WSDOT has looked at a range of options to address the projected increase in population and employment along this corridor. Studies acknowledge the importance of connecting I-405 and SR 167 to form a seamless corridor. The Eastside Corridor (made up of sections of Snohomish, King and Pierce counties, stretching down I-405 and SR 167 to SR 512) vision includes new highway lanes, improved interchanges, express toll lanes, expanded transit service including bus rapid transit (BRT) and expanded vanpool programs