The overhead bridge was about 50m away but Ms Chew Ah Hoy, 75, opted to walk across the four-lane Changi Road at around 9.40am on Oct 8 last year.
This proved fatal. As she crossed the road, a car driven by Zelig Tan Tze Li, 35, hit her and she died three hours later.
Tan was jailed for two weeks and disqualified from driving for five years yesterday for negligent driving, resulting in her death.
Shortly before the accident, Tan was driving in the direction of Geylang Road while on his way to work at the Millage condominium in Changi Road when he switched to the extreme right lane to make a turn.
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Ms Chew was then crossing the road near a Caltex petrol station from Tan's left to his right.
She was walking at a normal pace. The court heard that Tan did not notice Ms Chew crossing the road in front of him at any point.
The speed limit there was 70kmh and Tan said he was not speeding. Ms Chew was flung forward and Tan's car swerved to the left.
He called the police at about 9.40am, saying: "An old lady dashed out (onto) the road and I hit her."
According to court documents, there were no traffic lights at the location.
Ms Chew suffered head injuries and an ambulance took her to Changi General Hospital, where she died later.
After the accident, Tan's car was found with cracks on the right side of the front windscreen and right front headlamp. For committing a negligent act causing a fatal accident, he could have been jailed for up to two years and fined.