Tow couplings and fifth wheels are a critical safety component of heavy vehicle combinations and Vehicle Standards Bulletin 6, or VSB6, is the national standard for these modifications. In this interview, NHVR officer, Matt Fletcher (Senior Advisor - Vehicle Safety Standards) speaks with Bob Martin, Branch Manager for QLD, NSW and Papua New Guinea with JOST Australia and an approved person for heavy vehicle modifications. Bob outlines what to look for when selecting tow couplings and fifth wheels, the role of approved vehicle examiners and the latest technological developments in this field.