Every bus shall carry at least three portable emergency reflective triangles, as specified by Chapter 167 (relating to portable emergency warning devices). They shall be mounted in an accessible place in the driver's compartment.
67 Pa. Code § 171.83
The provisions of this §171.83 issued under the Vehicle Code, 75 Pa.C.S. §§ 4103, 4551-4553 and 6103.