BOWLING GREEN, Va. (CBSNewYork/AP) — A trial has been postponed for the driver of an interstate bus that crashed in Virginia in May, killing four passengers and injuring dozens more.

Caroline County Commonwealth’s Attorney Tony Spencer says the trial for Kin Yiu Cheung of Flushing, Queens will begin March 7. Cheung was scheduled to go on trial Thursday on four felony counts of involuntary manslaughter.

Cheung was driving a Sky Express operated bus headed to Chinatown from North Carolina when it swerved off the road and overturned on I-95 in Virginia on May 31, 2011.

Killed were 46-year-old Karen Blyden-Decastro of Cambria Heights, NY, 63-year-old Sie Giok Giang of Philadelphia, 78-year-old Josefa Torres of Jamaica, NY and 25-year-old Denny Estefany Martinez of Jersey City, NJ.

Fifty-four others were injured.

Court records show Cheung admitted to police that he fell asleep at the wheel.

After the crash, the U.S. Department of Transportation shut down North Carolina-based Sky Express for multiple safety violations.

He faces up to 10 years in prison for each count if convicted.

Cheung has pleaded not guilty.

(TM and Copyright 2012 CBS Radio Inc. and its relevant subsidiaries. CBS RADIO and EYE Logo TM and Copyright 2011 CBS Broadcasting Inc. Used under license. All Rights Reserved. This material may not be published, broadcast, rewritten, or redistributed. The Associated Press contributed to this report.)

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