Highway 18
Ruta 18
Expreso Las Américas
Route information
Maintained by Puerto Rico DTPW
Length	6.09 km[1] (3.78 mi)
Existed	1961–present
Major junctions
South end	PR-1 / PR-52 in Monacillo Urbano
Major intersections	PR-21 in Monacillo Urbano PR-17 in Gobernador Piñero PR-23 in Hato Rey Norte
North end	PR-22 in Hato Rey Norte
Location
Country	United States
Territory	Puerto Rico
Municipalities	San Juan
Highway system
Roads in Puerto Rico List
← PR-17 → PR-19

Puerto Rico Highway 18 (PR-18) is a freeway in Puerto Rico, which is also known as Expreso Las Américas. It runs from its north end at its intersection with PR-22 (known as Expreso José de Diego) in San Juan to its south end in Río Piedras where it intersects with PR-1.^[2] At this point PR-18 becomes PR-52, known as Autopista Luis A. Ferré.^[3]

Route description

PR-18 connects PR-52 to PR-22 and intersects with Jesús de Piñero Avenue (PR-17), Franklin Delano Roosevelt Avenue (PR-23), which grants access to Plaza Las Américas, and Domenech Avenue. It is mostly a 4-lane road in each direction. The combined route of PR-18 and PR-52 is coterminous with the unsigned Interstate Highway PRI-1.^{[citation needed]}

• 
  Southbound beginning of PR-18 at PR-22 interchange in Hato Rey Norte barrio
• 
  PR-18 north in Hato Rey Norte barrio
• 
  PR-18 south in Gobernador Piñero barrio

Exit list

The entire route is located in San Juan. 

• 
  PR-18 south at exit 1C to PR-23 east in Hato Rey Norte barrio
• 
  PR-18 north at exit 3A to PR-17 west in Gobernador Piñero barrio
• 
  PR-21 west at its interchange with PR-18 north in Monacillo Urbano barrio

Location	km[4]	mi	Exit	Destinations	Notes
Monacillo Urbano	6.09	3.78	8B	PR-52 south (PRI-1 / Autopista Luis A. Ferré) – Caguas, Cupey, Ponce	Southern terminus of PR-18; PRI-1 continues southbound via PR-52.
	5.9	3.7	8A	PR-1 south – Caguas, Caimito	No southbound access to PR-1 north.
	4.7	2.9	7B	PR-21 east (Avenida Ingeniero José "Kiko" Custodio) – Río Piedras, Cupey	No northbound exit.
	4.5	2.8	7A	PR-21 west (Avenida Ingeniero José "Kiko" Custodio) – Monacillo, Guaynabo, Hospital de Veteranos	Access to Centro Médico station
El Cinco	4.2	2.6	6B	PR-Río Piedras Medical Center	Most direct access to the hospital; southbound only.
	3.5	2.2	6A	PR-Avenida Américo Miranda – Río Piedras Medical Center
Gobernador Piñero	2.7	1.7	5B	PR-17 east (Avenida Jesús T. Piñero) – Carolina, Luis Muñoz Marín International Airport, Trujillo Alto, Río Piedras	Access to The Mall of San Juan and Piñero station
	2.4	1.5	5A	PR-17 west (Avenida Jesús T. Piñero) – Puerto Nuevo
Hato Rey Norte	2.0	1.2	4	PR-Avenida Manuel Domenech – Hato Rey	Access to Hospital del Maestro and Domenech station
	1.5– 0.5	0.93– 0.31	3A–C	PR-23 (Avenida Franklin Delano Roosevelt) / PR-Calle Carlos F. Chardón / PR-Calle Juan Calaf – Puerto Nuevo, Hato Rey	Frontage roads of these exits has an at-grade intersection in Chardon Street; Access to Plaza Las Américas shopping mall and Roosevelt station
	0.0	0.0	0	PR-22 (PRI-2 / Autopista José de Diego) – Guaynabo, Bayamón, Arecibo, Santurce, San Juan, Carolina	Northern terminus of PR-18 and PRI-1; PR-22 exit 2A; access to Fernando Luis Ribas Dominicci Airport
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Incomplete access       Route transition