To revamp a chaotic transport system, engineers will blast through granite mountains to extend the metro from Ipanema to Barra da Tijuca, 13.5km (8.4 miles) away.

• 为了改造混乱的交通系统，工程师准备以爆破方式打通花岗岩山区，将目前的地铁从Ipanema延长至BarradaTijuca，全长13.；5公里。