What is the difference between a controlled and uncontrolled railroad crossing?

A controlled railroad crossing features signals, gates, or other warning devices that alert drivers and pedestrians to the approach of a train, enhancing safety at the intersection. In contrast, an uncontrolled railroad crossing lacks these safety measures, relying instead on signage to indicate the presence of the tracks, which can pose a higher risk for accidents. Drivers and pedestrians at uncontrolled crossings must be more vigilant and aware of their surroundings when crossing the tracks.