What should drivers be cautious of regarding bridges and overpasses in winter weather?

In winter weather, drivers should be particularly cautious of bridges and overpasses because these structures tend to freeze before other sections of the road. This occurs due to their construction; bridges and overpasses are exposed to colder air both above and below, resulting in a quicker drop in temperature and a higher likelihood of ice formation. Unlike typical roadways that have some thermal mass from the ground, which can help retain heat, bridges can become treacherous more rapidly. It's important for drivers to be aware of this, as it can lead to unexpected icy conditions, increasing the risk of accidents. Understanding this characteristic of bridges and overpasses allows drivers to take appropriate precautions when temperatures dip and winter weather is present.