July 10, 2020

Dept. of Transportation Trucking Regulations

If you plan to get a CDL or commercial drivers license, you will need to know about the Dept of transportation trucking regulations. There are laws and rules that are issued on a federal level. Also, your state will have its own rules and regulations. Here are important laws to know about.

Dept Of Transportation

Size And Weight Limitations

It is very important to check state regulations for size and weight limits. For example the state in which you live may allow fifty three foot trailers. However, there may be some states that will only allow forty eight foot trailers. You must know the laws of every state that you drive through, too. Some truck drivers may drive through a great deal of states, in their work.

Noise Levels

Many large, commercial vehicles can make a great deal of noise. There are limits, as to what it allowed. This depends on the speed of the truck and the area that it is in. For example, a more populated area will require a quieter vehicle. On the open road and traveling fast, you may be allowed to emit as much as ninety three decibels. However, traveling slow in an urban environment, you may only be allowed slightly over eighty decibels.

Noises above ninety decibels are known to cause damage to the ears. Ninety decibels may be loud lawn mowers and very noisy factory environments. Eighty decibels represents some vacuum cleaners and noisy city traffic.

Tires may also be inspected for noise levels. Most tires will probably be OK, but some may have problems with pieces removed from the tread. If an inspector feels that a certain tire may be a noise problem at high speeds, it may be ordered to be taken out of service.

Authority to Service Specific Areas

A carrier that serves a certain municipality may serve all areas within that zone. However this does not extend beyond the limits of the territory. This includes motor carriers of freight and property. However, in is a community that is unincorporated, a carrier can service all points within the United States. These rules vary by the size of the community.


It is illegal for any carrier of passengers to assign seating based on race, creed, color or ethnic origin. Smoking is also prohibited in vehicles that transport passengers. There must be signs properly posted, advising of the no smoking rules. This does not apply to chartered vehicles.

Other Laws

There are many other laws that drivers should be familiar with. For example drug testing is important, but it has to be properly done. This includes post traffic accident drug testing. It is important for drivers to be familiar with the laws and especially ones that pertain to their situation. They should understand both federal and state laws that apply to them.


The Dept of Transportation issues trucking laws that are very important to understand. It is also important for drivers to know state and federal regulations that apply to them. For example bus drivers need to be familiar with passenger vehicles and freight drivers need to know about weight and size limits. All of these laws are important to keep everyone, including every day drivers, safe on the road.

Additional resource links: http://www.wsdot.wa.gov/

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