Caltrans has identified the need to evaluate the road weather information systems (RWIS) that have been installed in the state. This project will help Caltrans in determining how to improve its RWIS and to move towards a statewide linked network. Through the work on this project, Western Transportation Institute, Montana State University-Bozeman (WTI) will develop three technical reports, a GIS project, and a final report on Caltrans RWIS. The needed information for these deliverables will be collected through surveys of maintenance staff, interviews with key RWIS end users (Caltrans and potential partners), and a national review of state of the practice. Project tasks will be completed within a twelve-month time frame by June 2002. This project is designed to provide Caltrans with a detailed assessment of RWIS use and recommended improvements. WTI hopes to provide a unifying vision for the state while respecting the distinct needs of the districts.