Isaiah D. Hart Bridge | |
|---|---|
 The Hart Bridge from the south bank | |
| Coordinates | 30°18′54″N81°37′36″W / 30.315°N 81.6266°W /30.315; -81.6266 |
| Carries |    US 1 Alt. /SR 228(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 |
| Characteristics | |
| Design | Continuous truss bridge |
| Total length | 1,171.7 metres (3,844 ft) |
| Width | 19.7 metres (65 ft) |
| Longest span | 331.6 metres (1,088 ft) |
| Clearance above | 6.14 metres (20.1 ft) |
| Clearance below | 42.9 metres (141 ft) |
| History | |
| Opened | November 2, 1967 (1967-11-02) |
| Location | |
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TheIsaiah David Hart Bridge is atruss bridge that spans theSt. Johns River inJacksonville, Florida. It carriesU.S. Route 1 Alternate (US 1 Alt.) andState Road 228 (SR 228). It is named afterIsaiah Hart, the founder of Jacksonville and is often referred to as the Hart Bridge. It was designed bySverdrup & Parcel.[1] The Hart Bridge is one of the longest truss bridges in the world, and has the world's thirdlongest main span of any truss bridge.
The Isaiah David Hart Bridge was completed in 1967 at a cost of $8.83 million. The official name of the bridge is the Isaiah David Hart Bridge after the founder of Jacksonville,Isaiah Hart. The bridge was built on a bond to be paid off with tolls until they were lifted in 1989. The bridge helped relieve congestion from theMathews Bridge and theMain Street Bridge.[2] In 1999 the Hart Bridge was ranked 19th as one of the longestcantilever bridges in the world.[3]
The bridge has traditionally been painted green and is often referred to as "The Green Monster" by locals.[4][5] Daily traffic averages 52,000 vehicles.[6] The stretch of highway between downtown andBeach Boulevard is known as the Commodore Point Expressway, but more commonly referred to by locals as the Hart Bridge Expressway.
The bridge is a steelcantilever bridge which is a type ofcontinuous 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.
Crossings of theSt. Johns River | ||||
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