The rule

Two bike riders are allowed to travel side-by-side, known as two abreast, if they are no more than 1.5 metres apart.

It is legal in any traffic lane on single and multi-lane roads.

It is not legal for more than two riders to travel together side-by-side, but a third rider can overtake riders who are two abreast.

The concerns

Some people get frustrated when bike riders are two abreast. They believe it is bad for traffic flow and makes it too hard to pass.