Provides $8.9 billion for state transportation agencies and programs for the 2013-15 fiscal biennium to allocate money for maintenance, infrastructure, and existing large-scale projects, such as the SR 520 floating bridge and Seattle's Alaskan Way Viaduct tunnel. 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 2011-13 transportation budget.