Puerto Rico Highway System  

Highway shields for primary, urban primary, secondary and tertiary sections of PR1  
Highway names  
Interstates  Intrastate PRnn (PRInn) (unsigned) 
Commonwealth:  Puerto Rico Highway nn (PRnn) 
System links  
The highway system in Puerto Rico is composed of approximately 14,400 kilometers (8,900 mi)^{[1]} of roads in Puerto Rico, maintained by the Puerto Rico Department of Transportation and Public Works (Spanish: Departmento de Transportación y Obras Públicas) or DTOP. The highway system in Puerto Rico is divided into four networks: primary, urban primary, secondary or intermunicipal, and tertiary or local (Spanish: red primaria, red primaria urbana, red secundaria o intermunicipal, and red terciaria o local).^{[1]} Highways may change between networks and retain their same numbers.
Contents
Highway markers
Puerto Rico roads are classified according to the network they belong to. There are four types: primary, urban primary, secondary, and tertiary.^{[1]}^{[2]}
In this regard, a primary road is one which is part of the primary network, an urban primary road is part of the urban primary network, etc. Generally, the same highway may change between networks, but the highway will continue to have the same number. For example, PR1, connecting Ponce and San Juan, is signed as urban primary inside the Ponce city limits, then it is signed as secondary in Ponce's rural barrio Capitanejo, and then it is again signed as urban primary on its entry into the town of Santa Isabel.
Primary roads are numbered 1 through 99, secondary roads are numbered 100 to 299, and tertiary roads are numbered 300 to 9999.^{[3]} In 2009, primary routes comprise about 14% of the total Commonwealth system mileage, secondary about 30%, and tertiary (municipal) about 56% of the total mileage.^{[3]}
Highway type/network  Highway marker for PR1 
Purpose^{[1]}  Route numbers^{[3]} 

Primary roads  Facilitate movement of passengers and freight between major regions in the Island (north, south, east, west)  1–99^{[a]}  
Urban primary roads  Complement the primary network inside a metro area (San Juan, Ponce, Mayagüez, Arecibo, Aguadilla, Humacao, Caguas and Guayama)  Any (1–9999)  
Secondary (or intermunicipal) roads  Provide access to municipalities from primary network roads  100–299^{[a]}  
Tertiary (or intramunicipal) roads  Provide access to a municipality's main urban area from peripheral communities  300–9999 
 ^ ^{a} ^{b} Just like some highways numbered 1–99 may have secondary or tertiary network type markers on specific segments of their roadways, some highways numbered 100–299 may have tertiary network markers—black numbers on white circles set against a black square—in specific segments of those highways as well to indicate that such portions of the highway are part of the tertiary network.
Less common markers
At least two^{[1]} other markers can be observed in Puerto Rico roads today (2019). The first is the older style road marker which, above the route number, also had the outline of the main island of Puerto Rico with the words Puerto Rico on the outline as shown here. Until 1999,^{[citation needed]} all nontolled numbered highways in Puerto Rico had the same route marker, a square with a whiteonblack halfcircle with the route number in the bottom two thirds and a map of Puerto Rico with the words Puerto Rico written inside in the top third. A second road marker, used on the road through El Yunque National Forest, is the browncolored upsidedown trapezoidal marker with the road number on the top twothirds of the sign and the words Bosque Nacional (national forest) on the bottom onethird, as shown.
Roadway maintenance
All Puerto Rico Highway System roads, regardless of the classification used, are maintained by the centralized, Commonwealthlevel, Departmento de Transportación y Obras Públicas (DTOP). Municipal governments are not responsible for maintenance of the Puerto Rico Highway System roads within their territory; whether or not the municipal government is an autonomous government, DTOP is the responsible agency.^{[4]} The DTOP maintains a network of regional offices throughout the island which carry out DTOP work within their multimunicipality region. Municipal governments are only responsible for maintenance of city and town streets within their jurisdictions.^{[5]} On occasion, the central government has entered into memoranda of agreement with municipal governments for the collaborative maintenance of some Puerto Rico Highway System roadways within their municipalities.^{[6]}^{[7]}
Municipal roads
In Puerto Rico, the term municipal road may be encountered occasionally. This is not a “fourth” network of State roads. Roadways that have both their terminus within the same municipality are called tertiary roads and are, by convention, numbered PR300 through PR9999. Tertiary roads are also sometimes called Carreteras de la red local (English: Local network roads).^{[2]}
However, the term municipal road or municipal highway (Spanish: Carretera municipal) refers to any public roadway that is not marked with a Puerto Rico road marker.^{[8]} Roadways marked with a Puerto Rico road marker are those public roadways that include PR followed by a number in its markers. Such roads are considered State roads and part of the Puerto Rico Highway System. Public roadways that do not include such markings are termed municipal roadways. Unlike State roads, which are signed with numbers, municipal roads are signed with names, such as Calle Hostos, Calle De Diego, Calle San Jorge, Calle León M. Acuña.^{[8]}
Tertiary roads are not municipal roads even though at times the term municipal road has been used (as a shortcut to intramunicipal road)—even by the Government of Puerto Rico—to refer to a tertiary State road.^{[3]} The confusion comes from the context in which the phrase municipal road occurs. When the term municipal road occurs in the context of roads owned and maintained by the State government, municipal roads means tertiary State network roads. In this context, a municipal road and a State tertiary road both refer to the same network of State roads. However, if the term occurs in the context of roadways owned and maintained by a municipal government, it refers to the network of local streets and roadways that make up the urban landscape of a municipality.
Another context sometimes encountered is the context of how a road is used, that is, the purpose of a road. The purpose of a road is indicative of whether a road is a municipal road or not. In its strictest meaning, the term municipal roads refers to roads within a municipality's urban center that provide access from one urban neighborhood to another urban neighborhood within the same urban area (city, town, poblado, etc.), while in the larger context of the State highway system, municipal roads refers to roads that “provide access to the main urban area of a municipality from peripheral communities” (that is, tertiary roads).^{[1]} Municipal roads are maintained by the municipal government where those roads occur, while tertiary roads are maintained by the State government. As stated under the section Road maintenance, at times the State government has entered into Memorandums of Agreement with municipal governments for the upkeep of a State tertiary roadway (note this is a Stateowned road that runs entirely within a single municipality), but this does not make it a municipal road—the road continues to maintain its State signage and ownership.^{[6]}^{[7]}
Expressways
Highways with control access fall into three types: An expressway is an arterial highway with full or partial control of access. Expressways with full control of access are termed freeways. If the freeway charges a toll for its use, it is called an autopista.^{[3]} Most tollbooths accept the AutoExpreso, an electronic toll collection system, to avoid traffic congestion.^{[9]}^{[10]} Toll roads between San Juan and Arecibo, and between San Juan and Ponce were envisioned by J. Raymond Watson, a Puerto Rican engineer, in 1970.^{[11]}
All Puerto Rico expressways are signed either as primary or as primary urban routes.
Route  Name  Terminus  Maximum speed limit  Comments 

PR2  Expreso Kennedy  Starts from San Patricio Plaza (Guaynabo) to Santurce (San Juan, aka Parada 18).  50 mph (80 km/h)  Guaynabo to San Juan section only. 
PR2  Roberto Sánchez Vilella  Starts from Mayagüez Mall (Mayagüez) to PR1 in Ponce  55 mph (90 km/h)  Mostly converted to expressway from Mayagüez Mall to Ponce. 
PR5  Expreso Río Hondo  Bayamón, PR22 to Naranjito, PR147 and PR149 with discontinuity between PR199 in Bayamón and PR167 in Toa Alta.  50 mph (80 km/h)  Tolled. This road has three expressway segments as of April 2012—these are between PR29 and PR22 and between PR2 and PR199 (both in Bayamón), an unbuilt portion in southern Bayamón and a portion between PR167 (Toa Alta) and the town of Naranjito. 
PR9  Baldorioty de Castro  PR10 Barrio Portugués to PR2 Barrio El Tuque  55 miles per hour (89 km/h) to 65 miles per hour (105 km/h)  From PR123 to PR2 still under construction 
PR12  Santiago de los Caballeros  PR14 Barrio Machuelo Abajo to PR123 Barrio Playa  55 miles per hour (89 km/h)  
PR18  Expreso Las Américas  PR22 San Juan and PR52 San Juan  55 to 65 mph (90 to 110 km/h)  
PR20  Expreso Rafael Martínez Nadal  PR2 in the San Patricio area in Guaynabo to PR1 in La Muda sector in Caguas  55 mph (90 km/h)  Tolled 
PR22  Autopista José de Diego  Hatillo, PR2 to San Juan, PR26  65 mph (105 km/h)  Extension to Aguadilla in planning. Tolled 
PR26  Expreso Román Baldorioty de Castro  San Antonio Bridge (Bridge to Old San Juan Island) to PR3 in Carolina.  65 mph (105 km/h)  
PR30  Expreso Cruz Ortiz Stella  Caguas, PR1 to Humacao, PR53  55 mph (90 km/h)  
PR52  Autopista Luis A. Ferré  Ponce, PR2 to San Juan, PR1 and PR18  65 mph (105 km/h)  Tolled. This highway is the longest tolled freeway in Puerto Rico. 
PR53  Autopista Dr. José Celso Barbosa  Fajardo to Yabucoa, and then Guayama to Salinas.  65 mph (105 km/h)  Maunabo tunnels constructed in October 2008. The segments between Yabucoa and Maunabo still incomplete. 
PR60  Avenida Dionisio Casillas  Humacao, PR30 to Humacao, PR3  55 mph (90 km/h)  
PR66  Autopista Roberto Sánchez Vilella  PR3 in Carolina and Río Grande  65 mph (105 km/h)  Second half opened in October 2012 to Río Grande. Tolled. 
PR165  Expreso El Caño  Guaynabo, PR2 and PR23 to Cataño  50 mph (80 km/h) 
List of highways
Below is a list of some highways in Puerto Rico along with the municipalities where they begin and end.
Primary highways
Primary roads are numbered in the 1 to 99 range and are distributed randomly throughout the island.
Number  Length (mi)  Length (km)  Southern or western terminus  Northern or eastern terminus  Formed  Removed  Notes  

PR1  —  —  PR123 in Ponce  Calle Tanca in San Juan  —  —  Carretera Central  
PR2  —  —  PR1 / PR133 in Ponce  PR26 in San Juan  —  —  
PR2R  —  —  PR440 in Aguadilla  PR2 in Aguadilla  —  —  Aguadilla business spur  
PR2R  —  —  PR2 / PR114 in Mayagüez  PR2 in Mayagüez  —  —  Mayagüez business loop  
PR2R  1.01^{[12]}  1.63  PR2 in Ponce  PR123 in Ponce  —  —  Ponce business spur  
PR3  —  —  PR1 in Salinas  PR1 in San Juan  —  —  
PR3R  —  —  PR3 in Humacao  PR3 in Humacao  —  —  Humacao business loop  
PR4  —  —  PR17 in San Juan  PR26 in Carolina  —  —  Became part of PR8  
PR4  —  —  PR114 in Hormigueros  PR102 in San Germán  —  —  Renumbered to PR103 and PR101  
PR5  —  —  PR164 in Naranjito  Calle Canal in Cataño  —  —  Tolled in Bayamón. PR5 exists into two segments due to an unconstructed portion in Bayamón.  
PR5  —  —  PR2 in Aguadilla  PR2 in Aguadilla  —  —  Renumbered to PR107 and PR110  
PR6  —  —  PR5 in Bayamón  PR2 in Bayamón  —  —  
PR8  —  —  PR17 in San Juan  Near PR3 in Carolina  —  —  Formerly PR4  
PR9  4.52^{[13]}  7.27  PR2 / PR52 in Ponce  PR10 in Ponce  —  —  PR9 currently exists in two portions, as the portion between PR123 and PR500 is actually under construction.  
PR10  42.42^{[14]}  68.27  PR5506 in Ponce  PR2 in Arecibo  —  —  PR10 exists into two segments due to a stillunderconstruction portion between Adjuntas and Utuado.  
PR12  3.28^{[15]}  5.28  La Guancha in Ponce  PR14 in Ponce  —  —  
PR14  —  —  PR123 in Ponce  PR1 in Cayey  —  —  Carretera Central  
PR14R  —  —  PR123 in Ponce  PR14 in Ponce  —  —  
PR15  —  —  PR3 in Guayama  PR14 in Cayey  —  —  
PR16  —  —  PR1 in San Juan  PR1 / PR26 in San Juan  —  —  
PR17  —  —  PR19 in San Juan  PR26 in Carolina  —  —  Tolled in Teodoro Moscoso Bridge.  
PR18  3.78^{[15]}  6.08  PR1 / PR52 in San Juan  PR22 in San Juan  —  —  
PR19  —  —  PR20 in San Juan  PR2 in Guaynabo  —  —  PR19 is the main avenue in San Patricio, Guaynabo.  
PR20  6.03^{[15]}  9.70  PR1 in Guaynabo  PR2 in Guaynabo  —  —  Tolled  
PR21  —  —  PR20 in San Juan  PR1 / PR176 in San Juan  —  —  
PR22  52.01^{[15]}  83.70  PR2 in Hatillo  PR26 in San Juan  1969^{[16]}  current  Tolled  
PR23  —  —  PR2 / PR165 in Guaynabo  PR27 in San Juan  —  —  
PR24  —  —  PR165 in Guaynabo  PR888 in Cataño  —  —  
PR25  —  —  PR3 in San Juan  Calle Recinto Sur in San Juan  —  —  
PR25R  —  —  PR1 in San Juan  PR25 in San Juan  —  —  
PR26  9.63^{[15]}  15.50  PR1 in San Juan  PR3 / PR66 in Carolina  —  —  
PR27  —  —  PR3 in San Juan  PR36 in San Juan  —  —  
PR28  —  —  PR5 in Bayamón  PR2 in Guaynabo  —  —  
PR29  —  —  PR2 in Bayamón  PR5 in Bayamón  —  —  
PR30  19.08^{[15]}  30.71  PR1 in Caguas  PR53 in Humacao  —  —  
PR31  —  —  PR30 / PR9913 in Juncos  PR3 in Naguabo  —  —  
PR32  —  —  PR172 in Caguas  PR1 in Caguas  —  —  
PR33  —  —  Bulevar Cristóbal Colón in Caguas  PR1 / PR189 in Caguas  —  —  
PR34  —  —  PR32 in Caguas  PR196 in Caguas  —  —  
PR35  —  —  PR1 in San Juan  PR16 in San Juan  —  —  
PR36  —  —  PR35 in San Juan  PR27 in San Juan  —  —  
PR37  —  —  PR25 in San Juan  PR187 in Carolina  —  —  
PR38  —  —  Calle Recinto Sur in San Juan  PR25 in San Juan  —  —  
PR39  —  —  PR1 in San Juan  PR25 in San Juan  —  —  
PR40  —  —  PR25 in San Juan  PR27 in San Juan  —  —  
PR41  —  —  PR17 in San Juan  PR25 in San Juan  —  —  
PR42  —  —  Calle Lafayette in San Juan  PR39 in San Juan  —  —  
PR47  —  —  Calle Ferrocarril in San Juan  PR3 in San Juan  —  —  
PR52  67.30^{[15]}  108.31  PR2 / PR9 in Ponce  PR1 / PR18 in San Juan  1968^{[16]}  current  Tolled  
PR53  —  —  PR52 in Salinas  PR3 / PR194 in Fajardo  1988^{[16]}  current  Tolled. PR53 exists into four portions due to an unconstructed segments between Guayama and Yabucoa.  
PR54  —  —  PR53 / PR7711 in Guayama  PR3 / PR748 in Guayama  —  —  
PR60  2.21^{[15]}  3.56  PR30 in Humacao  PR3 in Humacao  —  —  
PR63  —  —  PR102 in Mayagüez  PR2 in Mayagüez  —  —  
PR64  —  —  PR102 / PR3342 in Mayagüez  PR2 / PR342 in Mayagüez  —  —  
PR65  —  —  PR2R in Mayagüez  PR106 in Mayagüez  —  —  
PR66  —  —  PR3 / PR26 in Carolina  PR3 / PR187 in Río Grande  —  —  Tolled  

Secondary highways
Secondary roads are numbered in the 100 to 299 range. Unlike primary highways, which are numbered randomly throughout the island, secondary highways generally follow a grid pattern. They begin from the southwest portion of the island with PR100 and increase in number as you progress in a northeasterly fashion. PR100 is located in the southwestern town of Cabo Rojo, whilst PR198 is in Juncos, Las Piedras and Humacao in the eastern part of Puerto Rico. The highest secondary highway number assigned so far (February 2014) is 252 (PR252), located in the northeastern municipalityisland of Culebra. A few roads “violate” this grid order; for example, PR199 lies in Guaynabo and San Juan.
Tertiary highways
Tertiary highways also follow a general grid. Towns which do not border the Atlantic Ocean or the Caribbean Sea, especially in the mountainous area, may overlap this grid, for example Ciales may have both highways in the 600699 grid and the 500599 grid, depending where they begin further north or further south. Generally along the areas where the highways are, the lower the number, the more south it is. Culebra is the only town in Puerto Rico that does not fall in any of the regions, for only PR250 and PR251 are the main routes. The entire immediate metropolitan area of San Juan with the exception of Caguas falls in the 800 region, while the entire east coast (north and south) east of San Juan, Caguas and Patillas fall in the 900 region. This is because the eastern portion of Puerto Rico has a southeastern coast which goes to the west from Humacao, which roughly defines where the Vieques Passage and the Caribbean Sea meet along the coast. Yabucoa is in the exact southsoutheast area and lies in the 900 region, while Maunabo overlaps the 700's and 900's regions. Vieques, an offshore islandmunicipality, has some highways in the 900 order.
Some roads are numbered using four digits. For example, PR5506. These are branches, or spurs, of tertiary roads by the same last three digit number. Thus, PR5506 is a branch of PR506. They are often dead end branches, and are common in the mountain regions of the main island. Sometimes they are loops branching off the main road and eventually connecting back to the same main tertiary road. The “fourth” digit is generally a repeat of the first digit of the main tertiary road in question. Thus, a branch of PR301 would be signed PR3301, with the added 3 prefixing the number of the main tertiary road associated with the spur, 301, because 3 is the first digit of the main road. When the road has more than one distinct spur, an additional unrelated digit is used (example, PR4301).
Number  Length (mi)  Length (km)  Southern or western terminus  Northern or eastern terminus  Formed  Removed  Notes  

PR301  —  —  Los Morrillos Light in Cabo Rojo  PR101 in Cabo Rojo  —  —  
PR339  —  —  PR105 in Mayagüez  PR119 in Mayagüez  —  —  Ruta Panorámica  
PR344  —  —  PR345 in Hormigueros  PR348 in Mayagüez  —  —  
PR365  —  —  PR368 in Sabana Grande  PR105 in Maricao  —  —  Part of the Ruta Panorámica  
PR366  —  —  PR120 in Sabana Grande  PR365 in Maricao  —  —  Ruta Panorámica  
PR385  —  —  PR127 in Peñuelas  PR132 in Peñuelas  —  —  
PR413  —  —  PR115 in Rincón  PR115 in Rincón  —  —  
PR500  —  —  Barrio Canas in Ponce  PR132 in Ponce  —  —  
PR501  —  —  PR123 in Ponce  Barrio Marueño in Ponce  —  —  
PR502  —  —  PR132 in Ponce  PR501 in Ponce  —  —  
PR503  —  —  PR14R in Ponce  PR143 in Utuado  —  —  
PR504  —  —  PR503 in Ponce  PR505 in Ponce  —  —  
PR505  —  —  PR139 in Ponce  PR503 in Ponce  —  —  
PR506  —  —  Barrio Coto Laurel in Ponce  PR14 in Ponce  —  —  
PR510  —  —  PR1 in Ponce  PR14 in Juana Díaz  —  —  
PR511  —  —  PR14 in Ponce  Anón in Ponce  —  —  
PR515  —  —  PR123 in Ponce  PR10 in Ponce  —  —  
PR516  —  —  Sector Santas Pascuas in Ponce  PR123 in Ponce  —  —  
PR518  —  —  PR131 in Adjuntas  PR123 in Adjuntas  —  —  Ruta Panorámica  
PR525  —  —  PR135 in Adjuntas  PR131 in Adjuntas  —  —  Ruta Panorámica  
PR549  —  —  Barrio Canas in Ponce  PR132 in Ponce  —  —  
PR568  —  —  PR5155 in Orocovis  PR159 in Corozal  —  —  
PR577  —  —  PR143 in Ponce  Cerro Maravilla in Ponce  —  —  
PR578  —  —  PR1 in Ponce  PR1 in Ponce  —  —  
PR585  —  —  PR123 in Ponce  PR2R in Ponce  —  —  
PR588  —  —  PR504 in Ponce  Camino La Zarza in Ponce  —  —  
PR591  —  —  PR2 in Ponce  PR2 in Ponce  —  —  
PR693  —  —  PR690 in Vega Alta  PR2 / PR165 in Dorado  —  —  
PR715  —  —  Barrio Cercadillo in Cayey  PR1 in Cayey  —  —  Part of the Ruta Panorámica  
PR722  —  —  PR162 / PR7718 in Aibonito  PR14 in Aibonito  —  —  Part of the Ruta Panorámica  
PR723  —  —  PR143 in Coamo  PR14 in Aibonito  —  —  Ruta Panorámica  
PR735  —  —  PR1 in Cayey  PR1 in Cayey  —  —  Carretera Central  
PR741  —  —  PR15 in Cayey  Barrio Culebras Alto in Cayey  —  —  Ruta Panorámica  
PR742  —  —  PR179 in Guayama  PR738 in Cayey  —  —  Part of the Ruta Panorámica  
PR760  —  —  Punta Tuna Light in Maunabo  PR3 in Maunabo  —  —  Part of the Ruta Panorámica  
PR798  —  —  PR1 in Caguas  PR1 in San Juan  —  —  Carretera Central  
PR803  —  —  PR152 / PR802 in Naranjito  PR164 in Corozal  —  —  
PR866  —  —  PR2 in Toa Baja  PR167 in Toa Baja  —  —  
PR873  —  —  PR1 in San Juan  PR1 in San Juan  —  —  Carretera Central  
PR891  —  —  PR159 in Corozal  PR159 in Corozal  —  —  Formerly PR159  
PR901  —  —  PR760 in Maunabo  PR182 in Yabucoa  —  —  Ruta Panorámica  
PR908  —  —  PR3 in Yabucoa  PR3 in Humacao  —  —  
PR939  —  —  PR760 in Maunabo  Barrio Quebrada Arenas in Maunabo  —  —  Part of the Ruta Panorámica  
PR998  5.47^{[22]}  8.80  Port of Culebra  Zoni Beach in Culebra  —  —  Renumbered to PR250  
PR999  1.74^{[21]}  2.80  PR250 in Culebra  Flamenco Beach in Culebra  —  —  Renumbered to PR251  
PR1107  —  —  PR2 / PR111 in Aguadilla  PR107 in Aguadilla  —  —  Formerly PR111  
PR1111  —  —  PR111 in Lares  PR111 in Lares  —  —  Formerly PR111  
PR1116  —  —  PR116 in Guánica  PR121 in Yauco  —  —  Formerly PR116R  
PR1150  —  —  PR150 in Villalba  PR149R / PR150 in Villalba  —  —  
PR1181  —  —  PR3 in Patillas  PR3 in Patillas  —  —  
PR3101  —  —  PR101 in Lajas  PR101 in Lajas  —  —  
PR3108  —  —  PR2 in Mayagüez  PR108 in Mayagüez  —  —  
PR3116  —  —  PR116 in Guánica  PR116 in Guánica  —  —  Formerly PR116  
PR3131  —  —  PR132 in Guayanilla  Sector Malpaso in Peñuelas  —  —  
PR3132  —  —  PR132 in Peñuelas  PR132 in Peñuelas  —  —  
PR3301  —  —  Calle Mariana Bracetti in Cabo Rojo  PR301 in Cabo Rojo  —  —  
PR3342  —  —  PR102 in Mayagüez  PR64 / PR102 in Mayagüez  —  —  
PR4010  —  —  PR110 in Aguadilla  Ramey Air Force Base in Aguadilla  —  —  Formerly PR110R  
PR4110  —  —  PR443 in Aguadilla  PR110 in Moca  —  —  
PR4111  —  —  PR111 in San Sebastián  PR111 in San Sebastián  —  —  Formerly PR111  
PR4116  —  —  PR116 in Guánica  PR116 in Guánica  —  —  Formerly PR116R  
PR4119  —  —  PR485 in Quebradillas  PR119 in Camuy  —  —  Formerly PR485  
PR4128  —  —  PR111 in Lares  PR128 in Lares  —  —  
PR4415  —  —  PR417 in Aguada  PR115 in Aguada  —  —  Formerly PR115R  
PR5139  ���  —  PR14 in Ponce  PR139 / PR139R in Ponce  —  —  
PR5141  —  —  PR144 in Jayuya  PR141 in Jayuya  —  —  
PR5144  —  —  PR141 in Jayuya  PR144 in Jayuya  —  —  
PR5155  —  —  PR155 in Orocovis  PR155 in Orocovis  —  —  Formerly PR155  
PR5156  —  —  PR155 in Orocovis  PR156 in Orocovis  —  —  
PR5506  —  —  PR1 in Ponce  PR10 in Ponce  —  —  
PR5561  —  —  PR149 in Villalba  PR150 in Villalba  —  —  
PR5568  —  —  PR568 in Corozal  PR159 / PR647 in Corozal  —  —  
PR6111  —  —  PR111 in Utuado  PR111 in Utuado  —  —  Formerly PR111R  
PR6140  —  —  PR2 in Barceloneta  PR140 in Barceloneta  —  —  Formerly PR140  
PR6165  —  —  PR693 in Dorado  PR165 in Dorado  —  —  
PR6685  —  —  PR146 in Ciales  PR2 in Manatí  —  —  Formerly PR149  
PR6693  —  —  PR696 in Dorado  PR693 in Dorado  —  —  
PR7014  —  —  PR14 in Cayey  Calle Enramada in Cayey  —  —  
PR7156  —  —  PR156 in Aguas Buenas  PR156 in Caguas  —  —  Formerly PR156  
PR7167  —  —  PR156 / PR167 in Comerío  La Plata River in Comerío  —  —  Formerly PR156  
PR7173  —  —  Barrio Sumidero in Aguas Buenas  PR173 in Aguas Buenas  —  —  
PR7718  —  —  PR14 in Aibonito  PR162 / PR722 in Aibonito  —  —  Ruta Panorámica^{[23]}  
PR7722  —  —  PR722 in Aibonito  PR1 in Cayey  —  —  Ruta Panorámica  
PR7737  —  —  PR715 in Cayey  PR15 in Cayey  —  —  Ruta Panorámica  
PR7740  —  —  PR184 in Patillas  PR181 in San Lorenzo  —  —  Ruta Panorámica  
PR7741  —  —  PR741 in Cayey  PR742 in Guayama  —  —  Ruta Panorámica  
PR8176  —  —  PR176 in San Juan  PR176 in San Juan  —  —  
PR8177  —  —  PR177 in Guaynabo  PR177 in Guaynabo  —  —  
PR8834  —  —  PR1 / PR173 in Guaynabo  PR1 / PR169 in Guaynabo  —  —  Carretera Central  
PR8838  —  —  PR177 in San Juan  PR1 in San Juan  —  —  Carretera Central  
PR9030  —  —  PR189 in Gurabo  PR933 in Gurabo  —  —  
PR9185  —  —  PR185 in Juncos  PR31 in Juncos  —  —  
PR9189  —  —  PR189 in Gurabo  Barrio Rincón in Gurabo  —  —  

Interstates
There are no Interstatesigned highways in Puerto Rico, but there are roadways that have received up to 90% of their funding from the Interstate Highway System.^{[24]} Still, at least as of 2007, none of such highways funded by the Interstate Highway program were planned or built to the standards of the Interstate Highway System.^{[25]} As of March 2001, Puerto Rico had 410 km (250 mi) of such roadways.^{[26]} As of 2001, there were three highways in Puerto Rico funded under the Interstate Highway Program.^{[27]} For obvious reasons, these routes—as with Interstate Highways in Alaska and Interstate Highways in Hawaii—do not connect to the Interstate Highway System in the contiguous United States.
Unlike Interstate routes in Hawaii, Puerto Rico Interstate routes are unsigned. For administrative and funding purposes, the three routes have been designated as PRI1, PRI2 and PRI3^{[27]} and run along various combinations of Puerto Rico routes. They do not follow the evenandoddnumber rule used in mainland United States that indicates direction of travel. Per Section 103(c)(1)(B) (ii), Title 23, United States Code (23 U.S.C.) Puerto Rico is exempt from the design standards of Section 109(b).^{[24]}
Puerto Rico's Interstate routes should not to be confused with Puerto Rico Routes PR1, PR2, and PR3, which are other major highways in Puerto Rico.^{[28]}
Route  Component routes  Length mi^{[29]} 
Length km 
From  To 

PRI1  PR52 PR18 
71.08  114.39  PR2 in Ponce  PR2 in San Juan (PR22/PR18 interchange) 
PRI2  PR2 PR22 
138.13  222.30  PR1 in Ponce  PR3 in San Juan (PR1/PR26 interchange) 
PRI3  PR53 PR3 PR66 PR26 
65.27  105.04  PR3 in Humacao  PR2 in San Juan (PR1/PR26/PR66 interchange) 
See also
References
 ^ ^{a} ^{b} ^{c} ^{d} ^{e} ^{f} Autoridad de Carreteras y Transportación (22 December 2004). "Guias para la Selección e Instalación de Rotulos de Orientacion (Suplemento al MUTCD 2003)" (PDF) (in Spanish). Departamento de Transportación y Obras Públicas. p. 1. Archived from the original (PDF) on 4 November 2009. Retrieved 5 January 2015.
 ^ ^{a} ^{b} Guías para la Selección e Instalación de Rótulos de Orientación (Suplemento al MUTCD 2009). Autoridad de Carreteras. 24 July 2015. pp. 12. Accessed 31 March 2019.
 ^ ^{a} ^{b} ^{c} ^{d} ^{e} Autoridad de Carreteras y Transportación Estándares de Ingeniería. "Chapter i: General Design Criteria". Manual de Diseño (PDF) (in Spanish). Departamento de Transportación y Obras Públicas. Sections 103.01, pp. 12. Archived from the original (PDF) on 22 November 2009. Retrieved 5 January 2015.
 ^ "Municipal Ordinance Number 52, Series 20092010. Primera Hora" (PDF) (in Spanish). Autonomous Municipality of Ponce. 28 April 2010. p. 59.
 ^ "Oficinas Regionales" (in Spanish). Departamento de Transportación y Obras Públicas. Archived from the original on 6 September 2010. Retrieved 22 August 2010.
 ^ ^{a} ^{b} "ACT Propone Diseño de Mejoras Geometricas Para Agilizar el Transito en las Rampas de Acceso de la PR52 Hacia y Desde Juana Diaz" (Press release) (in Spanish). Departamento de Transportación y Obras Públicas. 16 November 2010.
 ^ ^{a} ^{b} "Municipio de Ponce Repavimenta la PR2". El Sur a la Vista. Ponce, Puerto Rico (in Spanish). 16 September 2011. Retrieved 19 September 2011.
 ^ ^{a} ^{b} ¿Sabes cómo identificar si una carretera es estatal o municipal? Carlos M. ContrerasAponte, Secretary of the Puerto Rico Department of Transportation and Public Works (DTOP). Departamento de Transportación y Obras Publicas de Puerto Rico. Published 28 August 2017. (Video series name: DTOP en Ruta; Date of video: Unknown). Accessed 2 May 2019.
 ^ "AutoExpreso" (in Spanish). Department of Transportation and Public Works of Puerto Rico. Archived from the original on 23 December 2012. Retrieved 28 December 2012.
 ^ "Tarifas de Estaciones de Peaje" (in Spanish). Department of Transportation and Public Works of Puerto Rico. Retrieved 28 December 2012.
 ^ "Puerto Rico Seeks Prosperity Through Transportation". The New York Times. 29 March 1970. Retrieved 5 September 2019.
 ^ PR2R, Ponce, Puerto Rico PR.Geoview.Info Accessed 3 May 2019.
 ^ Inauguran conector con la PR10 del sur. Sandra Caquías Cruz. El Nuevo Dia. Guaynabo, Puerto Rico. 14 October 2000. Accessed 15 February 2018
 ^ Listado de Sistemas Viales: Muestra. Departamento de Transportación y Obras Publicas de Puerto Rico. 3 May 2019. Archived at WayBack Machine on 20110206 at 05:23:03AM (6 February 2011). Accessed 3 May 2019.
 ^ ^{a} ^{b} ^{c} ^{d} ^{e} ^{f} ^{g} ^{h} Guía de Carreteras Principales, Expresos y Autopistas. Gobierno de Puerto Rico. Departamento de Transportación y Obras Publicas. Accessed 3 May 2019.
 ^ ^{a} ^{b} ^{c} Historia. Departamento de Transportacion y Obras Publicas de Puerto Rico. Archived on 16 February 2009. Retrieved 28 April 2019.
 ^ "RESOLUCIÓN Para ordenar a la Comisión de Transportación, Infraestructura, y de Recreación y Deportes de la Cámara de Representantes de Puerto Rico, a realizar una investigación sobre las condiciones de la Carretera 142, la cual discurre por los municipios de Dorado, Toa Alta y Corozal, debido a los constantes accidentes automovilísticos en la zona que ponen en peligro la seguridad de los usuarios de dicha vía de rodaje" (PDF). House of Representatives of Puerto Rico (in Spanish). Retrieved 6 May 2019.
 ^ "Comunidades impugnarán Ciudadela de Cayey". Centro de Periodismo Investigativo (in Spanish). Retrieved 4 May 2019.
 ^ ^{a} ^{b} ^{c} "Plan Maestro para el Desarrollo Sustentable de Vieques" (PDF). PUERTO RICO Microjuris (in Spanish). 2004. p. 168169. Retrieved 6 June 2019.
 ^ "Ponencia del alcalde del municipio de Aguas Buenas, honorable Luis Arroyo Chiqués sobre la resolución del Senado 40 para investigación sobre la paralización del proyecto expreso número 156 que conduce de Caguas a Aguas Buenas" (PDF). Oficina de Servicios Legislativos (in Spanish). Retrieved 4 May 2019.
 ^ ^{a} ^{b} ^{c} ^{d} "Plan Maestro para el Desarrollo Sustentable de Culebra" (PDF). PUERTO RICO Microjuris (in Spanish). 2004. p. 142. Retrieved 4 May 2019.
 ^ ^{a} ^{b} ^{c} "Culebra, Memoria Núm. 75" (PDF). Puerto Rico Planning Board (in Spanish). 1955. Retrieved 6 June 2019.
 ^ Ley Núm. 62 del año 2016 (P. de la C. 2753): Para designar la Carretera Estatal PR7718, parte de la “Ruta Panorámica Luis Muñoz Marín”, en el Barrio Pasto de Aibonito, Puerto Rico, como “Paseo Don Julio Francisco “Paco” Santos Vázquez”. Ley Num. 62 de 17 de junio de 2016. Camara de Representantes de Puerto Rico. LexJuris Puerto Rico. Accessed 2 May 2019.
 ^ ^{a} ^{b} National Highway System: Interstate Highway System: FHWA Route Log and Finder List: Interstate Funding. US Department of Transportation. National Highway Administration. Accessed 2 May 2019.
 ^ FHWA Route Log and Finder List: Additional Designations. Tony DeSimone. U.S. Federal Highway Administration. 22 March 2007. 2 May 2019.
 ^ "Section D: Puerto Rico Highways" (PDF). Latin America Trade and Transportation Study. Mississippi Department of Transportation. March 2001.
 ^ ^{a} ^{b} DeSimone, Tony (6 April 2011). "Table 3: Interstate Routes in Each of the 50 States, District of Columbia, and Puerto Rico". Route Log and Finder List. Federal Highway Administration. Retrieved 4 July 2012.
 ^ "National Highway System  Puerto Rico Map" (PDF). U.S. Federal Highway Administration. Retrieved 21 February 2019.
 ^ "Table 1: Main Routes of the Dwight D. Eisenhower National System Of Interstate and Defense Highways as of October 31, 2002". Route Log and Finder List. Federal Highway Administration. 4 June 2012. Retrieved 4 July 2012.