What should be your concern when driving faster than the flow of traffic?

When driving faster than the flow of traffic, the primary concern is the increased risk of collision. Speeding creates a situation where the driver has less time to react to sudden changes in traffic conditions, such as abrupt stops by slower vehicles, merging traffic, or obstacles on the road. This heightened speed diminishes the driver's ability to safely respond to potential hazards, leading to a higher likelihood of accidents.

Moreover, driving at a faster pace than surrounding vehicles can create a dangerous disparity in speed, making it difficult for other drivers to predict your actions. This unpredictability can contribute to erratic movements, resulting in potential collisions as other drivers may not anticipate your speed. Additionally, the higher the speed, the greater the stopping distance required, which can further exacerbate the risk of crashes if a quick stop is necessary.

The other options do not align with the serious safety concerns associated with speeding. Increased fuel efficiency and better vehicle performance are not inherently benefits of speeding and can often be counterproductive, while driving faster may actually increase fatigue rather than lessen it due to heightened stress and concentration required to manage driving at high speeds.