Rules for traffic lanes
15(1) When operating a vehicle on a highway,
(a) in the case where double solid lines exist between traffic
lanes, a person shall not drive the vehicle so that the
vehicle or any portion of the vehicle crosses the double
solid lines from one traffic lane to another;
(b) in the case of a highway in an urban area where a single
solid line only exists between traffic lanes, a person shall
not drive the vehicle so that the vehicle or any portion of
the vehicle crosses the single solid line from one traffic
lane to another except when overtaking and passing
another vehicle;
(c) in the case of a highway outside an urban area where a
single solid line only exists between traffic lanes, a person
shall not drive the vehicle so that the vehicle or any
portion of the vehicle crosses the single solid line from
one traffic lane to another;
(d) in the case where a single solid line and a broken line
exist together between traffic lanes, a person
(i) shall not, except as permitted under subclause (ii),
drive the vehicle so that the vehicle or any portion of
the vehicle crosses the solid line from the traffic lane
next to which the solid line is located, and
(ii) may only drive the vehicle so as to cross to the left
over the broken and solid lines from the traffic lane
next to which the broken line is located for the
purpose of and when overtaking and passing another
vehicle in that traffic lane and shall, as soon as that
other vehicle is safely passed, recross both lines and
return to the traffic lane on the right in which that
person’s vehicle was originally travelling;
(e) in the case where
(i) the roadway consists of only 2 traffic lanes that carry
traffic in opposite directions, and
(ii) only one or more broken lines exist between the 2
traffic lanes,
a person may only drive the vehicle so as to cross to the
left over the broken line from that person’s traffic lane
into the traffic lane carrying the oncoming traffic for the
purpose of overtaking and passing another vehicle that is
travelling in the right traffic lane and shall as soon as that
other vehicle is safely passed return to the traffic lane in
which that person’s vehicle was originally travelling;
(f) in the case where
(i) the roadway consists of 2 or more traffic lanes that
carry traffic in one direction only, and (ii) only one or more broken lines exist between the
traffic lanes, a person may, with respect to those traffic lanes, drive the
vehicle so as to cross the broken lines from one traffic
lane into another traffic lane.
*snip*
(5) When a highway has been divided into traffic lanes by clearly
visible lines marked on the road surface, a person driving a vehicle
other than a cycle shall drive the vehicle as closely as practical in
the centre of the traffic lane so marked.