Pneumatic Tire Tread for a Heavy Duty Vehicle Comprising Stone-Expelling and Noise-Preventing Protuberances

A tire tread () for a heavy construction plant vehicle, and aims to improve both its ability to not retain stones in its voids, during off-road use, and its ability to dampen the noise that it generates, during on-road use. At least one longitudinal groove () of the tread () has a longitudinal distribution of protuberances (), and any protuberance () has a height H′ at least equal to 0.9 times the depth H of the groove () and has a first portion (), having a height H a width W and a thickness T and a second portion (), having a height H a width W and a thickness T satisfying the relationships: H′=H+H 0.6*H′=H