Why should commercial vehicles primarily travel in the right lane?

Answer: C — They cannot keep up with the traffic flow

Choosing to have commercial vehicles primarily travel in the right lane is important for several reasons related to traffic safety and efficiency. The correct answer highlights that commercial vehicles generally cannot keep up with the flow of faster-moving vehicles, often because of their size, weight, and the different performance characteristics compared to passenger vehicles. Commercial vehicles, such as trucks and buses, usually have lower acceleration rates and require more distance to reach the same speeds as lighter, passenger vehicles. As a result, when they operate in the left lane, which is typically reserved for faster-moving traffic, it can create hazards, including traffic congestion or potential accidents. Staying in the right lane allows these vehicles to operate at their safe and efficient speeds while minimizing disruption to the overall flow of traffic. It enhances road safety by allowing faster vehicles to pass on the left without complicated maneuvers or sudden stops. This strategy not only helps maintain a steady traffic flow but also supports better road safety for everyone, especially since commercial vehicles have larger blind spots and longer stopping distances. This practice aligns with the principles of defensive driving and good traffic management, making the roads safer for all users.