR-171 (Calle Luis Muñoz Rivera) / PR-734 south (Calle José de Diego) – Cayey	One-way streets; PR-734 access via Calle Miguel Planellas or Calle Vicente Muñoz Barrios
	Bayamón–Arenas line	13.6	8.5	PR-7733 west (Avenida de la Eterna Primavera) – Cayey, Aibonito
		13.9	8.6	PR-787 – Las Cruces
Caguas	Cañaboncito	20.9	13.0	PR-785 – Hormigas
		22.2	13.8	PR-784 – Cañaboncito
	Turabo–Cañaboncito line	26.4	16.4	PR-7784 – Caguas
		27.5	17.1	PR-52 (Autopista Luis A. Ferré) – San Juan, Ponce	PR-52 exit 21; diamond interchange
		27.7	17.2	PR-32 north (Avenida Luis Muñoz Marín) – Caguas
	Caguas barrio-pueblo	28.3	17.6	PR-1 (Avenida José Gautier Benítez) – Caguas, Cayey	Eastern terminus of PR-172
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access

See also

• Puerto Rico portal
• U.S. Roads portal

• 1953 Puerto Rico highway renumbering