§ 31-5-209 — Driving on roadways laned for traffic

(a) Whenever any roadway has been divided into two (2) or
more clearly marked lanes for traffic the following rules in
addition to all others consistent herewith shall apply:
(i) A vehicle shall be driven as nearly as
practicable entirely within a single lane and shall not be moved
from the lane until the driver has first ascertained that the
movement can be made with safety;
(ii) Upon a roadway which is divided into three (3)
lanes and provides for two-way movement of traffic, a vehicle
shall not be driven in the center lane except when overtaking
and passing another vehicle traveling in the same direction when
the center lane is clear of traffic within a safe distance, or
in preparation for making or completing a left turn or where the
center lane is at the time allocated exclusively to traffic
moving in the direction the vehicle is proceeding and the
allocation is designated by official traffic-control devices;
(iii) Official traffic-control devices may be erected
directing specified traffic to use a designated lane or
designating those lanes to be used by traffic moving in a
particular direction regardless of the center of the roadway and
drivers of vehicles shall obey the directions of every such
device;
(iv) Official traffic-control devices may be
installed prohibiting the changing of lanes on sections of
roadways and drivers of vehicles shall obey the directions of
every such device.