Hart Bridge
Isaiah D. Hart Bridge
The Hart Bridge from the south bank
Coordinates 30°18?54?N 81°37?36?W / 30.315°N 81.6266°W / 30.315; -81.6266Coordinates: 30°18?54?N 81°37?36?W / 30.315°N 81.6266°W / 30.315; -81.6266
(four general purpose lanes)
Crosses St. Johns River
Locale Jacksonville, Florida
Official name Isaiah David Hart Bridge
Maintained by Florida Department of Transportation
ID number 720107
Design Continuous truss bridge
Total length 1171.7 meters (3844 feet)
Width 19.7 meters (65 feet)
Longest span 331.6 meters (1088 feet)
Clearance above 6.14 meters (20.1 feet)
Clearance below 42.9 meters (141 feet)
Opened November 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 (US 1 Alt.) and State Road 228 (SR 228). It is named after Isaiah Hart, the founder of Jacksonville. It was designed by Sverdrup & Parcel.[1]


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.[] 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.

See also


  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

External links

  This article uses material from the Wikipedia page available here. It is released under the Creative Commons Attribution-Share-Alike License 3.0.



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