Thane, Jan. 27 -- A new flyover in Mira-Bhayander, part of Mumbai's Metro Line 9 project, has sparked controversy over a sudden reduction in the number of lanes from four to two, sparking safety concerns and ridicule alike.

A viral video of the project was shared on social media, flagging the abrupt reduction of lanes.

The virality of the video prompted the Mumbai Metropolitan Region Development Authority(MMRDA) to defend the road design and explain the reason behind the lane reduction.

"The flyover does not 'suddenly narrow.' The transition from 4 lanes to 2 lanes is not a design flaw, but is based on available road width constraints and future network planning," they said in a statement on X.

"Provision has been kept for future wide...