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RICHARDSON A routine call to help a disabled vehicle ended in a fatal crash on the President George Bush Turnpike in Richardson early Sunday morning.

The Texas Department of Public Safety said a North Texas Tollway Authority customer service truck pulled over to help the motorist, with its lights flashing and an electric "arrow board" directing traffic around the stranded vehicle on the highway's left shoulder near the Renner Road exit.

DPS Sgt. Lonny Haschel said the driver of an eastbound Ford Focus crossed a solid yellow line on the shoulder and crashed into the back of the NTTA vehicle.

The driver of the Focus was killed; the NTTA employee and the motorist being helped were not injured.

Haschel said there were no initial indications that the driver of the Ford had been intoxicated, but he said the cause of the crash remains under investigation.

The identity of the driver who died was not available.

Eastbound traffic on the Bush Turnpike was diverted for several hours after the accident.

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