[3] King George VI and Queen Elizabeth, during their visit to Niagara Falls as part of their 1939 royal tour of Canada, dedicated the future construction site of the Rainbow Bridge; a monument was later erected to commemorate the occasion.

[5] The New York State Department of Transportation designates the bridge as NY 955A, an unsigned reference route.

Roads that adjoin the bridge include New York routes 104 and 384, and the Niagara Scenic Parkway.

The Rainbow Tower, part of the plaza complex on the Canadian side, houses a carillon, which plays several times daily.

[2] On November 22, 2023, a 2022 Bentley Flying Spur traveling at a high rate of speed left the roadway, went airborne, crashed and exploded at the Rainbow Bridge border crossing on the American side.