File:Fort Erie Border Crossing, Fort Erie, Ontario (29358777143).jpg

The Peace Bridge is an international bridge between Canada and the United States at the east end of Lake Erie at the source of the Niagara River, about 20 kilometres (12.4 mi) upriver of Niagara Falls. It connects Buffalo, New York, in the United States to Fort Erie, Ontario, in Canada. It is operated and maintained by the binational Buffalo and Fort Erie Public Bridge Authority.

The Peace Bridge consists of five arched spans over the Niagara River and a Parker deck type truss span over the Black Rock Canal on the American side of the river. The length is 5,800 feet (1.77 km). Material used in the construction included 3,500 feet (1.07 km) of steelwork, 9,000 tons of structural steel and 800 tons of reinforcing steel in the concrete abutments. The Peace Bridge was named to commemorate 100 years of peace between the United States and Canada. It was constructed as a highway bridge to address pedestrian and motor vehicle traffic which could not be accommodated on the International Railway Bridge, built in 1873.

The building of the Peace Bridge was approved by the International Joint Commission on August 6, 1925. Edward Lupfer served as chief engineer. A major obstacle to building the bridge was the swift river current, which averages 7.5 to 12 miles per hour (12.1 to 19.3 km/h). Construction began in 1925 and was completed in the spring of 1927. On March 13, 1927, Lupfer drove the first car across the bridge. On June 1, 1927, the bridge was opened to the public.

The official opening ceremony was held two months later, on August 7, 1927, with about 100,000 in attendance. The festivities were transmitted to the public via radio in the first international coast-to-coast broadcast. Newspapers at the time estimated that as many as 50 million listeners may have heard the broadcast.

When the bridge opened, Buffalo and Fort Erie each became the chief port of entry to their respective countries from the other. At the time it was the only vehicular bridge on the Great Lakes from Niagara Falls to New York. The bridge remains one of North America's important commercial ports with four thousand trucks crossing it daily.

The Peace Bridge is one of the busiest on the Canada–United States border, with over one million trucks crossing it each year and delays of up to almost four hours. Other nearby bridges between the United States and Canada include the Rainbow Bridge, the Queenston-Lewiston Bridge and the Whirlpool Rapids Bridge. The Queenston-Lewiston Bridge and the Peace Bridge are the only Niagara River crossings that allow heavy trucks.

There are customs plazas at both ends of the bridge, with the Canadian plaza the newer and larger of the two.

The inbound customs plaza in the United States has seven lanes for trucks and nine for cars. Pedestrians and cyclists are processed to the left of the truck inspection area.

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