Question: The Zacatal Bridge is in a city that is located on the southwest of what island?
Context: The Reedy Point Bridge carries Delaware Route 9 across the Chesapeake & Delaware Canal in Delaware City, Delaware, USA.  A two-lane cantilever bridge similar in appearance to the Platt Bridge in Southwest Philadelphia (near Philadelphia International Airport), the Reedy Point Bridge was built by the U.S. Army Corps of Engineers and opened in 1968, replacing a lift bridge that crossed the C&D Canal prior to the 1955 widening project.  Unlike the nearby St. Georges Bridge, the Reedy Point Bridge spans over salt marshes at the southern approach (which subjects Delaware Route 9 to periodic tidal flooding), the canal itself, and both Fort Dupont and the Governor Bacon Health Center.  An obsolete double-leaf bascule drawbridge, located just less than ⅛ of a mile north of the northern abutment, allows Delaware Route 9 to cross over the Delaware Ship Channel (itself an abandoned section of the original C&D Canal) and is technically part of the Reedy Point Bridge system.  Both the high-level bridge and the drawbridge are maintained by the U.S. Army Corps of Engineers. The Zacatal Bridge (Spanish: Puente El Zacatal ) is located southwest of Ciudad del Carmen, in the state of Campeche in Mexico.  It connects the Atasta peninsula and the Isla del Carmen. Alameda Island is an island in the San Francisco Bay in California.  It is south and west of, and adjacent to Oakland, and across the bay eastward from San Francisco.  Located on the island is most of the city of Alameda, a city in Alameda County.  Also located on the island is the Naval Air Station Alameda, a defunct naval air station, as well as a small uninhabited part of San Francisco.  The island was originally a peninsula and a part of Oakland, and is now separated from the mainland by the Oakland Estuary.  The island is connected to the mainland by four bridges: the Park Street Bridge, Fruitvale Bridge, High Street Bridge, and Bay Farm Island Bridge.  The Posey and Webster Street tubes also connect Oakland to Alameda Island. The Long Island Bridge, sometimes referred to as the Long Island Viaduct, was a bridge in Boston, Massachusetts that connected Long Island to Moon Island.  Both islands are located in Boston Harbor and are connected to the mainland via a causeway from Moon Island to the Squantum neighborhood of Quincy, Massachusetts.  Constructed at a cost of $2,000,000, the bridge was opened on August 4, 1951.  Before the bridge was opened, Long Island was accessible only by the ferry "James M. Curley".  The bridge was built to provide better access to Long Island Hospital, a public facility serving 1,200 chronically ill patients.  After the hospital's closure, the bridge provided access to other city facilities on the island, including a homeless shelter, programs for patients with substance abuse problems, and a fire station. The Baishazhou Yangtze River Bridge (), sometimes referred as the Third Wuhan Yangtze River Bridge for being the third Yangtze river bridge in Wuhan, is a highway bridge over the Yangtze River in Wuhan, Hubei Province, China.  It is located 6.8 kilometers southwest (upstream) of the First Bridge (which connects central Wuchang with central Hanyang).  The two bridge names come from the order of construction (it was built after the First and Second Bridges), and from the name of the small island (Baisha Zhou (白沙洲), i.e. "White Sand Island") located under the bridge. The Queensboro Bridge, also known as the 59th Street Bridge – because its Manhattan end is located between 59th and 60th Streets – and officially titled the Ed Koch Queensboro Bridge, is a cantilever bridge over the East River in New York City that was completed in 1909.  It connects the neighborhood of Long Island City in the borough of Queens with Manhattan, passing over Roosevelt Island.  It carries New York State Route 25 and is the westernmost of the four East River spans that carry a route number: NY 25 terminates at the west (Manhattan) side of the bridge, which once carried NY 24 and NY 25A as well.  The bridge is flanked on its northern side by the freestanding Roosevelt Island Tramway.  The bridge was, for a long time, simply called the Queensboro Bridge, but in March 2011, the bridge was officially renamed in honor of former New York City mayor Ed Koch. Mandaue, officially the City of Mandaue (Cebuano: "Dakbayan sa Mandaue" ; Filipino: "Lungsod ng Mandaue" ) and often referred to as Mandaue City, is a highly urbanized city in the region of Central Visayas (Region VII), Philippines.  It is one of three highly urbanized cities on Cebu island and forms a part of the Cebu Metropolitan area.  Mandaue City is located on the central-eastern coastal region of Cebu; its southwest coast borders the northeast of Mactan Island, where Lapu-Lapu City is located.  Mandaue is connected to Mactan Island via two bridges: the Mactan-Mandaue Bridge and Marcelo Fernan Bridge, and is bounded south and the west by the provincial capital, Cebu City, and north by Consolacion, to which it is linked by the Cansaga Bay Bridge.  The city has an area of 2518 ha .  According to the ?  , it has a population of .  In the ?  electoral roll, it had registered voters. Ciudad del Carmen is a city in the southwest of the Mexican state of Campeche.  Ciudad del Carmen is located at on the southwest of Carmen Island, which stands in the Laguna de Términos on the coast of the Gulf of Mexico.  s of 2010 , Ciudad del Carmen had a population of 169,466, up from the 2005 census of 154,197.  In July 2006 Ciudad del Carmen celebrated its 150th anniversary as a city. Randøy Bridge is a suspension bridge in Hjelmeland municipality in Rogaland county, Norway.  The bridge crosses the Ølesundet strait and links the island of Randøy to the mainland.  The bridge has a main span of 202 m .  The bridge opened in 1976 as part of County Road Fv650.  The bridge is located 4.5 km southwest of the village of Hjelmelandsvågen and about the same distance northeast of the village of Fister. Estero Island is an island located in Lee County, Florida, on the Gulf coast of Southwest Florida.  It is bordered by San Carlos Island to the north and Big Carlos Pass to the south.  The Matanzas Pass Bridge is on the northern end of the island and connects Estero Island over Matazanas Pass to San Carlos Island.  The Big Carlos Bridge (part of the Bonita Beach Causeway) connects the southern end of the island to Black Island (the northern limit of the city of Bonita Springs).
Answer: Carmen Island