What does a sign showing "Side winds" caution drivers about?

The sign indicating "Side winds" cautions drivers about the potential danger posed by strong crosswinds. Side winds can affect vehicle stability, particularly for larger vehicles like trucks, buses, or vans, which have a larger surface area for the wind to act upon. This warning alerts drivers to be aware of sudden gusts that can make it challenging to maintain control of their vehicles, especially when driving on open roads or bridges where the wind may be stronger. Understanding this caution is crucial for ensuring safety, as failing to acknowledge such conditions can lead to accidents or loss of control while driving.