Tread wear indicators (yellow) located inside the main tread

PDF) TireEye: Optical On-board Tire Wear Detection

How to Measure Tire Tread Depth? - Priority Tire

What Does My Tire Tread Wear Pattern Mean? - The Auto Doc

Tyre Tread Depth - Check Tread Depth

Measurement errors depending on the experimental setup

What is a tread wear indicator? - Quora

Johannes BETZ, Professor, Professor, Technische Universität München, München, TUM, Department of Mobility Systems Engineering

Tread wear indicators (yellow) located inside the main tread

PDF) TireEye: Optical On-board Tire Wear Detection