67 Pa. Code § 601.101
A semitrailer, or the trailer of a tandem trailer combination, may not be longer than 28 1/2 feet. A tandem combination—including the truck tractor, semitrailer and trailer—which exceeds 85 feet in length is considered an over-dimensional/overweight vehicle which requires a special hauling permit to travel on the Turnpike System.
The provisions of this § 601.101 amended under sections 4 and 12 of the act of May 21, 1937 (P.L. 774, No. 211) (36 P.S. § § 652d and 652l), 74 Pa.C.S. § § 8102, 8107, 8116 and 8117; and 75 Pa.C.S. § § 6110 and 6110.1.
The provisions of this § 601.101 adopted October 29, 1992, effective October 30, 1992, 22 Pa.B. 5321; amended June 23, 2000, effective June 24, 2000, 30 Pa.B. 3175; amended December 1, 2023, effective December 2, 2023, 53 Pa.B. 7489. Immediately preceding text appears at serial page (400466).