(1) A driver on a multi-lane road must drive so the drivers vehicle is completely in a marked lane, unless the driver is (a) entering a part of the road of one kind from a part of the road of another kind (for example, moving to or from a service road or a shoulder of the road); or(b) entering or leaving the road; or(c) moving from one marked lane to another marked lane; or(d) avoiding an obstruction; or(e) obeying a traffic control device applying to the marked lane; or(f) permitted to drive in more than one marked lane under another provision of the Road Rules or under another law of this jurisdiction.
Note 1 : Drivers vehicle , marked lane , multi-lane road , obstruction , service road and traffic control device are defined in the dictionary and shoulder is defined in rule 12 .
Note 2 : A driver is generally not permitted to move from one marked lane to another marked lane across a continuous line separating the lanes see rule 147 .
Note 3: Rule 148 deals with giving way when moving from one marked lane to another marked lane.
Note 4: An overhead lane control device may require a driver to leave a marked lane see rule 152 .
Note 5: Drivers of certain long vehicles are permitted to use 2 marked lanes when turning at an intersection see rule 28 (left turns) and rule 32 (right turns).
(2) A driver on a road with 2 or more lines of traffic travelling in the same direction as the driver, but without marked lanes, must drive so the drivers vehicle is completely in a single line of traffic unless (a) it is not practicable to drive completely in a single line of traffic; or(b) the driver is entering a part of the road of one kind from a part of the road of another kind (for example, moving to or from a service road or a shoulder of the road); or(c) the driver is entering or leaving the road; or(d) the driver is moving from one line of traffic to another line of traffic; or(e) the driver is avoiding an obstruction.