Fog lamps are extra lights on a vehicle, usually below the headlights, which are designed to make the road more visible in foggy conditions. They are rarely angled like the headlights; the lens being angled would make the fog lamps less effective.
Optimally, fog lights will have a yellow tint, because it is the legal-for-public-road-use color that fog reflects off of water vapor the least. Blue tint and white lights are less effective, but are sometimes used anyway for aesthetic reasons.
Some racing cars, most frequently rally cars, have extra fog lights, which are above the headlights. This is because of the frequency of high-speed altitude changes they encounter. Some of the extras are also sometimes pointed away from the center, so the driver can see better around sharp corners, which have to be driven around quickly to remain competitive.