Watch Out for Speeding Penalties at Bristol

Speeding penalties at Bristol are but one of the hazards drivers must face when racing this intense, high-banked short track. Tight racing, uncertain tire wear, small pit boxes, and rising tempers contribute to a stressful night for drivers and crew chiefs.

I’ve always thought of Bristol as one of the tracks most conducive to speeding penalties. Pit road speed there is 35 mph — the stated limit of 30 mph plus the nonsensical extra five mph NASCAR allows. That tolerance seems like an archaic holdover from the days when they didn’t have precision measuring equipment. It only serves to confuse people and I wish they’d get rid of it.

So is Bristol the biggest threat for speeding penalties? And what makes a track more likely to engender pit road speeding penalties than another track?

How Pit Road Works

I wrote an entire F.A.Q. on pit road speed limits, but here’s the brief version.

• A transponder in each car activates scoring loops embedded in pit road.
• NASCAR knows the distance between every pair of scoring loops.
• NASCAR times how long it takes a car to travel between each pair of scoring loops
• Each track has a pit road speed limit, determined by its size and typical race speeds.

After that, it’s a question of basic physics.

Algebra says that if you know any two of the variables in a three-variable equation, you can calculate the third.

NASCAR knows the distance traveled and the time taken, which means they knows the average speed of each car in each segment of pit road.

NASCAR issues a speeding penalty when a car’s average speed exceeds the speed limit in any segment of pit road.

! Caveats About Counting Speeding Penalties

Although it seems counterintuitive, teams sometimes speed on pit road on purpose.

Let’s say you’ve just had a flat tire. You need to come to pit road for new tires. You’re already going to be at the tail end of the lead lap (at best), so there is effectively no penalty for speeding.

This year, so far, there have been 35 speeding penalties. But 10 of those penalties were incurred after accidents, flat tires, mechanical problems, etc. So there have technically only been 25 speeding penalties in 2026 so far.

So we can’t just count speeding penalties. We need someone with a compulsion to examine each penalty each week and decide whether the speeding was intentional or not.

Lucky for you, that’s me.

Speeding Penalties at Bristol… and Elsewhere

I looked at data from 2022 – 2025 because that’s all the data I have where I’ve sorted through penalties. Judging intent is subjective, so my choices may differ from yours if were you crazy enough to repeat this calculation. But I used a consistent method, so the results should at least be comparable with each other.

My initial penalty count led to a confusing conclusion. That’s because there’s one more factor we must consider. We have to compare the number of penalties to the number of pit stops.

In the four years I’m covering, Darlington had 2429 pit stops over eight races. Bristol had only 1312 stops. That’s partly because the number of stops in a race depends on things like stage breaks and tire wear, but also because Bristol had only one race on the concrete surface in 2022 and 2023.

And the results are…

For comparison, most intermediate tracks come out around 1.5 to 1.75%

One of These Things is Not Like the Others…

You might have noticed the !? by Talladega in the table above. Talladega has a perfectly modest three to six speeding tickets for every race in this dataset except the last two. There were 10 speed nabs in each of those races. This seems like more of a recent issue.

Small Tracks, Big Speeding Penalties

To my surprise, Bristol is not the track most likely to issue speeding penalties. Martinsville and Phoenix hold that dubious honor. The numbers for those two tracks are so similar, I’d call them tied.

Bristol isn’t too shabby, but it’s nowhere in Martinsville and Phoenix territory.

Four of the top five top tracks for speeding tickets are among the shortest tracks. Iowa only had two races. Richmond, which is 3/4 mile in length, is down around 1.5%.

Why Speeding Penalties at Shorter Tracks?

It all has to do with geometry. Not just track geometry, but pit road geometry, too.

Look at how much of pit road at Phoenix is curved. The more curve in the areas policed for speed, the harder it is to keep your speed within limits.

The Marching Band Effect

I was in a marching band throughout junior high. Each row in the band must maintain a straight line. When you’re turning, the people on the outside of the column must take larger steps than those on the inside.

New terminology for me: This is called a gate turn. The video below shows the effect perfectly. The person on the right side of the screen is the pivot and rotates, but doesn’t advance. The guy on the end has to take giant steps because he must cover more ground than everyone else since he’s so far from the pivot point.

You can see how this applies to racing in the diagram below.

And This Has What to Do With Speeding at Bristol?

Remember that NASCAR uses two things in their calculation: the distance between the timing lines and the time it takes for the car to go that distance.

The problem is that the distance is not the same when the path is not straight. If you, for example, cut the corner and went right up the inner part of the track, you could technically be under the speed limit, but still get penalized for speeding because you drove a shorter path than the one NASCAR was expecting.

That’s because NASCAR is using an average speed — speed averaged over each segment of pit road. That’s different than the instantaneous speed — the speed a speedometer would read — and the one radar guns, for example, use.

The stated radius of turns 1 and 2 at Bristol is 242 feet.

• If you travel through a 90-degree angle at this radius, you travel a distance of 380 ft.
• If you use a radius just five feet shorter — 237 feet — you travel the same angle, but you only go 372 feet. It’s only eight feet, but teams calculate the speed as close as possible to the limit.

And just to throw in one more complication, Turns 1/2 are have a slightly different radius than Turns 3/4.

Everyone Knows The Rules

NASCAR provides detailed maps to the teams so they know exactly how long each pit road segment is. Amazon Prime provided a nice graphic last year during their coverage of practice and qualifying showing the timing lines on pit road in yellow.

Bristol poses another problem, however. The rules for reaching your pit are different under yellow and green flags.

There are 20 stalls on the frontstretch and 20 on the backstretch. Under caution, everyone enters the backstretch pit road in turn 2 (the upper right in the figure above) and exits in turn 1.

But when pitting under the green flag, teams can enter in turn 2 or turn 4, whichever is closest to their pit stall. So there’s much more likelihood of a pit road speeding penalty at Bristol under yellow because you’re effectively running twice as much pit road.

Seems Like You Could Use This To Your Advantage, Right?

Teams desperate for every last advantage definitely use the way NASCAR does the pit road speeding calculations to their advantage.

Ten years ago, crew chief realized that, if there was a scoring loop just ahead of your pit box, you could speed coming in because you’d be stopped for 12 seconds. NASCAR would not penalize you for speeding, even though you were for part of the time.

Today, that strategy is amplified and revved up. Listen to spotters guide their drivers onto pit road this weekend on the HBOMax in-car camera feed or the nascar.com scanner feed.

Back in the day, the driver knew what gear to be in and what the tachometer should read. As the driver approached pit road, the spotter would say something like: “At the line, second gear, 3400… now”.

Drivers have moved from tachometers to colored lights on their digital dashes. So now, the cadence from the spotter on a track with a twisty pit road becomes something more like this:

• Eight blue in three, two, one….
• One red… now…
• Three red into your box.

And something similar leaving pit road. It’ll be even more complicated on yellow-flag stops

Teams have optimized this process (like everything else) to gain as much time as possible on pit road. Understanding the process will help you understand your team’s strategy.