Aging may have an impact on psychological and physical abilities, which are important for driving. As a result, the aging population (age 65 and above) require special considerations in designing transportation infrastructure. Many transportation agencies have implemented engineering improvements designed to improve safety of drivers, especially those who are 65 years and above. In many cases, such improvements have benefited drivers of all ages. A recent study completed in Michigan have identified roadway features which pose difficulty to older drivers more than drivers of other ages. Another study has evaluated the effectiveness of specific engineering improvements on reducing older adult crashes. The results from these two studies will be discussed to emphasize unique characteristics of older adults related to driving safety.