Which is the longest road bridge in the world?
The six-lane elevated Bang Na Expressway in Bangkok, Thailand is recognised by the Guinness World Records as the 'longest road bridge', spanning a distance of 54 kilometres.  Two elevated toll plaza structures are included in the project, where the bridge widens to accommodate twelve lanes. The $1 billion (about ₹6,600 crore) bridge was opened in February 2000.