The 65-kilometer ribbon of highway connecting Luis Muñoz Marín International Airport to the Ceiba Ferry Terminal at Roosevelt Roads carries more than passengers. It threads the administrative boundary between metropolitan San Juan and the eastern municipality of Ceiba, crossing the geographic threshold that separates continental Puerto Rico from the offshore archipelago of Vieques and Culebra. Since the closure of the Fajardo ferry dock for repairs in 2018, Ceiba has served as the sole vehicular gateway to the Spanish Virgin Islands, absorbing all passenger and cargo traffic bound for the outer islands. The shuttle from San Juan Airport to Ceiba Ferry Terminal operates as a hybrid service, meeting the logistical demands of international arrivals and the fixed timetable of the Puerto Rico Maritime Transportation Authority. Ferry departures from Roosevelt Roads run between 06:30 and 20:00 daily, with a base passenger fare of 2.25 USD plus environmental surcharge. Ground transfers calibrate their schedules to those windows, offering both shared-van and private-vehicle options. Shared shuttles typically consolidate passengers from multiple flights, introducing wait times but reducing per-person cost. Private transfers depart on demand, critical for travelers with tight ferry connections or late-evening arrivals. The route itself descends from the Isla Verde corridor through Carolina, then threads inland via PR-3 and PR-53, bypassing the coastal resort towns of Luquillo and Fajardo. The Roosevelt Roads site, a former U.S. Navy base decommissioned in 2004, now houses the civilian ferry terminal on Marina Drive. Infrastructure remains utilitarian: a concrete embarkment pier, ticketing kiosk, and unpaved overflow parking. The dock itself serves as the last terrestrial checkpoint before passengers board the M/V Cayo Largo or M/V San Juan, the authority's two primary vessels. Freight and passenger operations share the same pier, and vehicle queues during holiday weekends can extend beyond the marina perimeter. Transportation providers registered with the Puerto Rico Tourism Company operate the majority of airport-to-Ceiba transfers, licensed for both individual and group bookings. Vehicles range from sedans to fifteen-passenger vans, all required to carry commercial insurance and GPS tracking. Real-time ferry-schedule integration remains limited; most operators rely on the published Maritime Authority timetable, with a standard recommendation to arrive 60 minutes before departure. Missed connections result in rebooking at the terminal, where same-day standby capacity is not guaranteed during peak travel months.