What is the federal law limit for weight on a single axle?

The federal law limit for weight on a single axle is indeed 20,000 pounds. This regulation is established under the Federal-Aid Highway Act, which helps ensure safe travel on public roads by limiting the amount of weight that can be borne by a single axle. Exceeding this limit can lead to excessive wear and tear on roadways and increases the risk of accidents due to loss of control from overloaded vehicles. Understanding these limits is crucial for CDL drivers, as adhering to them helps maintain highway safety and longevity of infrastructure. Knowing the maximum weight capacities is vital for drivers to ensure compliance with regulations and safe operation of their vehicles when transporting loads.