A 41-year-old man from Maidenhead has been found guilty of driving without due care and attention.
Jasbinder Dhadli, of Cox Green Lane, had pleaded not guilty to causing a crash at the junction of Frascati Way and Broadway in January last year.
The smash involved a purple Porsche Cayman and a green Suzuki Wagon and caused gridlock as far back as Braywick Roundabout as commuters travelled to work.
Speaking at the trial at Reading Magistrates Court today Mr Dhadli said: "I take care with my driving."
"I could not understand how I could go through a red light and endanger peoples lives."The court was shown CCTV footage which proved the red lamp in the traffic lights was not working at the time of the crash.
But Magistrate Christopher Robinson said Dhadli should have taken more notice of the first set of traffic lights leading up to the junction which were working.
Delivering his verdict he said: "We find the defendant did drive below the standards of a competent driver."
Dhadli received five points on his licence and was fined £400.
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The crash, which took place at about 7am today (Thursday), involved three vehicles. One man sadly died as a result of the collision and his next of kin have been informed.