Tina Greenfield is the Road Weather Information Systems (RWIS) Coordinator for the Iowa Department of Transportation. She oversees the installation and maintenance of the Iowa DOT's RWIS weather stations, organizes winter maintenance research and field evaluations, and analyzes the Department's salt use and winter operations performance and processes. Tina is the current chair of the Transportation Research Board's Winter Maintenance Committee and represents her agency for the Aurora pooled fund research consortium. She graduated from Iowa State University with a Master's degree in meteorology before joining the Iowa DOT in 2004.