In Florida, there is a rebuttable presumption that the rear driver caused a rear-ending car accident–that the rear driver’s negligence was the sole proximate cause of a collision. When this rule was put in place, Florida was a contributory negligence state. That meant that when a plaintiff was at all at fault, the defendant could use the plaintiff’s negligence to show he or she should not recover any damages, even when the plaintiff was only slightly at fault.
Last year, the Florida Supreme court decided a rear-ending car accident case that clarified what the rear end presumption means today when contributory negligence is no longer a bar against a plaintiff’s recovery of damages in an auto accident. In that case, a motorcycle passenger was injured when the motorcycle driver unsuccessfully tried to avoid crashing into the rear end of the defendant’s car. The car was driving 35 miles per hour down the road when he unexpectedly slammed on his brakes for no observable reason.
South Florida Personal Injury Lawyers Blog

