During a trip, what should you primarily watch to detect signs of trouble?

The primary focus during a trip should be on the gauges in your vehicle. Gauges provide vital information about the operational status of the vehicle, such as engine temperature, oil pressure, fuel levels, and battery voltage. Monitoring these readings can help you detect potential mechanical problems before they escalate into serious issues.

For example, if the temperature gauge rises significantly, it may indicate an overheating engine that requires immediate attention. Similarly, a drop in oil pressure can signify impending engine failure. By regularly checking the gauges, you can ensure that your vehicle is functioning correctly and can take proactive measures if something appears to be out of the ordinary.

While other factors like road signs, other drivers, and stop lights are important for safe driving and navigation, they do not provide direct insight into the vehicle's condition. Prioritizing the monitoring of gauges can prevent breakdowns and accidents, making it a critical practice for all drivers, especially those operating commercial vehicles with a CDL.