Among all weather conditions, fog is probably the most dangerous, so if you are driving in foggy weather, lower your speed and turn on your low-beam headlights. If the fog becomes so thick that you can barely see, pull safely and completely off the road. You should also slow down at the first sign of rain, drizzle, or snow on the road. This is when many road surfaces are most slippery because moisture mixes with oil and dust that has not been washed away. The slippery roads can reduce traction and you're at risk to lose control of your vehicle. But not only cold weather and precipitation can change your driving pattern. You also should be aware of high temperatures, sun glare, and high winds.