US 101/I-580 Multi-Modal and Local Access Improvement Project OverviewDesign Alternatives and PhotosCommunity EngagementDocuments & ReportsFAQsGet Involved The Transportation Authority of Marin (TAM) is planning a proposed project to construct a freeway-to-freeway direct connection from northbound US 101 to eastbound Interstate 580 in Marin County. TAM expects to initiate the environmental review and continue community engagement
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