Yes, you can get a ticket for going under the speed limit. Nearly every state has an impeding-traffic law that makes it illegal to drive so slowly that you disrupt the normal flow of vehicles around you, and some highways go further by posting a minimum speed. Whether a slow speed is citable depends on the road, the traffic, and the conditions at that moment.
What Impeding Traffic Actually Means
The most common basis for a slow-driving citation is a statute prohibiting speeds that impede or block the normal and reasonable movement of traffic. There is no fixed number of miles per hour below the limit that automatically triggers a violation. The officer evaluates whether your speed makes sense given the vehicles around you, the road layout, and the weather.
That judgment call is what separates these tickets from ordinary speeding citations. A radar gun produces a concrete number; an impeding-traffic charge rests on what the officer observed. Driving 30 mph in a 50 mph zone on a clear afternoon with a line of cars stacking up behind you looks like impeding. The same 30 mph on a rain-soaked road with poor visibility looks like caution. Context changes the answer, and the same speed can be perfectly legal in the morning and a citable offense by afternoon.
Posted Minimum Speed Limits
Some highways remove the guesswork by posting a minimum speed. You have probably seen signs reading “MINIMUM SPEED 45” or a speed-limit sign with a minimum plaque mounted below it. Under federal guidance, transportation agencies may post a minimum where engineering judgment shows that slow-moving traffic on that stretch would impede the normal flow.1Federal Highway Administration. 2009 Edition Chapter 2B – Regulatory Signs, Barricades, and Gates – Section: 2B.16 Minimum Speed Limit Plaque
On a road with a posted minimum, driving below that number without a valid safety reason is a straightforward violation, much like exceeding the maximum. You do not need to be causing a visible backup. The posted minimum itself is the standard. These signs show up most often on interstates and limited-access expressways.
Left-Lane Laws Can Catch You at the Speed Limit
A related set of laws targets drivers who sit in the left lane of a multi-lane highway without actively passing anyone. Most states restrict use of the left lane by slower-moving traffic, and enforcement has been tightening.
Here is the part that surprises drivers: in a number of states, you can be ticketed for left-lane cruising even while driving at the posted speed limit. The law refers to the normal speed of traffic, not the legal speed. If the cars around you are moving at 70 in a 65, and you are holding the left lane at 65 forcing them to pass on the right, that can be a citable offense. Whether those other drivers are technically speeding does not change whether you are impeding them.
When Slow Driving Is Legally Protected
Every impeding-traffic statute carves out an exception for situations where reduced speed is necessary for safety or required by law. The common thread is that something outside your control justifies the slower pace. Situations that typically qualify:
- Bad weather that reduces visibility or traction, including heavy rain, snow, ice, and fog.
- Road hazards such as potholes, debris, flooded pavement, or an accident scene ahead.
- Construction zones, where reduced speed limits are legally required rather than optional.
- Mechanical trouble with your vehicle. Turn on your hazard lights and move to the right shoulder as soon as it is safe.
Heavy congestion also makes an impeding-traffic charge essentially impossible. You cannot impede a flow that does not exist. No officer is going to cite you for going 15 mph when the entire highway is crawling at 15 mph.
A Note on Farm Equipment and Other Slow-Moving Vehicles
Tractors, horse-drawn buggies, and road maintenance equipment are legally permitted on most public roads, but they must display the orange triangular slow-moving vehicle emblem on the rear. Operating this equipment on a public road without the emblem can itself be a violation. These vehicles are generally exempt from impeding-traffic laws because their slow speed is inherent to the vehicle rather than a choice by the driver, though many states require the operator to pull over when traffic builds up behind them and a safe pull-off exists.
What a Slow-Driving Ticket Actually Costs
An impeding-traffic citation is classified as a moving violation in most jurisdictions, which means it hits your driving record the same way a speeding ticket does. Base fines vary widely, but expect somewhere in the range of $50 to $250 for a first offense. That number is only the starting point.
Mandatory court costs, surcharges, and administrative fees often double or triple the sticker price. A citation with a $100 base fine can easily reach $250 to $400 once the add-ons are calculated, and these fees are imposed automatically on every conviction with no room to negotiate.
The longer-term cost is insurance. A moving violation on your record typically triggers a premium increase of roughly 20 to 25 percent, and that increase sticks for three to five years depending on your insurer and state. On an $1,800 annual policy, a 20 percent bump adds $360 a year. Over three years, a single slow-driving ticket can cost well over $1,000 in combined fines, fees, and higher premiums. Most states also assign demerit points, and accumulating too many can lead to license suspension.
How to Fight the Ticket
Because impeding-traffic charges rest on the officer’s judgment rather than a measured number, they are among the more contestable traffic violations. You generally have three options: pay the fine and accept the conviction, attend traffic school if your jurisdiction offers it to keep the violation off your record, or fight it in court.
If you fight, the strongest defense is almost always a safety justification. Rough pavement, fog, a steep grade, sharp curves, or an unfamiliar stretch of highway can all explain a slower speed. Photographs of the road, weather records from the day of the citation, and repair records for any mechanical issue can all support your case.
Challenging the officer’s account directly is harder. Officers generally win credibility contests in traffic court, so you need something concrete: a dashcam recording, a passenger willing to testify, or a physical detail about the road that contradicts the officer’s description. The practical reality is that many officers do not appear for traffic court hearings, and if yours does not show, the case is typically dismissed. That possibility alone makes a court date worth considering when you want to keep the points off your record.