Provides that, if the joint November 2007 ballot proposition established under this act is not approved by the voters, the participating counties shall, beginning at the November 2009 general election, submit to the voters a regional transportation investment plan as part of a single ballot proposition that includes, in conjunction with RCW 81.112.030(10), a plan to support an authority's system and financing plan, or additional implementation phases of the system and financing plan, developed under chapter 81.112 RCW. The regional transportation investment plan shall not be considered approved unless both a majority of the persons voting on the proposition residing within the proposed district vote in favor of the proposition and a majority of the persons voting on the proposition residing within the regional transit authority vote in favor of the proposition.