Complex sentence: It was also hoped it would reduce the traffic around Southampton with a local commuter line linking the Waterfront to Romsey, Halterworth and Chandler's Ford, the plan failed to come about for reasons unknown.
Split into simpler sentences: It was also hoped it would reduce the traffic around Southampton with a local commuter line linking the Waterfront to Romsey, Halterworth and Chandler's Ford. The plan failed to come about for reasons unknown.