A 21-year-old who ran a red light at an accident-prone road junction and caused the death of a motorcyclist on Friday had his two-week jail term dropped on appeal.

In allowing Iskandar Abdollah's appeal, the High Court considered that the full-time national serviceman had not deliberately sped through the junction of Victoria Street and Rochor Road in 2011 - the same site of a 2012 accident involving a speeding Ferrari and a taxi that left three people dead and two injured.

But the court increased a five-year driving ban to seven years and doubled Iskandar's $4,000 fine for causing grievous injury to his victim's pillion rider.

Then 19, Iskandar was driving four friends home in the early hours of May 16, 2011 when his Hyundai ran the light and rammed into Mr Yogesvaran Ganesan's motorcycle. The Malaysian, 23, died on the spot.

Iskandar claimed trial, claiming that the light was actually green in his favour, but was convicted last October of negligently causing Mr Yogesvaran's death. His appeal against conviction was dismissed on Friday.

An overhead traffic light was installed at the junction in 2012, in the wake of the Ferrari incident.