In 2008 the Legislature funded a study of multimodal concurrency to further explore methods of quantifying alternative transportation modes and incorporate them into local concurrency management programs. In response to this legislative proviso, the PSRC and City of Bellevue collaborated with King County Metro to develop multimodal measures for peak and off-peak periods; a concurrency approach for the Bellevue regional growth center; and a strategy for integrating all modes (roadways, transit, ferries, walk, and bike) into considerations for sustained mobility.