What does an expired rejection (red) sticker indicate about a vehicle?

An expired rejection (red) sticker signifies that the vehicle has failed inspection. This type of sticker is typically used to indicate that, during a recent inspection, the vehicle did not meet the required standards for safety or emissions, and thus, it cannot legally operate on the road until the necessary repairs are made and it passes a subsequent inspection. This sticker alerts both law enforcement and parking enforcement officers that the vehicle is not compliant with local regulations and requires attention before it can be driven again.

The other options do not correctly describe the purpose of an expired rejection sticker. For instance, an immediate towing alert would not stem merely from the presence of an expired rejection sticker, as such a decision usually requires additional context around parking violations or safety concerns.