Which of the following is NOT a type of temporary traffic barrier?

The choice of asphalt as the correct answer is based on the definition and classification of temporary traffic barriers. Temporary traffic barriers are designed to provide a physical separation between traffic and construction zones or hazards, ensuring the safety of both drivers and workers.

Water-filled barriers, mobile barriers, and steel barriers are recognized types of these temporary installations. Water-filled barriers are often used for their ability to absorb impact and can be easily transported and deployed. Mobile barriers are designed for situations where traffic flow may change frequently, allowing for quick adjustments. Steel barriers are robust and provide high durability and impact resistance.

Asphalt, however, is a pavement material used primarily for road surfaces, and while it may be involved in various traffic control applications, it does not fit the category of a temporary traffic barrier. It is not utilized in the same way to redirect or block traffic in the manner that the other options are designed to do. Therefore, identifying asphalt as something that does not belong in the list of temporary traffic barriers is correct.