- Rain
- Ice
- Sleet
- Snow
- Fog
Truck Drivers Are Required to Use Extreme Caution in Bad Weather Every commercial truck driver should be fully aware of the Illinois traffic laws and federal regulations with which they must comply to drive safely. However, in some cases, truck drivers are expected to use their judgment and make decisions about safe driving in order to prevent crashes and serious injuries. One such instance is when adverse weather conditions are present. While a speed limit may officially be 60 miles per hour for trucks on a highway, there may be times when it is unsafe for a truck driver to travel at that speed. The following weather conditions can create higher risks at faster speeds: