Overseas Highway

The Overseas Highway is a offering travelers an exotic roadway through a tropical savanna environment and access to the largest area of coral reefs on the U.S. mainland. Many exotic animals such as the American alligator, American crocodile, and Key deer inhabit the tropical islands of the Florida Keys.

Route description

thumb|Overseas Highway and Railway bridges, [[Florida Keys]]

The Overseas Highway begins at a T intersection between US 1 and SR A1A, from which it heads east. After crossing to Stock Island and forming the boundary between the eponymous district and incorporated Key West, US 1 proceeds through unincorporated Monroe County on Boca Chica Key, past Naval Air Station Key West, and Rockland Key, where the Overseas Highway drops down to a two-lane road. It then crosses East Rockland Key, Big Coppitt Key (and its congruous district), Saddlebunch Keys, Sugarloaf Key, Park Key, Cudjoe Key (and its congruous district), Summerland Key, Ramrod Key, Middle Torch Key, Little Torch Key, Big Pine Key (and its congruous district), Scout Key, and Spanish Harbor Key. The highway expands to four lanes as it crosses the Bahia Honda Bridge, then reduces to two lanes as it traverses Bahia Honda Key, Ohio Key, Missouri Key, and Little Duck Key. After Little Duck Key, US 1 enters Knights Key, Boot Key, Key Vaca, and the town of Marathon via the Seven Mile Bridge, thus leaving the lower Keys.

US 1 runs through Marathon as a four-lane road. After Key Vaca, the road becomes two-lane once more and runs through Fat Deer Key, where it forms the northern boundary of the city of Key Colony Beach. It then continues wholly in Marathon through Long Point Key, Crawl Key, and Grassy Key. The road then crosses to Little Conch Key and then Conch Key, both part of the Duck Key district. US 1 then crosses to and traverses Long Key, which is mostly unincorporated except for the city of Layton, which the highway passes through. The road then reaches Craig Key, and then the village of Islamorada including Lower Matecumbe Key, Tea Table Key, Upper Matecumbe Key, and Windley Key. US 1 crosses a drawbridge onto Plantation Key, where it expands to four lanes and then leaves Islamorada as it crosses to Key Largo. Immediately the Overseas Highway enters Tavernier, where it temporarily splits into a pair of one-way roads through the community. Soon, the road enters the community of Key Largo, At the northern end of the Key Largo district, about two-thirds of the way along the island, US 1 intersects County Road 905 (CR 905), which offers an alternative route out of the Keys via North Key Largo and the Card Sound Bridge. Signage approaching the intersection directs northbound motorists to take this alternative route if the lights on it are flashing. US 1 swings to the northwest, forms the southern boundary of North Key Largo, and becomes a two-lane divided road after the intersection. After crossing the Jewfish Creek Bridge (where it enters unincorporated Monroe County again) and traveling along Cross Key, US 1 crosses Manatee Creek, along with the Miami-Dade County boundary, and reaches the mainland.

Mile markers

The Florida Department of Transportation ("FDOT") maintains mile marker signs in the Florida Keys portion of Monroe County along the Overseas Highway (U.S. Highway No. 1). Numbering commences at "0" in Key West, and increases towards the east until Islamorada where the direction changes to the northeast following the Overseas Highway to Key Largo at "106." Outside of the city of Key West and the city of Marathon, street addresses along the Overseas Highway in the Keys correspond to the mile markers. For example, the Tropical Research Laboratory of Mote Marine Laboratory has a physical address of 24244 Overseas Highway. The first two digits indicate that the Laboratory is located at Mile Marker 24 (corresponding to an address on Summerland Key). The next two digits indicate that it is about a quarter of a mile east of the Mile Marker 24 sign (MM 24.24), while the last digit, because it is an even number, indicates that it is located on the gulf side of the Overseas Highway (the term "gulf side" is used in the Middle and Lower Keys as the Overseas Highway runs east-west there; the term "bayside" is used in the Upper Keys where the Overseas Highway runs north-south. All of the Keys use the term "oceanside"):

The first two-to-three digits denote the Mile Marker, while the next digit denotes the nearest tenth of a mile (e.g., MM 102.5).
An address ending in an odd number indicates the location is on the Atlantic or oceanside of the Overseas Highway, while an address ending in an even number indicates the location is on the Florida Bay/Gulf of Mexico or bayside of the Overseas Highway.

Exceptions to this rule do exist, however. There are occasional addresses ending in even numbers on the oceanside and vice versa.

History

thumb|right|100px|SR 4A, former designation for the Overseas Highway

While the Overseas Highway today runs along the former Overseas Railroad right of way, portions of the highway came into existence earlier in a different alignment while the railroad was still operating. The concept of an Overseas Highway began with the Miami Motor Club in 1921. The Florida land boom of the 1920s was underway and the club wanted to attract tourists to easily reached fishing areas, which could only be reached by boat or train at the time. The land boom also attracted real estate interests who sought vehicular access to the upper keys where there were thousands of acres of undeveloped land. The completion of the railroad further proved a highway through the keys was feasible.

1920s-1935: Original Overseas Highway

thumb|left|Construction of the original highway next to Matecumbe railroad station

Construction on the original Overseas Highway, designated State Road 4A (an extension of a route running from Miami to Homestead), lasted through most of the mid 1920s. Officially opening for traffic on January 25, 1928, the original highway existed in two segments at its greatest extent. One segment ran from the mainland via Card Sound Road to Key Largo and extended as far as Lower Matecumbe Key, while a segment in the lower keys existed from No Name Key to Key West. An automobile ferry service connected the 41-mile gap between Lower Matecumbe and No Name Keys. In 1933, the state legislature created the Overseas Road and Toll Bridge District to seek federal funding to extend and connect the roadways, though funding was scarce as the country was in the Great Depression. Funding would eventually come through the Federal Emergency Relief Administration, a program established by President Franklin D. Roosevelt's New Deal. Hundreds of disgruntled World War I veterans seeking early payment of wartime pensions were employed for construction on the roadway and bridges as part of a government relief program. Just west of Lower Matecumbe Key at Mile Marker 73 on the current highway, eight concrete bridge piers and a small dredged island are all that remains of the veterans' work. The dredged island is now known as Veteran's Key and the piers remain as a tribute to the veterans with a memorial plaque on Craig Key.

thumb|Many of the railroad bridges, such as the Bahia Honda Rail Bridge, were retrofitted to accommodate automobile traffic for the Overseas Highway. These bridges were replaced by more modern bridges in the early 1980s (the bridge pictured here in 2006 had been severed to prevent pedestrian access).

After the hurricane, the Florida East Coast Railway was financially unable to rebuild the damaged sections of the Overseas Railroad. Seizing a rare opportunity, the state abandoned its original plan for highway expansion and instead purchased the railroad's entire right of way south of Florida City and its remaining infrastructure for a price of $640,000. The Overseas Road and Toll Bridge District then made plans to build the highway on the old rail bed from Lower Matecumbe Key to Big Pine Key. The railroad's bridges, which withstood the hurricane and were in good condition, were retrofitted with new two-lane wide concrete surfaces for automobile use. In the case of the Bahia Honda Rail Bridge, which was a truss bridge, the concrete road surface was built on top of the trusses. The conversion of the railroad bridges to automobile use was accomplished by Cleary Brothers Construction Co. of West Palm Beach. This new stretch of highway would effectively connect the two segments of State Road 4A, with present-day Key Deer Boulevard connecting the new highway on Big Pine Key to the original highway on the lower keys.

The fully connected highway from the mainland to Key West was officially opened for traffic on March 29, 1938 and upon completion, the route became the southernmost segment of U.S. Route 1, which previously terminated in Miami (State Road 4A would remain as a hidden designation until the 1945 Florida State Road renumbering, when the hidden designation became State Road 5). President Franklin D. Roosevelt toured the road in 1939.

Portions of the road were tolled until April 15, 1954; toll booths were located on Big Pine Key and Lower Matecumbe Key. Pigeon Key, roughly the midway point of the Seven Mile Bridge, served as the headquarters for the "Overseas Road and Toll District." The toll for automobiles was $1, plus 25 cents per passenger.

1940s-1970s: Further improvements

thumb|left|The beginning of U.S. 1 in March 1951; U.S. 1 has since been extended to the Monroe County Courthouse in downtown Key West

When completed in 1938, the original highway segments were still in use in the upper and lower keys. As the United States entered into World War II, the U.S. Navy sought improvements to the highway to improve their access from the Naval Air Station on Boca Chica Key to the mainland for national security purposes. The 1920s-era lower keys segment was less than ideal with its winding road and rickety wooden bridges. This resulted in relocating the rest of the highway on to the former railroad right of way in the upper and lower keys, which the state owned and was a more direct route with smoother curves that would allow for higher speeds. Also included in this project was the construction of the highway from Florida City to Key Largo on the old railroad route via Jewfish Creek. The new alignments would shorten the route from Key West to the mainland by 17 miles. The new alignments were officially completed on May 16, 1944, with Florida Governor Spessard Holland presiding over ribbon-cutting ceremonies.

After the completion of the realignments in 1944, the original Card Sound Bridge was closed to traffic and its remains were subsequently destroyed by a fire (the Card Sound route would be restored as a secondary route in 1969 with the opening of the current bridge). Today, some segments of the original highway remain as frontage roads for the current highway. In 1946, the State Road Department began removing some of the original highway's wooden bridges that paralleled the rebuilt highway. In the lower keys where the original road ran further south, many of the wooden bridges were left in service allowing some segments of the road to become side roads. However, the original bridges that connected Stock Island and Boca Chica Key, and Geiger Key to the Saddlebunch Keys were removed. Portions of the original highway are now Boca Chica Road and Geiger Road on Boca Chica and Geiger Keys. County Road 939A runs along the original road on the Saddlebunch Keys and Sugarloaf Key, though some portions of the road are now hiking trails. Remnants of the wooden bridge at Tarpon Creek on Upper Sugarloaf Key still remain, which was destroyed by a fire in later years.

1970s-present: Modernization

thumb|Seven Mile Bridge, the longest bridge on the Overseas Highway. The original span crosses over Pigeon Key.

thumb|left|The portion of U.S. 1 in the Keys functions as a [[Scenic byways in the United States|National Scenic Byway, named the "Florida Keys Scenic Highway".]]

The original highway through Key Largo and Tavernier would once again become part of the Overseas Highway in the early 1970s when it was expanded to a four-lane divided highway. Here, the northbound lanes run along the route of the original highway and the southbound lanes along the route of the railroad, which is especially evident in area where the route splits into two one-way streets. The trail will be a multi-use bicycle and pedestrian facility that will traverse the Florida Keys from Key Largo to Key West. Upon completion, the FKOHT will include an integrated system of educational kiosks, roadside picnic areas, scenic overlooks, fishing piers, water access points, and bicycle and jogging paths. The development of the trail will provide a mechanism for the preservation and use of the historic Flagler Railroad Bridges, 23 of which still exist and are mostly intact. Several alternatives exist for trail alignment, including cutting down the , 1940s-era roadway to its original spandrel width, or using the roadway as is, particularly in multi-use areas. In all cases, original bridgework will be repaired or rebuilt, and the breaks created during the 1980s and 1990s fishing pier conversion will be reconnected. Where the original roadway no longer exists, the trail will be temporarily cantilevered on the side of the current US 1 highway bridge, until new trail bridge sections can be built. The new sections will be built to match the historical character of the original bridges.

In popular culture

One of animated television's Wacky Races was The Overseas Hi-Way Race, which first aired on December 28, 1968, on CBS, covering the entire actual route from Key Largo to Key West. While Long Key was correctly portrayed, most of the other in-between keys were given fictional names, and Sombrero Key was actually five miles south of the highway in open water, according to the Florida Keys–East map.

The Overseas Highway is depicted in a screenprint by American artist Ralston Crawford.

Superboy features the bridge in the season 1 opening credits. Actor John Haymes Newton is shown flying around the bridge.

An action scene involving a car and fighter jet was filmed on a portion of the old Seven Mile Bridge for the 1994 James Cameron film True Lies. No part of the bridge was destroyed during filming; an 80-foot model of the bridge built off Sugarloaf Key was blown up instead.

Major intersections

Mileposts are taken from US 1, which begins approximately south at an intersection with Whitehead and Fleming streets in Key West.