Severe weather conditions such as heavy rain, snow, ice, and high winds can create hazardous driving conditions for fleet vehicles, especially in winter-sensitive corridors like Donner Pass on I-80 and I-70 through the Colorado Rockies. These conditions can lead to reduced visibility, slippery roads, and increased crash risks. Federal Highway Administration data shows that rain and mist account for over 77% of weather-related crashes, while heavy snow can reduce freeway speeds by up to 40%. Fleet managers must prepare for potential delays and safety risks to ensure the well-being of drivers and the efficiency of operations.