(a) An operator on a roadway divided into two or more clearly marked lanes for traffic:
(1) shall drive as nearly as practical entirely within a single lane; and
(2) may not move from the lane unless that movement can be made safely.
(b) If a roadway is divided into three lanes and provides for two-way movement of traffic, an operator on the roadway may not drive in the center lane except:
(1) if passing another vehicle and the center lane is clear of traffic within a safe distance;
(2) in preparing to make a left turn; or
(3) where the center lane is designated by an official traffic-control device for movement in the direction in which the operator is moving.
(c) Without regard to the center of the roadway, an official traffic-control device may be erected directing slow-moving traffic to use a designated lane or designating lanes to be used by traffic moving in a particular direction.
(d) Official traffic-control devices prohibiting the changing of lanes on sections of roadway may be installed.
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