According to Wikipedia encyclopedia, the Frankford Avenue Bridge in Philadelphia is the oldest (see: http:/en.wikipedia.org/wiki/Frankford_Avenue_Bridge). According to this article, the bridge was built in 1697 or 1698. It is also known as the Pennypack Creek Bridge, the Holmesburg Bridge, and the King's Highway Bridge (probably it's original name).
*Actually this answer is false. The oldest bridge in the US is the old stone arch bridge next to the jewel mill (glen mill) in Rowley, MA. Built in 1643 and is still in use today.
mackinac bridge
No, it is the 7th longest bridge in the world, and the 2nd longest bridge over water.
The worlds longest road bridge is in China
Kinniya bridge. Nearly 300m on A 15 road. And longest steel bridge is kallady bridge, Batticaloa.
The longest railway bridge in the country of India is the Vembanad rail bridge. It is located in the state of Kerala.
mackinac bridge
The Causeway bridge is the longest bridge in Louisiana.
Swing Bridge at New Bridge Landing was created in 1888.
Whitby Swing Bridge was created in 1909.
Alloa Swing Bridge was created in 1885.
Montrose Swing Bridge was created in 1910.
Sale Swing Bridge was created in 1883.
Wasauksing Swing Bridge was created in 1912.
I think it's the New River Gorge Bridge in West Virginia.
the longest bridge in nz is the Auckland harbour bridge
No. Sydney Harbour Bridge is not the longest bridge, by any means. It is the largest steel arch bridge in the world, but it is not the longest.
The longest bridge in Michigan, the Mackinac Bridge, links Michigan's upper and lower peninsulas. The Mackinac Bridge is the longest bridge in the western hemisphere.