The seven bridges are out of the 20, which, the PWD has classified as "distressed" structures.
The seven bridges labelled as "most vulnerable" are Bijon setu, Gouribari Aurobindo Setu, Belgachhia bridge, Tollygunge Circular Road bridge, Dhakuria bridge, Tallah bridge and Santragachi bridge, the PWD official told PTI.
The Kolkata Police has already banned movement of all goods vehicles on the first four bridges and is exploring the possibility whether a similar decision can be taken for the remaining ones, a senior officer of Kolkata Traffic Police said.
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