The S.C. Supreme Court ruled today that the state Department of Transportation is not legally liable for a 1999 accident in which three Goose Creek residents died after a train struck their car.

Valerie Marie Platt, William Clay Corley and their 4-year-old son William Corley Jr. died instantly when a CSX freight train hit their car after it stopped on the tracks, near a traffic light at Red Bank Road and U.S. Highway 52.

A guardian for the car's only survivor, Asia Platt -- who was 7 years old when she was badly injured in the crash -- sued both CSX and DOT.

CSX settled the case against it, Platt's attorney David Savage said, adding that the settlement details are confidential.

Savage continued to press the case against DOT, arguing it should have better coordinated the stoplight at that intersection with the railroad warning devices.

Circuit Judge Roger Young ruled in favor of DOT before the case went to trial, saying that the state's only job was to warn CSX railroad of any defects in its warning system -- and it had done that job.

The S.C. Court of Appeals upheld Young's ruling, and today, the S.C. Supreme Court upheld both of their decisions.

Read more in tomorrow's Post and Courier.