A motorist who was allegedly involved in causing the death of four people along Central Expressway (CTE) was charged in court on Friday.

Toh Cheng Yang, 35, who faces two charges, is accused of causing the death of trainee pilot Amron Ayoub, 23, his girlfriend, Ms Song Jisoo, 24, and her parents, Mr Song Jungwoo, 55, and Madam Kim Mee-Kyung, 53, by dangerous driving at 3.54am on Aug 9 last year.

He is said to have driven at an excessive speed over the prescribed limit of 90kmh while under the influence of drugs. He allegedly hit the back of a stationary sport utility vehicle (SUV) which had broken down.

The four who were then standing behind the vehicle were hit.

The three South Koreans died on the spot while Mr Amron died later in hospital.

Toh is also accused of driving his car while under the influence of drugs to such an extent as to be incapable of having proper control of the car which resulted in the collision with the stationary SUV that day.

Toh is represented by Mr Abdul Hamid Sultan.

His case will be mentioned on May 5.

If convicted, Toh faces a jail term of up to five years for causing death by dangerous driving. For driving under the influence of drugs, the maximum penalty is a fine of $5,000 or six months' jail.