Puerto Rico operates under United States transportation regulations and infrastructure standards, which shapes every aspect of ground movement across the main island and offshore territories. The island spans 110 miles east to west and 40 miles north to south at its widest points, with a total land area of 3,515 square miles. The primary transportation artery is PR-52, a tolled autopista running 67 miles from San Juan south to Ponce, completed in segments between 1953 and 1975. PR-22 runs 51 miles west from San Juan toward Arecibo and Aguadilla along the northern coast. Both highways carry electronic toll collection through AutoExpreso transponders, with cash payment eliminated systemwide in 2010. Tolls range from 75 cents to 3 dollars depending on segment and distance traveled.
The main island contains 16,397 miles of paved roads maintained by the Puerto Rico Department of Transportation and Public Works, with 898 miles classified as primary routes. Road designations follow a numbered system: PR-1 through PR-999 for territorial routes, with numbers below 100 generally indicating primary corridors. The Tren Urbano light rail system operates 10.7 miles of elevated and underground track connecting sixteen stations from Bayamón through San Juan to Santurce, completed in 2004 at a construction cost of 2.25 billion dollars. Daily ridership averaged 34,600 passengers in fiscal year 2019 before declining during pandemic closures. Trains run every 7 to 15 minutes depending on time of day, with a single fare of 75 cents and operating hours from 5:30 AM to 11:30 PM daily.
Car rental requires a valid driver's license from any U.S. state or an international driving permit paired with a home country license for visitors from nations without reciprocal agreements. Puerto Rico recognizes licenses from all fifty states, Canada, and countries signatory to the 1949 Geneva Convention on Road Traffic. Rental agencies operate from Luis Muñoz Marín International Airport in Carolina and satellite locations in major municipalities. Base rates for economy vehicles range from 35 to 65 dollars per day depending on season and advance booking, with mandatory liability insurance adding 12 to 25 dollars daily unless covered by personal or credit card policies meeting Puerto Rico's minimum requirements of 3,000 dollars property damage and 5,000 dollars bodily injury per person.
Driving occurs on the right side of the road. Speed limits are posted in miles per hour: 65 mph maximum on autopistas, 55 mph on primary routes, 35 mph in urban zones, and 15 mph in residential areas unless otherwise marked. Distance markers and directional signage appear in both Spanish and English on primary routes, with Spanish predominating on secondary roads. Traffic signals follow U.S. federal standards with right turns permitted at red lights after stopping unless explicitly prohibited. Law requires all occupants to wear seatbelts, with children under four years or 40 pounds mandated in approved car seats and children four through seven required to use booster seats. Police enforcement focuses on autopista corridors and tourist-heavy routes around San Juan, Ponce, and Rincón.
Gasoline stations operate under familiar U.S. brand names including Puma Energy, Total, Shell, and independent operators. Fuel sells by the U.S. gallon with prices averaging 20 to 35 cents higher than mainland U.S. rates due to shipping costs and the Jones Act requirement that cargo between U.S. ports travel on U.S.-flagged vessels. As of 2024, regular unleaded gasoline ranges from 3.20 to 3.80 dollars per gallon depending on location, with stations in San Juan metro generally priced lower than rural mountain towns. Most stations accept credit cards at the pump, though some rural locations remain cash-only.
Parking in Old San Juan operates through metered street spaces charging 1.50 dollars per hour with enforcement Monday through Saturday from 9 AM to 6 PM. The district contains four municipal parking facilities: the Felisa Rincón de Gautier garage at 300 spaces, the Doña Fela garage at 645 spaces, the Covadonga garage at 1,100 spaces, and the La Puntilla garage at 400 spaces. Hourly rates range from 2 to 4 dollars with daily maximums between 12 and 20 dollars. Residential streets in San Juan, Ponce, and other cities typically allow free parking unless marked otherwise, though availability diminishes sharply in commercial districts during business hours.
Public bus service operates through two separate systems. The Autoridad Metropolitana de Autobuses manages metropolitan San Juan routes covering Bayamón, Guaynabo, Carolina, Cataño, and core San Juan municipalities with 30 routes and approximately 200 buses. Fares cost 75 cents per ride with free transfers within two hours when using a rechargeable smartcard. Buses operate on published schedules with reduced service on Sundays and holidays. Service frequency ranges from every 15 minutes on major corridors to hourly on peripheral routes. The separate Carros Públicos system uses shared-route vans and cars traveling fixed paths between municipalities, primarily serving passengers moving between smaller towns not connected by metropolitan bus lines. These vehicles depart when full rather than on fixed schedules, with fares determined by distance and typically ranging from 2 to 15 dollars for common routes.
Ferry service connects San Juan to the offshore islands of Vieques and Culebra through the Puerto Rico Maritime Transport Authority. Vessels depart from the Ceiba terminal, which replaced the former Fajardo terminal in 2018. The Vieques route runs twice daily in each direction with additional trips on weekends, covering the 12-mile crossing in approximately one hour. The Culebra route operates similarly over a 17-mile distance. Passenger fares cost 2 dollars each way with advance purchase through the online reservation system mandatory since 2019. Vehicle transport costs 19 dollars for motorcycles and 38 dollars for passenger vehicles under 18 feet, with strictly limited spaces requiring booking weeks in advance during peak travel months. Cargo ferries run separately carrying freight and commercial vehicles on different schedules.
Taxis operate from fixed stands at the airport and cruise ship terminals with metered service required by law within the San Juan Tourism Zone, which encompasses Old San Juan, Condado, Ocean Park, and Isla Verde. Meters begin at 3 dollars with 1.90 dollars per mile thereafter. Outside the tourism zone, most drivers negotiate flat rates before departure. Airport taxis to Condado hotels typically charge 12 to 15 dollars, to Old San Juan 15 to 19 dollars, and to Isla Verde 10 to 13 dollars. Ride-hailing services including Uber and Lyft operate throughout the San Juan metropolitan area and major tourist corridors on the main island, with availability diminishing significantly in interior mountain towns and rural areas. Base fares start at 2.50 dollars with per-mile charges of 90 cents to 1.20 dollars depending on service tier and demand surge pricing.
Luis Muñoz Marín International Airport processes all commercial passenger flights to the main island, with smaller facilities at Rafael Hernández Airport in Aguadilla, Mercedita Airport in Ponce, and Antonio Rivera Rodríguez Airport in Vieques handling regional carriers and limited commercial routes. Air Flamenco, Vieques Air Link, and Cape Air operate daily scheduled flights from San Juan to Vieques and Culebra with flight times of 25 to 30 minutes and fares ranging from 60 to 150 dollars each way depending on booking timing. Seaplanes previously served these routes but ceased scheduled operations in 2018.
The karst region of the northern interior presents specific driving challenges due to its geological formation of limestone sinkholes and mogotes creating steep elevation changes on narrow roads. Route PR-10 through the Cordillera Central crosses Cerro de Punta, the island's highest point at 4,390 feet, with grades exceeding 8 percent and sharp switchbacks requiring lower gears and cautious speeds. The Ruta Panorámica, a 165-mile scenic route along the central mountains connecting Mayagüez to Yabucoa, comprises 40 separate road segments designated PR-105 through PR-182 with varying pavement quality and width. Travel time for the complete route exceeds eight hours due to elevation changes and road conditions.