A construction company supervisor who punched a motorist on the face in a road rage incident was jailed for three weeks on Friday.

Lionel Goh Joon Hwee, 24, admitted to causing hurt to Mr Tan Poh Kim, 50, a supplier, at the traffic light junction of Compassvale Road and Sengkang East Avenue on Dec 22 last year.

The court heard that Goh was a passenger in Mr Vincent Lin Minsheng's car, which was on the extreme right lane of Compassvale Road that evening.

The lane allowed vehicles to turn right into Sengkang East Avenue or continue straight along Compassvale Road.

The traffic light was red but the arrow for right turns was green.

As Mr Lin wanted to travel straight, his car remained stationary at the junction.

Mr Tan, who was behind, wanted to turn right and so flashed his high beam several times, and also used his hands to gesture the driver to move along.

This angered both Mr Lin and Goh. They got out of their car and approached the victim. Mr Tan wound down his window and a verbal altercation ensued.

Goh challenged the victim to step out of his car. As he was doing so, Goh pulled the victim's shirt collar, scolded him and challenged him to a fight.

The victim tried to take out his mobile phone to snap a photograph of Goh's aggressive actions. This agitated Goh further and he gave the victim a punch on the face. Mr Lin stepped in and restrained Goh from further hitting the victim.

After being investigated for the offence, Goh committed another road rage case in March this year, but this charge was taken into consideration during sentencing.

Goh could have been jailed for up to two years and/or fined up to $5,000 for voluntarily causing hurt.