One of the primary goals of USDOT is to make the U.S. transportation system the safest In the world. In order to fulfill this goal, it is important to understand how to improve highway safety for all users – including those users that may have different sensory inputs than the general population. In fact, some highway users belong to groups with special needs that have not been studied previously. The purpose of this research was to initiate collection of knowledge regarding deaf and hard of hearing drivers.