Working a loaded boat through the tunnel took about 4 hours, and this caused congestion.

The decreasing circle of the attacking forces also caused congestion.

They complained the high school would cause congestion and lower their property values.

Food vendors can cause congestion, too, and there is no question the industry needs regulating.

Others, she said, might take to their own cars, raising environmental concerns and causing congestion.

That volume causes congestion, but it is not the only factor.

Vehicles can cause congestion while standing between journeys and when turning.

They also said the construction project would cause congestion in a neighborhood of mostly single-family homes.

The many vehicles on the roads cause major congestion during peak times throughout the city.

But some local residents have opposed a new bridge, because they fear it will cause congestion and pollution.