Canadian Broadcasting Corporation | Australian Broadcasting Corporation | Oracle Corporation | International Finance Corporation | Chevron Corporation | Digital Equipment Corporation | News Corporation | Lockheed Corporation | corporation | Hearst Corporation | Scholastic Corporation | Northrop Corporation | Munhwa Broadcasting Corporation | Gibson Guitar Corporation | CBS Corporation | Fender Musical Instruments Corporation | ITT Corporation | Sharp Corporation | RAND Corporation | NCR Corporation | Federal Deposit Insurance Corporation | Sperry Corporation | Singer Corporation | Case Corporation | Science Applications International Corporation | Polaroid Corporation | Multinational corporation | Burroughs Corporation | Bendix Corporation | Olympus Corporation |
Construction of the tunnel was started in 2008 by a joint venture of MMC Corporation Berhad and Gamuda Berhad as part of their electrified double tracking project between Ipoh and Padang Besar and is expected to complete by 2013.