What are crossings that have yellow circular advance warning signs, pavement markings, and crossbucks known as?

Crossings that feature yellow circular advance warning signs, pavement markings, and crossbucks are known as passive crossings. These crossings provide visual indicators and warnings to drivers about the potential hazards associated with the crossing, but they do not have active warning devices such as lights or barriers that operate to alert traffic.

The yellow circular signs serve to indicate the presence of a railroad crossing ahead, while the crossbucks further indicate where the crossing is located. The combination of these elements informs drivers to be cautious and prepared to stop if necessary, but it relies on the driver's awareness and the ability to interpret the signs.

Understanding the distinction between passive crossings and other types is important. For example, active crossings would include features such as flashing lights or gates that provide an active warning when a train is approaching. Therefore, passive crossings represent locations where drivers must remain vigilant and use their judgment based on the available signs and markings.