These proceedings includes an overview of the October 2009 conference and six commissioned resource papers, including the two keynote presentations. This fourth international conference included researchers, academicians, practitioners, and students from more than a dozen countries. The program addressed longstanding issues relating to gender concerns in transportation that merit ongoing attention. It highlighted the latest research on changing demographics that affect transportation planning, programming, and policy making as well as the latest research on crash and injury prevention for different segments of the female population. Special attention was given to pregnant and elderly transportation users, efforts to better address and increase women's personal security when using various modes of transportation, and the impacts of extreme events such as hurricanes and earthquakes on women's mobility and that of those for whom they are responsible.