By the way, a 20-mile stretch of the Cross Bronx Expressway in New York was determined to be the most congested traffic corridor in the U.S., taking 54 minutes to traverse at an average speed of just 13 mph, representing a whopping delay of 41 minutes.

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The short-term fix would keep traffic flowing on a critical economic corridor linking Seattle and British Columbia.

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The accident temporarily halted train traffic through a vital East Coast corridor.

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According to stats from the National Highway Traffic Safety Administration (NHTSA), the I-95 corridor between the southeast and New England includes five of the 10 U.S. states carrying the highest fines for speeding--Virginia, Georgia, North Carolina, Maryland and New Hampshire.

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Mr Holley also defended road works in the city centre, in particular the Oystermouth Road corridor, which is the main gateway into Swansea and often suffers from traffic jams.

BBC: Swansea council chief rejects 'unfair' claims over city