A diamond-shaped sign with the words "Range Cattle" signifies what?

The diamond-shaped sign with the words "Range Cattle" indicates that you should be alert for cattle that may be roaming free in the area. This type of sign is used to warn drivers that they could encounter loose cattle on the roadway, particularly in areas where cattle freely graze or where ranching is common. The sign serves as a precaution to encourage drivers to slow down and be vigilant, as cattle can unexpectedly cross roads, posing a danger to both the animals and motorists.

In contrast, the other options present scenarios that do not match the meaning of the sign. For example, a prohibition on cattle would require a different, more explicit sign, while a restriction of cattle crossings to certain hours implies regulation that is not indicated by the term "Range Cattle." Similarly, referencing a ranch exit would not relate to the presence of cattle on the road but to an upcoming road feature, which is a different type of signage. Therefore, option A effectively captures the purpose of the "Range Cattle" sign by communicating the potential for loose cattle in the vicinity.