There is no doubt that traffic is an ever-increasing problem, especially in metropolitan areas. The city of Bellevue, Wash., is no exception.

Over the past few years, Interstate 405 in Bellevue has posed an increasing problem: traffic congestion that has significantly increased the number of accidents and the time spent in travel. Currently, I-405, as the main bypass around the east side of Lake Washington, has a daily traffic congestion of six to 10 hours and costs millions in wasted time and fuel.