Seemingly, the cyclist had run three successive red lights before finding himself "unable to stop" and ploughing into multiple pedestrians at a junction. "Unable to stop" plainly translates to "driving too fast" in this case.
Running multiple red lights, as the cyclist seems to have accepted by the plea bargain, is a mark of reckless irresponsibility on behalf of the cyclist, as is his admittedly excessive speed. Cyclists have obligations towards pedestrian safety in the same way that motor vehicle drivers have too.
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