When the Standard Itself Is Wrong

A measurement error in Monaco’s pit lane turned F1 drivers into cautionary tales and one podium finish into a lesson about data mistakes you can’t take back.

77 Centimeters

I’m an American, so I know that 77cm is about two standard school rulers long. I know that because the ruler was more interesting to me in school than whatever we were doing in geometry.

It’s also the distance that the pit lane speed-limit measurement was off at the Formula 1 race in Monaco this year. The Monaco track is a street race through the narrow roads of the small coastal city-state on the shores of the Mediterranean. The number of on-track passes can typically be counted on one hand.

So, the levers for winning or losing the race are:

• Qualifying
• Pit strategy
• Luck
• Penalties

Formula 1 is a sport of precision. Exacting standards at nearly 200 mph. But standards played a major role in the 2026 Monaco race. For the safety of everyone outside the car, there’s a speed limit on pit road of, typically, 60 km/h, or about 37 mph. Drivers will push that limit to the absolute maximum.

Early in the Monaco race, George Russell of Mercedes received a five-second penalty for speeding in the pit lane. Disastrous, since that would drop the team several places in the race.

Time penalties must be served at the team’s next pit stop. The servicing portion of a pit stop, including changing tires and making adjustments, is considered good when it takes less than 2.5 seconds. When the driver pulls in to serve a penalty, no one can touch the car for the duration of it.

A couple of laps later, Oscar Piastri of McLaren also received a penalty for speeding in the pit lane. Seeing one speeding penalty in a race is odd. Two is remarkable. The cars even have a simple button the driver can push to limit their speed precisely. Teams test this limit in practice and adjust it to squeeze even tenths of a second off the time.

Then, amazingly, a third penalty for speeding in the pit lane was given to Lewis Hamilton of Ferrari. By the end of the race, six pit-lane penalties had been issued.

Six Penalties, One Question

Now it’s a major storyline. What in the world is going on? How can all these drivers, from different teams with different engines, get penalized? Something had to be off.

But the officials can’t just stop the race to adjust a sensor. And the drivers have to serve the penalty at the next pit stop. So, the penalties keep rolling in and getting served.

The most consequential one was for Pierre Gasly of Alpine. He finished third, which put him on the winners’ podium to receive a trophy. It was a huge deal for a driver who has massive talent but has been relegated to teams that aren’t consistently among the top three: Mercedes, Ferrari and McLaren. For him to reach the podium was a massive success and a testament to his skill.

Except for the five-second penalty. If you don’t serve your penalty during a pit stop, the time is added to your race time. It dropped him from third to seventh place. And off the podium. Formula 1 is a European sport, so it also has exacting bureaucracies. His team appealed the penalty.

Formula 1 eventually figured out the cause: Cadillac.

This is the first year Cadillac joined Formula 1. Many teams, when they join, buy an existing team and rebrand it. But Cadillac is the 11th team and a brand-new one. So, Formula 1 had to lengthen the pit area to accommodate the new team.

Monaco has no space as a city and certainly not as a racetrack. Formula 1 squeezed in another team, but doing so added 77 centimeters to the racing line through pit road. That threw off every calculation of the safe speed through the lane. In a sport of exacting standards, the standard was off.

Once “the stewards,” as the faceless bureaucracy is called, found the mistake, they reversed Pierre’s penalty.

No Going Back

But the moment Gasly had worked so hard for, standing on the podium, was gone. He didn’t get to celebrate by spraying guys he has raced with since childhood from an absurdly large bottle of Moët. He didn’t get to hoist an abstract art sculpture that represents the spirit of third place at Monaco.

And what about every driver who served an ill-gotten penalty? Oh well. You can’t take back time and right the wrong.

So much of data work is an iterative process. The stewards will have a root-cause analysis from their mistakes at Monaco. There will be a 30-page corrective action plan signed by directorates and institutes. But the race is done, and the results are in.

Sometimes, there’s just no going back to correct the data mistake.

Be careful out there.

— Shaun