The STIP is the adopted plan of the California Transportation Commission for the allocation of funds to specific projects in future years. Programs identified in the STIP are funded through state and federal gas taxes. The STIP serves as a programming policy for revenues in the State Highway Account and from the Passenger Rail Bond Fund. the major programs include: Flexible Congestion Relief (FCR) The FCR is a statewide capital program for highway and fixed guideway capacity improvements composed of state and federal gas tax revenues. Guidelines are developed by Caltrans and adopted by the California Transportation Commission. FCR Funds are appropriated to major gap closure, backbone arterials, carpool lanes, and some fixed guideway uses. Inter-Regional Roads The Inter-Regional Road program was established for the purpose of improving inter-regional traffic on state highways outside urban limit lines from revenues composed of state and federal gas taxes. Projects eligible for this program are nominated by Caltrans for the State Transportation Improvement Program (STIP). These funds count toward meeting county minimums in whatever counties they are programmed. The federal share of this revenue source is assumed to increase every five years by the Consumer Price Index (CPI) through the end of the Plan. All unallocated Inter-regional Road revenues are transferred to the Flexible Congestion Relief (FCR) fund annually. State Highway Operation and Protection Program (SHOPP) The State Highway Operation and Protection Program is established for the maintenance and operational integrity and safety of the State Highway system. It includes rehabilitation and safety projects, operational improvements, and other work necessary to maintain system integrity.