According to AASHTO, what is the primary purpose of load rating a bridge?

According to AASHTO, the primary purpose of load rating a bridge is to determine the safe load-carrying capacity of the bridge. Load rating involves calculating the maximum live load that a bridge can safely carry, considering the bridge's material properties, geometry, condition, and the applicable design codes. This evaluation ensures that the bridge can safely support the expected traffic loads without exceeding allowable stress limits or compromising its structural integrity. The results of the load rating are used to make informed decisions regarding load postings, permit vehicles, and the need for rehabilitation or replacement, ultimately protecting public safety and managing the bridge infrastructure effectively.