Final answer:
A driver should be observant of road conditions, calculate braking distances, and consider the time and total distance required to stop safely.
Step-by-step explanation:
When searching, a driver should look ahead to assess traffic conditions, check their mirrors for surrounding vehicles, and scan for any potential hazards on the road. This includes being aware of the distance the driver covers before hitting the brakes, understanding how long it takes the truck to stop after hitting the brakes, and calculating what total distance the truck covers to stop. It is important for drivers to have a clear understanding of these distances to maintain safety on the road and react appropriately in emergency situations.