In what situation does a driver frequently underestimate their own speed?

The selected combination of choices is correct because drivers often misjudge their speed in certain conditions. On wide, well-finished roads, the smoothness and openness can create a false sense of safety, leading to faster driving without realizing it. Similarly, after a long journey at high speed, drivers may become desensitized to their vehicle's speed, making it difficult to appropriately assess how fast they are actually going.

German traffic law emphasizes the importance of speed awareness and adjusting speed appropriately for road conditions to ensure safety. It's crucial for drivers to remain vigilant and regularly check their speed, particularly in these identified situations, to prevent accidents and maintain compliance with traffic regulations. The missed choice concerning narrow roads with uneven surfaces does not apply to underestimating speed; rather, it can lead to overestimating control, making it less relevant in this context.