As a professional truck driver, you will encounter weigh stations. The Department of Transportation (DOT), Department of Motor Vehicles (DMV), and other transportation officers monitor these stops to ensure that truck weight is not causing damage to America’s roadways or other infrastructure, such as bridges. While this may feel like an inconvenience, weigh stations serve an invaluable purpose in keeping everyone on the road safe—including you.
Understanding weigh station rules and procedures can help you prepare for what to expect and prevent a minor inconvenience from turning into a major issue.
Commercial vehicles are required to stop at weigh stations (truck scales) along highways and interstates. In most cases, trucks cannot exceed 80,000 lbs when fully loaded. Some loads may be exempt for a specific trip, typically when they cannot be divided into smaller loads.
Weigh stations exist for safety. Heavy trucks are more difficult to control and can cause greater damage to roads and infrastructure. These stations ensure that vehicles are operating safely and within regulations.
What Trucks Are Required to Stop?
Requirements vary by state, but there are clear patterns across the country.
Most Common Rule
Most states require commercial vehicles over 10,000 lbs GVWR to stop at weigh stations.
This includes:
Alaska, Arkansas, Florida, Georgia, Hawaii, Indiana, Iowa, Kentucky, Louisiana, Massachusetts, Minnesota, Nevada, New Jersey, North Dakota, Ohio, Rhode Island, Washington, Wisconsin
All Commercial Vehicles Must Stop (Regardless of Weight)
California, Connecticut, Texas
Higher or Different Weight Thresholds
- Missouri: Over 18,000 lbs
- Montana: Over 8,000 lbs
- Virginia: Over 7,500 lbs
- Nebraska: Over one ton (excluding pickups towing recreational trailers)
- Colorado: Over 26,000 lbs (requires clearance before operating)
- New Mexico: Over 26,001 lbs
- Oregon: Over 26,000 lbs
Officer Discretion / Case-by-Case Enforcement
In these states, officers may require vehicles to stop and be weighed if they suspect a violation:
Alabama, Delaware, Illinois, Kansas, Maine, Mississippi, New Hampshire, New York, North Carolina, Oklahoma, South Carolina, Utah, Vermont, West Virginia, Wyoming
Additional notes:
- Alabama: Can require weighing within a 5-mile distance
- Maine: Must comply when directed by an officer or station
- South Carolina: Vehicles may be required to unload if overweight
- Utah: May require inspection within 3 miles
- Vermont: May detain vehicle for up to one hour
Special or Unique Requirements
- Arizona: Includes hazmat, passenger transport, agricultural inspections
- Michigan: Focuses on dual rear wheels and certain vehicle types
- Pennsylvania: Broad authority to inspect many vehicle types regardless of size
- Maryland: Includes buses (16+ passengers) and hazmat vehicles
- South Dakota: Over 8,000 lbs and specific operations
- Tennessee: General enforcement of size, weight, and safety regulations
- Idaho: Uses ports of entry and roving units rather than a fixed rule
💡 Important: Always check the specific laws for the states you are traveling through. While these groupings cover general rules, enforcement can vary.
If you are unsure, it is always safest to enter the weigh station to avoid fines or violations.
Tips When Entering a Weigh Station
The Approach
As you drive along the interstate, you will see signs indicating a weigh station ahead. Within a half- to quarter-mile, additional signs will show whether it is open or closed.
If open:
- Move into the right lane
- Prepare to stop
Some locations offer PrePass or weigh-in-motion systems that allow certain trucks to bypass.
Stay off your phone—even hands-free devices—and focus fully on the station.
If you miss the entrance:
- Do NOT back up
- Continue driving—it is unsafe and illegal to reverse
The Scale
Follow posted speed limits and instructions as you approach the scale.
You may:
- Be allowed to continue through
- Be required to stop and weigh each axle
If you are unsure what to do, pull into a designated parking area and ask for assistance.
The Inspection
After weighing, inspectors may check:
- Logs
- Safety rating
- Equipment
- Hours of service
- Electronic Logging Device (ELD)
If everything is in order, you will be on your way quickly. If not, delays may occur.
A proper pre-trip inspection is key to a smooth experience.
Additional Safety Information
Our highways are dangerous, and everyone must do their part to keep them safe.
All 50 states have “Move Over” laws to protect law enforcement officers and first responders. Despite this, traffic-related incidents remain the leading cause of on-duty deaths for law enforcement.
The National Highway Traffic Safety Administration (NHTSA), along with its partners, is working to increase awareness of these laws. By spreading awareness, we can help protect those who protect us.
Learn more:
http://safety.nsc.org/ddam
https://www.enddd.org/
