Rain changes more than the road surface. Spray can hide lane markings, standing water can obscure the pavement, and mirrors can become harder to read. A driver who prepares only by switching on the wipers has missed much of the task. Build the plan before conditions become demanding.
Check the equipment that supports visibility
Include wipers, washers, glass, mirrors, lights, and tires in the appropriate inspection. Report a defect rather than waiting to discover its effect in traffic. Learn how to use the defogging controls while parked so you are not searching for them on the road.
Give yourself more time
Reduce speed for actual conditions and increase space ahead. Avoid abrupt control inputs. Continue watching for traffic slowing beyond the vehicle directly in front of you. A posted limit does not mean that speed is safe when visibility or traction deteriorates.
Know when to stop the trip
Do not drive into floodwater or water of uncertain depth. If you cannot maintain safe visibility or control, find a safe stopping location and communicate the delay. Stopping on a travel lane or in an exposed location can create a second hazard, so plan options early.
Put it into practice
While parked, locate each visibility control without taking your eyes away for long. Discuss with your instructor which weather conditions would require delaying a training drive.
Explore Patriot CDL training programs and the CDL article archive for related learning resources.
Official references
Follow current official guidance and your instructor’s directions for your vehicle and training setting. Archive entry for 2026-09-16; added October 6, 2026.