The rallying cray for agricultural safety and health for over half a century has been tractor overturns, which kill between 150 and 250 farm workers each year in the U.S. The most interesting aspect of this issue is that the solution to the problem has existed about forty years - an engineering intervention that has been tested, certified, and proven effective. The effectiveness of this intervention has been shown not just in some esoteric experimental sense, but through clearly documented decreases in tractor overturn fatalities on a national scale (Thelin, 1990). This intervention not only provides proven protection from tractor overturns, but when used as recommended, reduces the risk of death from operators falling from moving tractors, and from collisions between tractors and other vehicles on public roadways. In fact, the effectiveness of this intervention would classify it as a "wonder drug" if we were discussing a vaccine for some chronic disease. What is this "wonder drug," this proven saver of lives? It is the roll-over protective structure, more commonly known by its acronym, the ROPS.