Legal Weight Limits

Arkansas observes the typical interstate limits: 20,000 lbs per single axle, 34,000 lbs per tandem, and 80,000 lbs gross (5 axles). State highways in Arkansas generally also use these limits unless a specific route is posted lower. There isn’t a routine general tolerance on weight; however, the law provides some flexibility for first offenses and small overages (addressed via fines rather than immediate out-of-service). Trucks exceeding legal weights need Arkansas Department of Transportation (ARDOT) overweight permits. Arkansas also has certain commodity exemptions (e.g. higher tandem and gross limits for five-axle trucks hauling unfinished farm, forest or soil products on non-interstate routes), but those aside, any weight above the statutory limit is a violation. The Bridge Formula is enforced in Arkansas to protect its many river crossings.

Fine Structure

Arkansas treats overweight penalties as misdemeanors with fines calculated per pound over, with escalating rates for repeat offenses. The fine schedule is detailed in Arkansas Code §27-35-202:

  • For 0–1,000 lbs over: $10–$20 (min to max). Essentially, a negligible overage could be as low as ten dollars.
  • 1,001–2,000 lbs over: $0.01–$0.03 per lb (min to max). So at 2,000 lbs over, max fine ~$60.
  • 2,001–3,000 lbs: $0.02–$0.04 per lb.
  • 3,001–4,000 lbs: $0.03–$0.05 per lb.
  • 4,001–10,000 lbs: $0.04–$0.06 per lb.

For excess above 10,000 lbs, Arkansas imposes sharply higher rates depending on offense count within a year: a first offense over 10k is $0.08–$0.10 per lb; a second offense in a year is $0.13–$0.15 per lb; and a third or subsequent in a year is $0.18–$0.20 per lb. These are very heavy fines. For example, 12,000 lbs over on a third offense could cost around $2,160 (12k × $0.18). Additionally, if an officer finds a truck willfully evaded a weigh station, Arkansas law doubles the fine that would otherwise apply. There are also nominal base fines for the offense itself (up to $100 for first conviction, $200 second, $500 third), but those are overshadowed by the per-pound penalties. Importantly, Arkansas makes it mandatory for the court to assess these penalties, so they cannot be waived. Overall, Arkansas’ fine structure encourages compliance: small overweight might be <$100, but significant overloads, especially if repeated, lead to fines in the thousands and potential criminal charges.

Enforcement Methods

Arkansas employs a mix of permanent weigh stations and surprise checks. ARDOT operates weigh station facilities on major interstates (for example, on I-40 near West Memphis and I-30 near Hope and Malvern). These stations often have PrePass/WIM to screen trucks. Additionally, Arkansas Highway Police (a division of ARDOT) patrol state highways and set up portable scales to catch overweight trucks circumventing fixed stations. Enforcement has been known to target bypass routes around scales. Arkansas’ law enforcement can also pursue trucks that don’t stop at open weigh stations, and doing so and getting caught yields doubled fines, as noted. There is a strong presence at the Mississippi River crossings (to catch overweight vehicles entering from bridge crossings). The state has an Agriculture and Forestry industry, so officers give special attention during harvest season when grain trucks might overload back roads – they use mobile enforcement then. If a truck is found overweight, Arkansas allows officers to require the vehicle to park until it is brought into legal weight (cargo off-loaded or a permit obtained). Some Arkansas scales are open 24/7, others selectively. The state also participates in regional Weight Enforcement campaigns (coordinated checks on US highways). In summary, Arkansas leverages strict per-pound fines and active Highway Police enforcement (both fixed and mobile) to ensure trucks stay within limits, protecting roads like I-30, I-40 and critical infrastructure.