Truck Weigh Stations & Ag Inspection by State
Who must stop at an open scale, how PrePass and Drivewyze bypass works, where the agricultural and border stations sit, and the fine for passing an open station. Covers all 50 states and DC. Reference only, not legal advice.
10All CMVs stop
3Ag / border stations
2Bypass programs
51Jurisdictions
01
The rule
When you have to pull in
The baseline in most states is simple: if the station is open and the sign or signal tells trucks to enter, you cross the scale. Some states only require it over a weight threshold, and a few only when a sign directs your class. A PrePass transponder or the Drivewyze app can earn you a green light and a mainline bypass, but a red light means pull in every time. Read the lit signs, not just the statute.
02
By state
Weigh-station rules for all 50 states and DC
Tap a state for who must stop, bypass availability, agricultural stations, and the fine for passing an open scale.
| State | Who must stop | Bypass | Ag station |
|---|---|---|---|
| Alabama AL | Only when a sign directs | PrePass and Drivewyze both operate in Alabama | — |
| Alaska AK | Over a weight threshold | Effectively none | — |
| Arizona AZ | All CMVs must stop | Drivewyze PreClear is active at Yuma (I-8), Ehrenberg and San Simon (I-10) | — |
| Arkansas AR | Over a weight threshold | PrePass and Drivewyze both operate in Arkansas | — |
| California CA | All CMVs must stop | PrePass and Drivewyze are both widely available across CHP scales | Ag / border |
| Colorado CO | Over a weight threshold | Drivewyze covers Colorado (busiest site is Monument on I-25) and PrePass operates statewide | — |
| Connecticut CT | Over a weight threshold | Both available. PrePass has approved sites and Drivewyze PreClear covers the fixed scales | — |
| Delaware DE | Only when a sign directs | Bypass coverage is limited in Delaware | — |
| District of Columbia DC | Only when a sign directs | Not offered. The District runs no fixed weigh stations | — |
| Florida FL | All CMVs must stop | PrePass and Drivewyze both bypass Florida's FDOT/FHP weigh stations | Ag / border |
| Georgia GA | Over a weight threshold | Available and growing | — |
| Hawaii HI | Over a weight threshold | Not offered. Hawaii has no PrePass or Drivewyze weigh-station coverage and no fixed open/closed… | Ag / border |
| Idaho ID | Over a weight threshold | PrePass and Drivewyze both operate in Idaho | — |
| Illinois IL | Only when a sign directs | Both PrePass and Drivewyze operate here | — |
| Indiana IN | All CMVs must stop | Both widely available across the 10 fixed stations | — |
| Iowa IA | Only when a sign directs | Both operate in Iowa | — |
| Kansas KS | All CMVs must stop | Both PrePass and Drivewyze operate in Kansas | — |
| Kentucky KY | All CMVs must stop | Widely available | — |
| Louisiana LA | All CMVs must stop | PrePass and Drivewyze both operate at DOTD stationary scales on I-10, I-12, I-20, I-49 and I-55 | — |
| Maine ME | Over a weight threshold | Drivewyze PreClear only | — |
| Maryland MD | Over a weight threshold | PrePass and Drivewyze both operate in Maryland | — |
| Massachusetts MA | Only when a sign directs | Both run here. PrePass has approved sites and Drivewyze PreClear covers scales such as… | — |
| Michigan MI | Only when a sign directs | Both available. PrePass covers Grass Lake EB/WB on I-94 and Pontiac SB on I-75 | — |
| Minnesota MN | Only when a sign directs | Both work in Minnesota | — |
| Mississippi MS | All CMVs must stop | PrePass and Drivewyze both operate in Mississippi | — |
| Missouri MO | Over a weight threshold | Both PrePass and Drivewyze operate statewide | — |
| Montana MT | Over a weight threshold | PrePass and Drivewyze both cover Montana fixed weigh stations and mobile sites | — |
| Nebraska NE | Only when a sign directs | Both PrePass and Drivewyze cover Nebraska, heavily along the I-80 spine | — |
| Nevada NV | Only when a sign directs | PrePass and Drivewyze both operate at Nevada's I-15 and I-80 scales | — |
| New Hampshire NH | Only when a sign directs | Drivewyze PreClear only | — |
| New Jersey NJ | Over a weight threshold | Both work here. PrePass and Drivewyze PreClear cover the same fixed scales | — |
| New Mexico NM | All CMVs must stop | Drivewyze covers the New Mexico I-25 corridor and other sites; PrePass coverage is thinner here | — |
| New York NY | Over a weight threshold | Both run here. Drivewyze PreClear covers New York weigh sites and PrePass has approved… | — |
| North Carolina NC | Over a weight threshold | PrePass (windshield transponder) and Drivewyze (app/ELD) both operate in North Carolina | — |
| North Dakota ND | Over a weight threshold | Both PrePass and Drivewyze operate in North Dakota | — |
| Ohio OH | Over a weight threshold | Both PrePass and Drivewyze operate widely across Ohio's fixed scales and mobile enforcement on… | — |
| Oklahoma OK | All CMVs must stop | Both PrePass and Drivewyze operate in Oklahoma at ports of entry and fixed scales on I-35 | — |
| Oregon OR | Only when a sign directs | Three options. Oregon's own Green Light preclearance is free and transponder-based at state… | — |
| Pennsylvania PA | Only when a sign directs | Both PrePass and Drivewyze are widely available | — |
| Rhode Island RI | Only when a sign directs | Limited. Rhode Island has few active fixed scales, so bypass matters less here | — |
| South Carolina SC | Only when a sign directs | Available and growing | — |
| South Dakota SD | Over a weight threshold | Drivewyze PreClear covers South Dakota's open ports of entry and inspection sites | — |
| Tennessee TN | Over a weight threshold | Widely available | — |
| Texas TX | Only when a sign directs | PrePass and Drivewyze both run widely across Texas at inspection sites and ports of entry on… | — |
| Utah UT | Over a weight threshold | PrePass and Drivewyze both operate in Utah (Drivewyze at Echo on I-80) | — |
| Vermont VT | Only when a sign directs | Drivewyze PreClear only | — |
| Virginia VA | Over a weight threshold | PrePass and Drivewyze both operate in Virginia | — |
| Washington WA | Only when a sign directs | Drivewyze lists its Washington sites as notifications only | — |
| West Virginia WV | Only when a sign directs | PrePass and Drivewyze both cover West Virginia's fixed scales on I-64, I-77, and I-79 | — |
| Wisconsin WI | Over a weight threshold | Both available. Drivewyze's busiest Wisconsin site is Hudson EB on I-94 | — |
| Wyoming WY | Only when a sign directs | PrePass and Drivewyze both operate in Wyoming | — |
Sources: state DOT/DPS commercial-enforcement pages; FMCSA; CVSA; PrePass and Drivewyze coverage. Last reviewed July 2026. Station hours and locations change; confirm before you rely on a figure.
Weigh Station FAQ
Do trucks have to stop at every weigh station?
In most states, yes: when a scale or inspection station is open and the sign or lights tell trucks to enter, every commercial vehicle must pull in and cross the scale. A few states only require it above a weight threshold or only when a sign specifically directs your class of truck. When the station is closed or the "closed" sign is lit, you keep rolling.
What are PrePass and Drivewyze, and how does bypass work?
They are electronic bypass programs. A PrePass transponder or the Drivewyze app talks to the station a mile or two out; if your carrier is in good standing, you get a green light or a "bypass" message and stay on the mainline at highway speed. A red light means pull in. Bypass is a privilege the state can pull, and you still must stop when told.
What happens if I pass an open weigh station?
Blowing past an open scale is its own violation, separate from any weight problem. Depending on the state it is a fine from about $100 into the several hundreds, and officers can turn around, stop you, and escort you back. Repeat or willful bypass can be a misdemeanor and a CSA hit for your carrier. If you miss one by accident, expect to be brought back.
Do I have to stop at agricultural inspection stations?
Yes, where they exist. California runs Border Protection Stations on the main highways into the state, and Arizona and Florida run agricultural or produce inspections. Every vehicle, including trucks, must slow and stop when directed so inspectors can check for pests, produce, and livestock. These are separate from weight scales and can appear at state lines far from any port of entry.
03
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