120 N.W.2d 444 DOROTHY RITCHIE, appellant, v. AUGUST SCHAEFER, appellee. EDWARD RITCHIE, appellant, v. AUGUST SCHAEFER, appellee. No. 50912.Supreme Court of Iowa. March 12, 1963. MOTOR VEHICLES: Statutory violation — negligence per se. 1 Violation of a statute which fixes the standard of care for motorists is negligence per se unless a legal excuse for […]