According to a source, Yong died at midnight last night. The cause of death was not disclosed.
Yong had made headlines earlier this month after the accident.
He and his maid, who was a passenger in the car, suffered multiple injuries and were sent to University of Malaya Medical Centre for treatment.
A witness civil engineer Pram Velauthan Gopal told the Star at the time that the construction site had used plastic barriers instead of concrete ones.
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