natural accumulation doctrine
natural-accumulation doctrine. The rule that a governmental entity or other landowner is not required to remove naturally occurring ice or snow from public property, such as a highway, unless the entity has, by taking some affirmative action (such as highway construction), increased the travel hazard to the public. [Cases: Automobiles 262; Municipal Corporations 773. C.J.S. Motor Vehicles § 453; Municipal Corporations § 727.]