What are competition cautions?

A competition caution is a caution period called early in a race – before any actual incident (crash, debris, etc.) has happened – to let teams get a scheduled check or adjustment done, usually after a certain number of laps.

The most common reason is tire wear. If a new track surface, new tire compound, or unusual conditions mean tires might degrade unpredictably, NASCAR will mandate a caution after a set number of laps specifically so every team can pit and inspect/change tires before anyone risks a tire failure at speed. It's essentially a built-in safety check, scheduled ahead of time and announced to teams before the race starts (or triggered by conditions like extended practice/qualifying being rained out, meaning teams didn't get normal running to validate tire wear).

During a competition caution, the field bunches up and can pit under caution just like any other yellow flag, but since it's planned rather than incident-based, there's no wreck or debris to clean up. It's purely a data/safety-driven pause built into the race procedure.