Tread for a heavy vehicle tyre, this tread having, when new, a tread surface intended to come into contact with a roadway, this tread having a width W, this tread comprising: - a mid-plane that divides the tread into two halves of equal width, - two main grooves (2, 3) of circumferential overall orientation delimiting a central region C of a width comprised between 15 and 25% of the total width W of the tread, these main grooves having a depth P substantially defining the wearable thickness of the tread, - lateral regions L1, L2 on each side of the central region C, each of these lateral regions being divided into a plurality of elongate raised elements comprising long sides (41, 42) and short sides (43, 44), these elongate elements being delimited by oblique secondary grooves opening into the circumferential main grooves (2, 3), these oblique secondary grooves being inclined by a mean angle A of between 35 degrees and 55 degrees - this angle being measured with respect to the circumferential direction, this tread being characterized in that these oblique secondary grooves have a depth P5 comprised between 30% and 60% of the depth P of the grooves of circumferential overall orientation (2, 3), and in that each elongate raised element of the lateral regions L1, L2 comprises an oblique cut running parallel to the oblique grooves delimiting this elongate raised element and dividing this element into two elongate element halves, each oblique cut opening onto the short sides (43, 44) of the element, and each oblique cut has a total depth P6 at least equal to 75% of the depth of the circumferential main grooves (2, 3 and is formed - progressing from the surface of the tread when the tyre is new toward the inside of the tread - by a sipe extended by an internal canal, this internal canal being intended to form a new groove once the tread is partially worn at the latest before the oblique secondary grooves completely disappear, this internal canal having a mean width at least equal to the mean width of the oblique secondary grooves, each oblique secondary groove and each oblique cut of an elongate raised element being extended in the central region C of the tread by an additional cut formed of a sipe extending into the thickness of the tread in the form of an internal canal, this additional cut formed in the central region C maintaining the same orientation as the oblique grooves of each lateral region L1, L2 and doing so as far as the equatorial mid-plane. - a mid-plane that divides the tread into two halves of equal width, - two main grooves (2, 3) of circumferential overall orientation delimiting a central region C of a width comprised between 15 and 25% of the total width W of the tread, these main grooves having a depth P substantially defining the wearable thickness of the tread, - lateral regions L1, L2 on each side of the central region C, each of these lateral regions being divided into a plurality of elongate raised elements comprising long sides (41, 42) and short sides (43, 44), these elongate elements being delimited by oblique secondary grooves opening into the circumferential main grooves (2, 3), these oblique secondary grooves being inclined by a mean angle A of between 35 degrees and 55 degrees - this angle being measured with respect to the circumferential direction,