A HIGH Court judge has quashed two convictions for careless driving and ordered that fines totalling $6,000 and costs totalling $4,500 should be refunded. In a reserved judgement handed down yesterday, Mr Justice Ryan allowed the appeal against conviction of taxi driver Mr Wong Ping-chung, whose taxi knocked down and killed a teenage schoolboy who ran in front of the car. He also allowed the appeal of Mr Yeung Koon-ming, who had been convicted of careless driving after his car was in a collision with an elderly man pushing a handcart. The man died from his injuries. Both appellants had been convicted by Magistrate Mr David Thomas. The High Court was told Mr Thomas found Mr Wong had been driving at about the speed limit of 50 km/h when he knocked down schoolboy Wong Kwok-fai. But Mr Justice Ryan said he disagreed with the magistrate's ruling that in the circumstances driving in the region of the speed limit was too fast. The court heard that on May 24, last year, Kwok-fai was one of three boys travelling on a bus along Ting Kok Road in the New Territories, on their way to the beach. The bus stopped and Kwok-fai ran in front of it to cross the road. He ran in the path of the taxi being driven by Mr Wong, who was overtaking the stationary bus. Allowing Mr Wong's appeal and ordering a fine of $3,500 and costs of $2,000 to be refunded, Mr Justice Ryan said: ''It is clear that the deceased dashed out from close to the front of the bus into the path of the appellant's taxi, giving the appellant notime to stop to avoid him. ''To have had any chance of doing so, the appellant would have needed to be travelling at a crawl with his foot poised over the brake.'' He added: ''It is in my view unreasonable to expect such a standard of perfection. Regard also has to be had of the duty the appellant had to other drivers to complete the overtaking as quickly as was safely possible.'' The judge also allowed the appeal against conviction of Mr Yeung and ordered a fine of $2,500 and costs of $2,500 to be returned to him. The court was told that at about 2.50 am on April 2, last year, Mr Yeung was driving a car along a narrow road in the New Territories. His car was in a collision with an elderly pedestrian pushing a loaded handcart. Mr Yeung gave evidence that he had seen a person pushing a handcart about nine to 12 metres away. Magistrate Mr Thomas had stated that a reasonable and prudent road user would have proceeded past a pedestrian with a handcart on a narrow road at night at a very slow speed. He found the appellant had not driven at a speed which would have allowed him to pull up safely. But Mr Justice Ryan said the evidence of Mr Yeung was that the elderly man had swerved into his car to avoid a pile of wood, giving him no chance to brake or swerve.