Muthukumaraswamy (65) and his wife were returning to Tiruvarur after attending a function at a relative's house here when the mishap occurred.
He was driving the car, police said.
They said the car hit the wall of the bridge at Grand Anaicut canal near a bypass road and burst into flames, killing him on the spot.
Fire force personnel rushed to the spot, doused the flames and retrieved the body of Muthukumarasamy.
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