Complex sentence: The Lane Cove Tunnel opened on Sunday 25 March 2007, which linked the M2 at Lane Cove and carries about 50,000 vehicles per day on the Sydney Orbital Network.
Split into simpler sentences: The Lane Cove Tunnel, which linked the M2 at Lane Cove, opened on Sunday 25 March 2007. It carries about 50,000 vehicles per day on the Sydney Orbital Network.