Puerto Rico Highway 181

Puerto Rico Highway 181 (PR-181), also known as Expreso Trujillo Alto (Trujillo Alto Expressway),^[3] is a road in Puerto Rico connecting the municipality of San Juan on the northeastern coastal plain with Patillas on the southeastern coastal plain. Beginning in the Rio Piedras district of barrio Oriente in San Juan at Jesus de Piñero Avenue (PR-17), it runs through Trujillo Alto, Gurabo and San Lorenzo on the Caguas Valley, and western Yabucoa and eastern Patillas on the Sierra de Cayey, before ending in the Patillas Pueblo downtown area on the southeastern coastal plain of Puerto Rico. PR-181 is a four-lane highway from San Juan through the Trujillo Alto Pueblo downtown area, and completely rural on the way to Patillas with the exception of a small tract in Gurabo where it intersects PR-30. Along with PR-10, PR-149, PR-1 and PR-52, it is one of the longest roads crossing the main island from north to south.

Highway 181
Ruta 181
Route information
Maintained by Puerto Rico DTPW
Length	68.65 km[1] (42.66 mi)
Existed	1953[2]–present
Major junctions
South end	PR-3 in Patillas barrio-pueblo
Major intersections	PR-759 in Marín–Matuyas Alto PR-182 in Guayabota PR-765 in Jagual PR-183 in Hato–Quemados PR-929 in Quebrada PR-30 in Jaguar–Mamey PR-189 in Mamey PR-175 / PR-8860 in St. Just–Cuevas PR-199 / PR-876 in St. Just–Cuevas PR-3 / PR-47 in Sabana Llana Sur–Oriente
North end	PR-17 in Oriente
Location
Country	United States
Territory	Puerto Rico
Municipalities	Patillas, Maunabo, Yabucoa, San Lorenzo, Gurabo, Trujillo Alto, San Juan
Highway system
Roads in Puerto Rico List
← PR-180 → PR-182

Route description

Rural road

• 
  Puente de Trujillo Alto
• 
  Trujillo Alto marker on PR-181
• 
  PR-181 north in Gurabo

In Trujillo Alto, near Gurabo, it turns into a rural road with very narrow lanes per direction and hard curves, making it dangerous and requiring low speed limits. In Gurabo, it becomes divided in about 1 kilometer as it intersects Puerto Rico Highway 30, and then quickly turns rural. In San Lorenzo its makes intersection with Puerto Rico Highway 183. For the rest of its length it is still rural. In Yabucoa, PR-182 begins to connect to the main town, while PR-181 continues and as it enters Patillas, it borders lake Carite, before arriving to downtown Patillas, where it meets PR-3.^[1]

Major intersections

• 
  PR-30 east at exit 7 to PR-181 in Gurabo

Municipality	Location	km[4][5]	mi	Destinations	Notes
Patillas	Patillas barrio-pueblo	0.0	0.0	PR-3 (Calle Luis Muñoz Rivera) – Arroyo, Maunabo	Southern terminus of PR-181
		0.3	0.19	PR-799 – Cacao Alto
	Marín	3.6	2.2	PR-7759 – Marín
Patillas–Maunabo municipal line	Marín–Matuyas Alto line	10.3	6.4	PR-759 – Maunabo
Yabucoa	Guayabota	15.1	9.4	PR-182 (Ruta Panorámica) – Yabucoa	Southern terminus of the Ruta Panorámica concurrency
San Lorenzo	Espino	20.6	12.8	PR-7740 (Ruta Panorámica) – Cayey	Northern terminus of the Ruta Panorámica concurrency; the Ruta Panorámica continues toward Patillas
		21.7	13.5	PR-9920 – Quebrada Arenas
		22.0	13.7	PR-745 – Espino
	Quebrada Honda	23.0	14.3	PR-902 – Quebrada Arenas
		24.1	15.0	PR-913 – Quebrada Honda
		24.9	15.5	PR-9912 – Cayaguas
	Jagual	28.1	17.5	PR-765 – Jagual
	Hato–Quemados line	32.0	19.9	PR-788 – Quemados
		32.7 10.3[a]	20.3 6.4	PR-183 west (Carretera Jesús Santa Aponte) – Caguas, Gurabo	Western terminus of PR-183 concurrency
		10.6[a] 32.8	6.6 20.4	PR-183 east (Carretera Jesús Santa Aponte) – Las Piedras	Eastern terminus of PR-183 concurrency
	San Lorenzo barrio-pueblo	33.8	21.0	PR-980 (Calle Varona Suárez) – Las Piedras	One-way street; eastbound access via Calle José de Diego
	San Lorenzo barrio-pueblo–Hato line	34.7	21.6	PR-9931 – Caguas
	Quebrada	37.9– 38.0	23.5– 23.6	PR-931 – Navarro
		38.5	23.9	PR-929 – Juncos
Gurabo	Jaguar	40.8	25.4	PR-9933 – Juncos
	Jaguar–Mamey line	42.8	26.6	PR-30 (Expreso Cruz Ortiz Stella) – Caguas, San Juan, Juncos, Humacao	PR-30 exits 7 and 8; diamond interchange
	Mamey	43.5	27.0	PR-189 – Gurabo, Juncos
	Celada	45.4	28.2	PR-944 – Hato Nuevo
		45.5	28.3	PR-943 – Gurabo
	Quebrada Infierno–Masa line	50.6	31.4	PR-945 – Masa
		54.1	33.6	PR-851 (Carretera Reverendo Erasmo Ocasio Adorno) – La Gloria
Trujillo Alto	Quebrada Negrito–Dos Bocas line	58.4	36.3	PR-852 – Quebrada Grande
	Dos Bocas–La Gloria line	59.5	37.0	PR-851 (Carretera Reverendo Erasmo Ocasio Adorno) – La Gloria
	Trujillo Alto barrio-pueblo–La Gloria line	61.4	38.2	PR-894 to PR-175 – Caguas
	Río Grande de Loíza	61.7– 61.9	38.3– 38.5	Puente de Trujillo Alto[6]
	Cuevas–St. Just line	61.9	38.5	PR-175 / PR-8860 east to PR-876 (Carretera Federico Degetau) – Caguas, Carolina
		63.4	39.4	PR-850 to PR-876 (Carretera Federico Degetau) – Cuevas	Southbound exit and entrance
		63.5– 63.6	39.5– 39.5	PR-199 west (Carretera Coronel Pedro L. Negrón Ramírez) / PR-876 (Carretera Federico Degetau) – Cupey, Guaynabo
		63.8	39.6	PR-848 (Avenida Juan José "Chejuán" García Ríos) – St. Just
Trujillo Alto–San Juan municipal line	St. Just–Cuevas– Sabana Llana Sur tripoint	65.3	40.6	PR-846 / PR-876 (Carretera Federico Degetau) – Cuevas, St. Just
San Juan	Sabana Llana Sur	65.6	40.8	PR-877 (Avenida Trujillo Alto) – Sabana Llana Sur
	Sabana Llana Sur–Oriente line	67.1– 67.4	41.7– 41.9	PR-3 (Avenida 65 de Infantería) / PR-47 (Calle De Diego) – Río Piedras, Caguas, Carolina	Diamond interchange
	Oriente	68.65	42.66	PR-17 (Expreso Jesús T. Piñero) – San Juan, Hato Rey, Carolina, Isla Verde	Northern terminus of PR-181; PR-17 exits 7B and 8
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus       Incomplete access

1. Kilometer markers represent the distance along PR-183 rather than PR-181.

See also

• Puerto Rico portal
• U.S. Roads portal

• 1953 Puerto Rico highway renumbering