Final answer:
Cyclists do not have to keep right if they are passing a vehicle or have a narrow lane to themselves.
Step-by-step explanation:
In traffic laws, cyclists are required to keep right if they are sharing the road with other vehicles. However, if cyclists are passing a vehicle or if the lane is too narrow to share, they are not required to keep right.
This rule ensures the safety of both cyclists and drivers. By allowing cyclists to take the whole lane when necessary, it reduces the risk of accidents caused by vehicles passing too closely to cyclists. It also gives cyclists the necessary space to maneuver and maintain their balance.
For example, if a cyclist is riding down a narrow road where there is not enough room for a car and a bicycle side by side, the cyclist can position themselves in the center of the lane to ensure their safety.