As we look forward to cooler weather this fall, we should be reminded we are more likely to encounter fog on our highways. Fog is prevalent in areas where moisture is abundant, such our southern rivers and lakes. However, fog can occur anywhere. Abundant condensation nuclei enhances the formation of fog. Fog may form (1) by cooling air to its dew point, or (2) by adding moisture to air near the ground. Fog can also be be prevalent in industrial areas where byproducts of combustion provide a high concentration of these nuclei. Fog often develops along I-75 and other roads close to the Hiwassee River in Tennessee, near Bowater and Arch/Olin Chemical. Be careful.
Here are a few simple guidelines for driving in foggy conditions: