Bangladesh, July 15 -- More than one-fifth of the bearing pads on Dhaka's MRT Line-6 have been found defective, forcing speed restrictions and raising wider concerns over the structural integrity of Bangladesh's first metro-rail system.Geographic

Advertisement Trains have been slowed to as little as 40km/h at several locations, just 30 months after the country's first metro line began operations.

The Dhaka Mass Transit Company Limited (DMTCL) has reduced train speeds at several points along the 20.1-kilometre elevated corridor from the designed operating speed of more than 100 km/h after an expert inspection detected serious defects in bearing pads, pier heads, box girders and station structures.

According to the technical expert com...