http://www.mymrt-underground.com.my/ MMC-Gamuda built the Bukit Berapit Rail Tunnel, Southeast Asia's longest rail tunnel, as part of the 329 kilometers Ipoh-Padang Besar Electrified Double Tracking Project and the Stormwater Management and Road Tunnel (SMART) motorway, the first-of-its-kind dual-purpose tunnel in the world.