When Overtaking on the Right is Permitted. (a) The operator of a motor vehicle may overtake and pass to the right of another vehicle only under the following conditions: (1) When the vehicle overtaken is in a designated left-turn lane (including the middle lane of a three-lane highway), or is making or about to make a left turn and is not approaching within 100 feet of an intersection. (2) Upon a highway with unobstructed pavement of sufficient width for two or more lanes of vehicles moving lawfully in the direction being traveled by the overtaking vehicle. (3) When the action is necessary to avoid an accident or otherwise protect life or property. (4) When the other vehicle is disabled and there is no reasonable way to pass to the left of the other vehicle. (b) The operator of a motor vehicle may overtake and pass another vehicle upon the right only under conditions permitting the movement in safety. In no event shall the movement be made by driving off the pavement or main-traveled portion of the highway. (c) The provisions of this section do not relieve the operator of a slow moving vehicle from the duty to drive as close as practicable to the right-hand edge of the highway. Source: PL 3-61, § 1 (§ 517); amended by PL 4-56, § 1.