(625 ILCS 5/11-704)
(from Ch. 95 1/2, par. 11-704)
When overtaking on the right is permitted.
(a) The driver of a vehicle with 3 or more wheels may overtake and pass
upon the right of another vehicle only under the following conditions:
1. When the vehicle overtaken is making or about to make a left turn;
2. Upon a roadway with unobstructed pavement of sufficient width for
two or more lines of vehicles moving lawfully in the direction being
traveled by the overtaking vehicle.
3. Upon a one-way street, or upon any roadway on which traffic is
restricted to one direction of movement, where the roadway is free from
obstructions and of sufficient width for 2 or more lines of moving
(b) The driver of a 2 wheeled vehicle may not pass upon the right of any
other vehicle proceeding in the same direction unless the unobstructed
pavement to the right of the vehicle being passed is of a width of not less
than 8 feet.
(c) The driver of a vehicle may overtake and pass another vehicle upon
the right only under conditions permitting such movement in safety. Such
movement shall not be made by driving off the roadway.
(Source: P.A. 84-873.)