Which traffic sign reminds drivers that there is a one-way railway at the intersection ahead?

The signs in the following figure all indicate that there is a single-track railway at the intersection ahead, with a guarded railway crossing above and an unguarded railway crossing below.

Railway intersections with the following signs indicate that multiple railways intersect with roads.

Extended data:

Railway crossing refers to the intersection of road and railway plane, which is divided into guarded crossing and unguarded crossing. Crossing signals, warning signs or safety protection facilities shall be set at the crossing of railways and highways. An unguarded railway crossing,

Warning signs should be set at a certain distance from the crossing. When crossing the crossing, you should obey the command of the crossing staff, and you are not allowed to cross forcibly when the railing of the railing machine is put down. When crossing an unmanned crossing, pay attention to the crossing signal lights and check whether there are trains on both sides of the crossing. Only when it is safe can we pass.

References:

Railway crossing-Baidu encyclopedia