Visit our help page if you have questions regarding downloading and installing Tif image viewers. Highway NTSB Rec. RSPA will address this recommendation in a Notice of Proposed Rulemaking under development. If the thickness of the appurtenance materials has corroded to a predetermined percentage of its manufactured thickness, require that access to the tank sheet material within the air cavity be made and that the thickness of the tank sheet material be measured. Manufacturing costs, producibility and marketability are now being evaluated.
Research is on-going.
A study was prepared by the University of Michigan Transportation Research Institute outlining the results of a study to investigate and analyze the forces of energy involved in rollover crashes. A study was prepared by the University of Michigan Transportation Research Institute outlining the results of a study to investigate and analyze the forces of energy involved in rollover crashes. NPRM under development.