The Rainbow Bridge is a big bridge. 

The Rainbow Bridge is a big steel bridge. 

The Rainbow Bridge is a steel arch bridge. 
Why is it called the Rainbow Bridge? People see rainbows near the falls often. This is because of the water spray and mist in the air. 
An older bridge stood near this site. It was called the Honeymoon Bridge. That bridge fell down in 1938. This happened because of an ice jam in the river.
Richard Lee designed the new bridge. Work began in May 1940. The bridge opened on November 1, 1941. On the Canadian side, there is a Rainbow Tower. The tower has a carillon. A carillon is a set of bells that plays music. The bells play several times each day.
Cars and people can cross the bridge. Bicyclists pay a small toll. Trucks are not allowed to use this bridge. They must use the Lewiston-Queenston Bridge instead.
Caption: The Rainbow Bridge spans the river. Caption: A view of the bridge from an old photo. Caption: A map showing the area.
The Rainbow Bridge is a famous steel arch bridge. 
Building this bridge was a big project. It was built near the site of the old Honeymoon Bridge. That bridge fell into the river in 1938. An ice jam in the Niagara Gorge caused that collapse. An architect named Richard Lee designed the new steel bridge. He also designed the Lewiston-Queenston Bridge downriver. Another architect, William Lyon Somerville, worked on the Canadian side. He designed the Rainbow Tower and the plaza there.
History shows how important this site is. In 1939, King George VI and Queen Elizabeth visited Niagara Falls. They were on a royal tour of Canada. They dedicated the site where the bridge would be built. A monument was made later to remember this visit. Construction on the bridge finally began in May 1940. The bridge officially opened on November 1, 1941. 
Many different people use the bridge today. Cars can cross the bridge for a toll. The cash toll for a personal vehicle is $8.50 CAD. Bicyclists pay a toll of $1.00 USD or $1.00 CAD. Pedestrians only pay if they leave from Canada. They pay $1.00 USD or $1.25 CAD. Commercial trucks are not allowed on this bridge. They must use the Lewiston-Queenston Bridge instead.
The bridge is part of many road systems. In New York, it connects to routes 104 and 384. It also meets the Niagara Scenic Parkway. In Ontario, it is part of Highway 420. The Rainbow Tower on the Canadian side is very special. It houses a carillon, which is a set of bells. These bells play music several times every day. It is a beautiful part of the bridge area. 
The Niagara Falls International Rainbow Bridge is a significant steel arch bridge. 
The construction of this bridge was a response to a previous disaster. An earlier structure called the Honeymoon Bridge once stood near this site. That bridge collapsed in 1938. An ice jam in the Niagara Gorge caused the collapse. To replace it, architect Richard (Su Min) Lee designed a new steel arch bridge. He also used this same design for the Lewiston-Queenston Bridge located downriver. On the Canadian side, architect William Lyon Somerville designed the plaza complex. He was also responsible for the Rainbow Tower. 
History played a major role in the bridge's early years. In 1939, King George VI and Queen Elizabeth visited Niagara Falls. They were traveling as part of a royal tour of Canada. During this visit, they dedicated the future construction site of the bridge. A monument was later built to commemorate this royal event. Construction on the actual bridge began in May 1940. The bridge officially opened to the public on November 1, 1941.
The bridge is an open-spandrel deck arch bridge. This means the structure uses arches to support the roadway. It is part of several different transportation networks. In the United States, the New York State Department of Transportation calls it an unsigned reference route. It connects to New York routes 104 and 384. It also connects to the Niagara Scenic Parkway. In Canada, the Ontario Ministry of Transportation includes the bridge as part of Highway 420.
Many different types of travelers use the Rainbow Bridge. However, the bridge does not permit commercial trucks. Large trucks must use the Lewiston-Queenston Bridge instead. For personal vehicles, the cash toll is $8.50 CAD. Bicyclists pay a toll of either $1.00 USD or $1.00 CAD. Pedestrians only pay a fee if they are departing from Canada. Those pedestrians pay $1.00 USD or $1.25 CAD. 
The bridge area also contains unique landmarks and recent changes. The Rainbow Tower on the Canadian side houses a carillon. A carillon is a musical instrument made of bells. These bells play music several times every day. Traffic patterns on the bridge can also change due to external events. In February 2025, cross-border traffic declined significantly. This happened after a trade war began. During that month, 23% fewer Canadians returned home across the bridge.
Safety and incidents are also part of the bridge's history. On November 22, 2023, a serious accident occurred at the American side border crossing. A 2022 Bentley Flying Spur was traveling at high speed. The vehicle left the roadway and went airborne. It crashed and exploded at the crossing. The crash resulted in the deaths of two occupants. A U.S. Customs and Border Protection officer was also injured. Investigators first looked into the crash as a potential terrorist attack. However, they later determined it was an unintentional crash. 
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