 Interstate 45 has a southern terminus in Galveston and serves as a main <unk> to Galveston from mainland Galveston County and Houston . Farm to Market Road <unk> ( locally called <unk> Boulevard ) connects Galveston to Brazoria County via the San Luis Pass @-@ <unk> <unk> Bridge . State Highway 87 , known locally as Broadway Street , connects the island to the Bolivar Peninsula via the Bolivar Ferry . A project to construct the proposed Bolivar Bridge to link Galveston to Bolivar Peninsula was cancelled in 2007 . 
