What does a number sign located under a crossbuck indicate?

A number sign located under a crossbuck indicates the number of train tracks at the crossing. This information is crucial for drivers because it helps them understand the potential for multiple trains crossing their path at any given time. Knowing the number of tracks can influence a driver’s decision on when it is safe to proceed after a train has passed, as additional trains may follow on the other tracks.

The other options do not pertain to the information conveyed by the number sign. For instance, while traffic lanes, speed limits, and distances to crossroads are important for various aspects of road safety, they are not indicated by the number sign beneath a crossbuck, which specifically serves to inform about train traffic at railway crossings. Understanding the specific function of road signs, like the number of tracks, enhances safety and awareness for drivers navigating near train crossings.