What is the purpose of employing flags or lights at level crossings?

The purpose of employing flags or lights at level crossings is primarily to warn vehicles and pedestrians of an approaching train. These safety devices serve as critical notifications that help prevent accidents by alerting individuals that a train is approaching the crossing, thereby prompting them to stop and wait until it is safe to proceed. The use of visual signals, such as flags or lights, is essential in ensuring the safety of both the railway operations and the public, effectively reducing the risk of collisions between trains and road users. This proactive measure is part of a broader safety protocol that emphasizes the importance of visibility and warning in environments where railroads intersect with roadways.