Quick answer: Speeding in Maryland is governed by two different laws, and knowing both is the key to understanding your ticket. Md. Code, Transp. § 21-801.1 sets the absolute maximum limits — the numbers you see posted on signs. Section 21-801, the “basic rule,” separately makes it illegal to drive faster than is reasonable and prudent for the actual conditions, which means you can be convicted even when you were at or below the posted number. And there is no lawful buffer: 1 mph over is already a citable violation.
I’m David Waranch, and I’ve handled thousands of Maryland speeding cases. Below is what actually makes speeding illegal in this state, and the two myths that cost drivers the most in court.
Maryland Has Two Speeding Laws, Not One
Most drivers assume speeding means one thing: going faster than the number on the sign. That is only half the law. Maryland actually has two separate speeding statutes, and a police officer can charge you under either one.
The first, Md. Code, Transp. § 21-801.1, sets the maximum speed limits. Unless a different limit is posted, the ceilings are 30 mph on a business or residential street, 35 mph on a divided highway in a residential district, 50 mph on an undivided highway elsewhere, and 55 mph on a divided highway elsewhere. A limit above 55 exists only on interstates and expressways, and nothing in Maryland is set above 70. When a sign posts a lower number, that posted limit controls. Exceed it and you have violated the statute — full stop.
The second law is the one drivers never see coming. Section 21-801 is the “basic rule,” and it prohibits driving at a speed that is “more than that which is reasonable and prudent under the conditions.” It goes further and imposes a duty to slow down for curves, hill crests, intersections, narrow or winding roads, and any time weather or pedestrians create a hazard. Notice what is missing from that language: a number. The basic rule is about conditions, not the speedometer.
| The two speeding laws | § 21-801.1 — Maximum limits | § 21-801 — Basic rule |
|---|---|---|
| What it forbids | Exceeding the posted or default maximum | Any speed unreasonable for the conditions |
| Is there a number? | Yes — the sign, or a statutory default | No — it depends on weather, road, traffic |
| Can you break it at the posted limit? | No | Yes — the posted number is a ceiling, not a floor |
| Typical use | Radar, lidar, or pacing over the limit | Bad weather, fog, ice, school zones, crashes |
Myth #1: The Posted Limit Is a Safe Harbor
This is the most expensive misunderstanding in Maryland traffic law. Drivers believe that as long as they stay at or under the posted number, they cannot be ticketed for speed. That belief comes from thinking only about § 21-801.1. But the basic rule under § 21-801 does not care what the sign says.
Picture a road posted at 55 in heavy fog with ice on the surface. A driver doing 50 is under the limit — and can still be convicted, because 50 is not “reasonable and prudent” when you can barely see and the road is slick. The same logic applies to a 30 mph school zone crowded with children, or a sharp curve you take at the posted highway speed. The posted number is a ceiling you may never exceed; it is not a guarantee that any speed below it is legal.
“But I was under the limit.” That is not a defense by itself. Under § 21-801, the State does not have to prove you exceeded the posted number — only that your speed was unreasonable for the conditions at that moment. The sign is the maximum you are allowed on a perfect day; it is not a safe harbor when conditions turn dangerous.
Myth #2: There Is a “10 Over” Buffer
“Everyone does 10 over” and “I was just going with the flow of traffic” are the two phrases I hear most, and neither is a defense in Maryland. There is no statutory grace zone. The moment you cross the limit — 1 mph, 5 mph, 9 mph — you have committed a violation the officer is entitled to cite. Some officers exercise discretion and let small amounts slide, but that is a courtesy, not a legal right, and you cannot rely on it or argue it to a judge.
The numbers confirm there is no free cushion. Exceeding the limit by just 1 to 9 mph carries an $80 preset fine and 1 point. The consequences climb quickly from there, and speed matters enormously once you are 30 or more over: that bracket jumps to 6 points on a single ticket — past the 5-point threshold that triggers Maryland’s driver improvement program and closing in on the 8-point suspension line. Thirty-plus over can also be charged as negligent driving, which requires a court appearance. For the full fine-and-point brackets, see our penalties by speed range and how many points a speeding ticket carries.
One warning about those preset amounts: paying the fine is not “just paying a fine.” It is a guilty plea, and it becomes a conviction on your driving record with the points attached. Requesting a waiver hearing or a trial keeps a better outcome open — including probation before judgment under Crim. Proc. § 6-220, which can keep the conviction and points off your record entirely. That option disappears the moment you prepay. The “flow of traffic” argument, by contrast, almost never works; we explain why on our flow-of-traffic defense page.
How the State Proves Your Speed
Once you understand that speeding is really two offenses, the defense becomes about the evidence. For a § 21-801.1 charge, the State usually relies on radar, lidar, or pacing to establish your speed, and each method has requirements the officer must satisfy — calibration records, training, tracking history, and a clear reading. When those foundations are missing, the reading can be challenged. See how these tools work and where they break down in our guides on radar speeding tickets and pacing tickets. If you are fighting a ticket, a Maryland speeding ticket lawyer can tell you quickly whether the State’s proof holds up.
Yes. Under the basic rule in Transportation section 21-801, it is illegal to drive faster than is reasonable and prudent for the conditions, even at or below the posted limit. The posted number is a maximum ceiling, not a guarantee that any speed under it is safe or legal.
No. Maryland has no statutory grace zone. Going even 1 mph over the limit is a citable violation. Some officers use discretion for small amounts, but that is a courtesy, not a legal right, and it cannot be argued as a defense.
Section 21-801.1 sets the absolute maximum speed limits, such as 30 mph in business and residential areas and 55 mph on divided highways, with posted signs controlling. Section 21-801, the basic rule, separately bans any speed that is unreasonable for the actual conditions. An officer can charge you under either one.
Law Offices of David R. Waranch — 301-563-9575 · toll-free 1-877-566-2408. Hablamos Español.
Last updated: August 2026. Statutory references: Md. Code, Transp. § 21-801 (basic rule), § 21-801.1 (maximum limits), § 21-901.1 (negligent driving); Md. Code, Crim. Proc. § 6-220 (probation before judgment). This page is general information about Maryland law.