El Dorado County Transportation Commission (EDCTC) is a state-mandated Regional Transportation Planning Agency (RTPA). As such, EDCTC  prepares the Regional Transportation Plan (RTP) and Regional Transportation Improvement Program (RTIP) for the Western Slope of El Dorado County (excluding the Tahoe Basin). EDCTC is also responsible for the administration of Transportation Development Act (TDA) funds for El Dorado County jurisdictions, excluding the portion of the County within the Tahoe Regional Planning Agency boundaries.