E&E Daily, sub req'd

On several occasions this year, chunks of concrete dislodged from the underbelly of the Frederick G. Gardiner Expressway, an elevated highway that runs along Toronto's waterfront, and crashed onto the street below.

Engineers determined the 60-year-old overpass that brings hundreds of thousands of cars into the city each day is structurally sound, but safety hazards created by the Gardiner's deterioration have made it painfully clear that the city's ailing transportation system needs a cure.

The Toronto City Council is now considering a plan to spend 505 million Canadian dollars ($513 million) on highway repairs -- up from a budgeted CA$170 million -- over the next 10 years as part of its 2013 budget talks. Some have argued the overpass should be torn down and replaced with a tunnel, but the costs would be astronomical.

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