At what temperature must asphalt cool to before traffic can drive on it?

At what temperature must asphalt cool to before traffic can drive on it?

• A. 140F
• B. 160F
• C. 180F
• D. 200F

Answer: (B)

Asphalt must cool to a temperature of around 160°F before it is safe for traffic to drive on it. At this temperature, the asphalt has sufficiently set and achieved a firm enough consistency to support the weight of vehicles without being damaged or deformed. Installing asphalt at a temperature that is too high can lead to deformation and ruts under the weight of traffic, while allowing it to cool too much before compaction can lead to an improper bond. Therefore, maintaining that threshold of around 160°F ensures both the integrity of the asphalt pavement and the longevity of the road surface.

Asphalt must cool to a temperature of around 160°F before it is safe for traffic to drive on it. At this temperature, the asphalt has sufficiently set and achieved a firm enough consistency to support the weight of vehicles without being damaged or deformed. Installing asphalt at a temperature that is too high can lead to deformation and ruts under the weight of traffic, while allowing it to cool too much before compaction can lead to an improper bond. Therefore, maintaining that threshold of around 160°F ensures both the integrity of the asphalt pavement and the longevity of the road surface.