Transport Infrastructure Development Corporation (TIDC) is a State owned corporation, which has been established to develop major transport infrastructure projects for NSW.

TIDC's aim is to cost effectively deliver transport solutions that support the growth of NSW, enhance its natural and urban environments and incorporate the best standards and technology.

TIDC is currently working to deliver the Rail Clearways program and the Epping to Chatswood Rail Line.

The Epping to Chatswood Rail Line is the largest publicly funded infrastructure project underway in NSW.  Since construction began in late 2002 significant progress has been made, with almost half of the tunnelling completed and all three new underground stations on the rail line excavated.  Construction is on schedule for completion in mid-2008.