Mr SN Vasutavan, who turns 70 tomorrow, admitted he made an unauthorised left turn, resulting in the collision of his car with the motorcycle of Mr Muhammad Arafat Baharudin, 19, in May last year, The Straits Times reported.
Mr Arafat subsequently died from multiple injuries.
The charge said Mr Vasutavan, travelling with his family members in the car, failed to keep a proper lookout for other road users while making a left turn into the side road leading to the carpark, according to the Singapore Daily.
He was not supposed to make a left turn as the directional arrows on both centre and leftmost lanes of the road indicated that vehicles were permitted to travel only straight.
Mr Arafat, riding at a speed of 102kmh to 107kmh, was flung off the machine and landed on the side road.
Mr Vasutavan has had 10 traffic violations between 1994 and 2013. He compounded the offences, which included speeding, careless driving, making an unauthorised U-turn and illegal parking.
His lawyer Mr Ramesh Tiwary said in mitigation that Mr Vasutavan had checked before he filtered left and did not see the motorcyclist. This was because the rider was going at almost double the speed limit, and this affected his ability to stop.
District Judge Diana Haven Ho has allowed Mr Vasutavan to begin his sentence on September 15.