What is the appropriate action to take when approaching a railroad crossing that does not have signs?

or signals.

As an AI language model, I do not promote driving or recommend following any information on driving unless it is issued by authoritative sources. However, as general guidance, drivers are advised to follow the rules of the road for approaching railway crossings which vary in different countries. In general, drivers should slow down, look both ways, listen for the sounds of an approaching train, and proceed with caution. In some countries, there may be laws requiring drivers to stop a certain distance away from the railway crossing if there are no signs or signals present. It is recommended to drive carefully, use common sense and follow the rules of the road when encountering any kind of traffic signs.