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Hart Bridge

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Isaiah D. Hart Bridge
The Hart Bridge from the south bank
Coordinates30°18′54″N 81°37′37″W / 30.315°N 81.627°W / 30.315; -81.627
Carries
US 1 Alt. / SR 228
(four general purpose lanes)
CrossesSt. Johns River
LocaleJacksonville, Florida
Official nameIsaiah David Hart Bridge
Maintained byFlorida Department of Transportation
ID number720107
Characteristics
DesignContinuous truss bridge
Total length1171.7 meters (3844 feet)
Width19.7 meters (65 feet)
Longest span331.6 meters (1088 feet)
Clearance above6.14 meters (20.1 feet)
Clearance below42.9 meters (141 feet)
History
OpenedNovember 2, 1967 (1967-11-02)

The Isaiah David Hart Bridge is a truss bridge that spans the St. Johns River in Jacksonville, Florida. It carries U.S. Route 1 Alternate/State Road 228. It is named after Isaiah Hart, the founder of Jacksonville. It was designed by Sverdrup & Parcel.[1]

Details

The bridge has traditionally been painted green and is often referred to as "The Green Monster" by locals.[2][3] The westbound end of the bridge delivers drivers to downtown Jacksonville or Martin Luther King Expressway, while the eastbound end sends motorists to Beach Boulevard. Daily traffic is 47,000 vehicles.[citation needed] The stretch of highway between downtown and Beach Blvd. is known as the Commodore Point Expressway, but more commonly referred to by locals as the Hart Bridge Expressway.

The bridge is a steel cantilever bridge which is a type of continuous truss bridge. The bridge's main span is uncommon for a cantilever bridge in that the truss over the main channel tapers upward and the roadway below is suspended from the truss by steel hangers.

References

  1. ^ Durkee, Jackson, "World's Longest Bridge Spans", National Steel Bridge Alliance, May 24, 1999
  2. ^ "SUNDAY MORNING RIVER RUNNER". Jacksonville.com.
  3. ^ Jax Air News