If a driver is driving 10 mph under the legal traffic stream, how is their control rated?

When evaluating the control of a driver who is driving significantly under the speed limit, such as 10 mph below the legal traffic stream, their control can be rated as fair. This rating reflects that while the driver might be maintaining the vehicle at a cautious speed, driving slower than the flow of traffic can create increased tension on the road. It may lead to challenges in merging, turning, and maintaining a consistent pace with other vehicles, which could contribute to a lack of overall flow and coordination in traffic.

This fair rating indicates that the driver is somewhat in control but is not effectively adapting to the prevailing speed of the roadway, which can lead to potential hazards such as being tailgated or causing congestion. In contrast, a good rating would suggest optimal control with safe integration into traffic flow, and a bad or very bad rating would indicate significant issues with the driver's control or decision-making on the road.