Five drivers broke Monaco’s 60km/h pit‑lane limit on Sunday, prompting a number of penalties. Ferrari’s Lewis Hamilton, Mercedes’ George Russell, McLaren’s Oscar Piastri, Alpine’s Pierre Gasly and rookie Franco Colapinto were each flagged, all by a margin of 0.1km/h – Gasly also exceeded it by 0.4km/h on a second offence. The penalties ranged from five‑second stop‑and‑go to ten‑second holds, costing time on the street circuit.

The anomaly stems from Monaco’s pit‑lane geometry and speed recording. Timing loops and on‑car transponders calculate velocity from distance over time, so drivers can shave fractions of a metre by cutting across the white‑line “fast lane”. That shortcut lets the car stay under the measured limit while technically exceeding the true speed. Drivers argued line‑cutting was legal under regulations, leaving FIA to consider rule clarification.

Teams appealed via a right of review, a narrow exception allowing new evidence after a penalty. Alpine could only hope to overturn Gasly’s stop‑and‑go, while Mercedes mis‑served Russell’s sanction during a safety‑car stop, stripping him of a potential podium. The episode highlights how Monaco’s pit‑lane design can significantly reshuffle results.