Final answer:
In most jurisdictions, it is false that three motorcyclists can ride side-by-side in a single lane. Traffic laws generally require motorcycles and other vehicles to ride in a single-file line within the lane.
Step-by-step explanation:
In most jurisdictions, it is false that three motorcyclists can ride side-by-side in a single lane. The majority of traffic laws around the world generally require motorcycles and other vehicles to ride in a single-file line within the lane. This is to ensure that there is enough space for other vehicles to pass safely and to prevent congestion on the road.
However, there can be exceptions to this rule in certain states or countries where motorcycle lane splitting is legal. Lane splitting allows motorcyclists to ride between lanes of slow or stopped traffic. Nonetheless, it is important to check and adhere to the specific traffic laws of the jurisdiction in question.