Commercial Drivers Must Know State Laws


All commercial drivers are required to know the state laws limiting the size and weight of vehicles and loads.

They must stop at open weigh stations for weighing and inspection State Patrol troopers,

Commercial Vehicle Enforcement Officers (CVEO) and/or local law enforcement officers may stop drivers on the road to conduct inspections.

Violation for being oversized or overweight, operating defective equipment, or for improper licenses and permits can result in citations and fines. Drivers who ignore open weigh stations may be issued citations and fined.

You must know what oversized and overweight mean.

To do that you must know what the legal maximum’s are:

Length Width Height Weight Special Permits

Common State Law


Tire Chains

Tire Chains Between November 1 and April 1, any vehicle or combination of vehicles over 10,000 pounds are required to carry sufficient tire chains when traveling state highways crossing the mountains.

Speed Limits


Unless otherwise posted, the maximum allowable speed for trucks and buses is 60 mph on interstate or State highways (except autostages is 65), 50 mph on county roads and 25 mph on city and town streets.

Signs posted indicating lower limits must be obeyed

  • Right Lane RuleRight Lane RuleWhen driving a heavy vehicle or combination, travel in the right lane except when preparing to turn left or to pass another vehicle.Left Lane RuleNo vehicle or combination over ten thousand pounds may be driven in the left-hand lane of a limited access roadway having three or more lanes for traffic moving in one direction except when preparing for a left turn at an intersection, exit, or into a private road or driveway when a left turn is legally permitted.Slow Moving Vehicle

If you are driving a slow-moving vehicle on a two-lane highway and five or more vehicles are backed up behind you, unable to pass, pull off the roadway at the first safe, available turnout.

Turn-outs may be an extended shoulder where you can maintain your present speed, or a small area off the roadway where you can stop before returning to the roadway.

Do not attempt to pass more than one vehicle at a time when driving on a two-lane highway.

When traveling with another truck or bus in a “convoy,” leave enough space between vehicles in the convoy so other vehicles can pull back into the lane safely.

Hours of Service

All commercial drivers of private or common carriers and all commercial drivers driving interstate operation are required to comply with strict laws and regulations governing maximum driving and on-duty time

.After eight consecutive hours off-duty

Do not drive:

• More than 10 hours.

• For any period after having been on-duty 15 hours. (Drivers using sleeper berth equipment may satisfy the required eight consecutive hours off-duty by resting in a sleeper berth in two separate periods totaling eight hours.)

No driver can be on duty:

• More than 60 hours in any seven consecutive days.

• More than 70 hours in any eight consecutive days for carriers operating vehicles every day of the week.

It is your responsibility to record every 24-hour period of duty status in a driver’s logbook in duplicate. Retain a copy of each record of duty status for the previous seven consecutive days. This record is required to be in your possession and available for inspection while on duty. Logs are subject to inspection by law enforcement officials.

Questions on hours of service should be referred to the regulating agency at the federal or state level.

(The Administrative Code for private carriers covers the exceptions to these limitations).