Kan. Admin. Regs. § 39-1-13
Lane traffic (the right to drive in right or left lane of traffic going in the same direction) is authorized on the Kansas turnpike. A vehicle shall be driven as nearly as practicable entirely within a single lane, and shall not be moved from such lane until the operator has first ascertained that such movement can be made with safety. A driver of a vehicle may overtake and pass upon the right or left side of another vehicle only when this can be done by staying within lane 1 and 2, but said overtaking and passing cannot be done if the driver has to drive off the main portion of the turnpike. Any driver of a vehicle intending to change lanes shall give proper and sufficient signal of intention to turn right or left before making said lane change, then yield right-of-way.
Kan. Admin. Regs. § 39-1-13