Tread with an improved drainage space

A tire tread band comprising:

• a tread surface to come into contact with the road surface;
• at least two wearing layers superposed in the thickness direction of the tread, comprising:
• a first wearing layer formed by a plurality of raised elements each comprising a contact surface, and intended to be in contact with the road surface when the tread is new, and comprising at least grooves of circumferential overall direction;
• and
• at least one other wearing layer disposed radially inward of the first wearing layer and adapted to come into contact with the road surface after the first layer has entirely worn away, comprising:
• at least grooves of circumferential overall direction that extend from the first wearing layer through the at least one other wearing layer;
• at least one channel extending in the circumferential overall direction, this at least one channel disposed radially inward of the first wearing layer, enclosed within the tread band when the tread is new, and opening onto the tread surface to, form another groove of circumferential overall direction as soon as the other wearing layer is reached after the first wearing layer or other wearing layer that immediately precedes it has completely worn away, and having a bottom at a same radial level as a bottom of the groove of circumferential overall direction, and
• distinct from the first wearing layer, a plurality of transverse incisions distributed in the circumferential direction, each transverse incision extending from the at least one channel of the other wearing layer, or from the other groove of circumferential overall direction formed therefrom when the other wearing layer is reached in a direction which is not circumferential, so as to open fully or partially into the at least one groove of circumferential overall direction, and do so irrespective of the level of wear of the other wearing layer.