Final answer:
Slow moving vehicles must pull off at the nearest turnout when five or more cars are behind them to maintain smooth traffic flow and ensure safety.
Step-by-step explanation:
Slow moving vehicles with five or more cars behind must pull off at the nearest turnout to let cars pass. This rule is designed to maintain a smooth flow of traffic and reduce the likelihood of accidents that can occur due to frustration or risky passing maneuvers. Pulling over is not only courteous but in some regions, it's required by law to prevent traffic buildup.
For example, on two-lane roads where passing is more dangerous, this rule helps faster vehicles to pass safely. It's important to always follow local traffic laws and regulations for the safety of all road users. If a slow-moving vehicle notices a queue forming behind it, it should look for an opportunity to safely move over at a designated area to allow others to pass.