Sec. 4. 29-A MRSA §101, sub-§§26-A and 26-B are enacted to read:

26-A.__Gross vehicle weight.__"Gross vehicle weight" or "GVW" means the actual total weight of the vehicle and load.

26-B.__Gross vehicle weight rating.__"Gross vehicle weight rating" or "GVWR" means the weight of the vehicle and load as determined by the final-stage manufacturer, as the rating appears on the vehicle.

Sec. 5. 29-A MRSA §101, sub-§29-A is enacted to read:

29-A.__Interstate highway, interstate system or interstate highway system.__"Interstate highway," "interstate system" or "interstate highway system" has the same meaning as defined in Title 23, section 1903, subsection 3, except that it does not include that portion of the Maine Turnpike designated Interstate 95 and 495 and that portion of Interstate 95 from the southern terminus of the Maine Turnpike to the New Hampshire state line.

Sec. 6. 29-A MRSA §101, sub-§60-A is enacted to read:

60-A.__Registered weight.__"Registered weight" means the gross vehicle weight specified on the vehicle's registration certificate.

Sec. 7. 29-A MRSA §101, sub-§66-A is enacted to read:

66-A.__Single-axle unit.__"Single-axle unit" means one axle, or 2 axles less than 4 feet apart as measured from axle center to axle center.

Sec. 8. 29-A MRSA §101, sub-§78-A is enacted to read:

78-A.__Tandem-axle unit.__"Tandem-axle unit" means 2 or more axles at least 4 feet and not more than 8 feet apart, as measured from axle center to axle center of the extreme axles.

Sec. 9. 29-A MRSA §101, sub-§§86-A and 86-B are enacted to read:

86-A.__Tri-axle semitrailer.__"Tri-axle semitrailer" means a semitrailer that contains one tri-axle unit.

86-B.__Tri-axle unit.__"Tri-axle unit" means 3 axles more than 8 feet and less than 12 feet apart, as measured between the centers of the first and 3rd axles.__If the axle center of a