Dr. Susan Pike is a faculty researcher at the UC Davis Institute of Transportation Studies. Her research covers study travel behavior and sustainable transportation with an increasing focus on the use of and planning for public transportation. Dr. Pike studies the interplay between environmental policy and individual decisions. Her projects include an interview-based study with transportation stakeholders throughout California to assess their perspectives on the potential impacts of ridehailing. In other work she investigates the decision-making processes that lead to partnerships between transit agencies and ridehailing companies. This study identifies necessary conditions for partnerships to form including internal agency support, and the presence of a policy entrepreneur; as well as barriers to partnerships such as the existence of too many potential challenges and in particular inconsistent understanding of relevant regulations.