Tread Comprising Interrupted Grooves

Tread () for a tire of a heavy-duty vehicle, having a tread surface (), this tread () comprising, near to each of its edges (), a plurality of open wells () on the tread surface when new, these open wells () of depth Pmax being arranged circumferentially with a mean distance D between two consecutive open wells; each open well () being delimited by two main faces () facing one another, this tread being such that each open well () is connected to at least one hidden cavity () formed within the tread, this hidden cavity () opening into a main face () of said well.