The Moroun family, owners of the Ambassador Bridge, have raised yet another challenge to the construction of a rival bridge — the Gordie Howe International Bridge.

This week, Canada's ambassador to the United States said his fellow Canadian officials are within weeks of issuing a long-awaited request for proposals that will seek a team to build the Gordie Howe International Bridge and disrupt the Ambassador Bridge's long-standing bridge monopoly.

The Ambassador Bridge has begun a new toll system for commercial vehicles, designed to ease congestion, according to the bridge’s owners.

The owners of the Ambassador Bridge connecting Detroit and Windsor, Ontario, have been sued by homeowners on the Canadian side for turning a neighborhood into a “slum” in pursuit of a second span, the Windsor Star reported.

Tolls on the Ambassador Bridge connecting Detroit and  Windsor, Ontario, rose 25 cents per axle Thursday for all truck classes, bringing the toll for a 5-axle, 80,000-pound truck to $27.50, the bridge’s owners said.

The city of Windsor, Ontario, said Michigan’s recommendation to allow more hazardous materials to cross the Ambassador Bridge is based on a deficient study that doesn’t consider the 75,000 people in Canada who would be exposed to accident risk.

A study by the Michigan Department of Transportation has recommended lifting the ban against trucking some hazardous materials across the Ambassador Bridge, the busiest crossing along the U.S.-Canada border.

President Obama approved a second bridge connecting Detroit with Windsor, Ontario, at the busiest crossing along the U.S.-Canada border, where a majority of traffic uses the 83-year-old Ambassador Bridge, Bloomberg News reported.