Provides for an $8.7 billion budget for for state transportation agencies and programs for the 2013-15 fiscal biennium that allocates money for maintenance, infrastructure, and existing large-scale projects such as the SR 520 floating bridge and Seattle's Alaskan Way Viaduct tunnel ($900 million). This budget also includes about &82 million for design work on the I-5 Columbia River Crossing project. The bill also modifies appropriations for the existing the 2011-13 transportation budget.