Torts — Automobile accident — Negligence — Proximate cause — Claim that homeowner’s association, which allowed street parking in contravention of rules, was the proximate cause of a rear-end collision which occurred while plaintiffs were stopped waiting for another vehicle to pass through parked cars on the street — While association’s failure to enforce parking rules was a cause-in-fact of the accident, its negligence only furnished the occasion for the negligence of the driver that struck plaintiffs — Driver’s negligence was not reasonably foreseeable by association, and the failure to enforce parking rules was not the proximate cause of plaintiffs’ injuries