the new Homer M. Hadley Memorial Bridge over Lake Washington to carry westbound traffic and the HOV/reversible lanes, or express lanes, from Bellevue to Seattle, with general-purpose traffic allowed to use the reversible lanes in between Mercer Island and Seattle. The express lanes carry westbound traffic in the morning and eastbound traffic in the afternoon. Further improvements are now being made to put HOV lanes in both outer roadways to ready the center roadway for Sound Transit's Link light rail. Interstate 405 Interstate 405 begins in Tukwila at I-5, SR 518, and Westfield Southcenter, and continues east through Renton and then turns north and runs through Bellevue, Kirkland, and Bothell, before turning northwest and crossing I-5 in Lynnwood (near Alderwood Mall), where it becomes SR 525, a freeway for its first few miles. I-405 was built in stages between 1955 and 1968, with a major upgrade north of Bellevue to Bothell in 1972. HOV lanes were added in the 1980s and 1990s, the interchange between I-405 and SR 520 was upgraded in the early 1990s, and new ramps have been added in downtown Bellevue in recent years to supplement the original interchange at NE 8th Street. SR 520 SR 520 begins in Seattle at I-5 and continues east across Lake Washington on the Evergreen Point Bridge through Bellevue, interchanges with I-405, then turns northeast, passes the main Microsoft campus (which funded an overpass at NE 36th St and an interchange at NE 40th to supplement the existing interchange at NE 51st St), and terminates in Redmond at SR 202. The section between I-5 and Bellevue Way was opened in 1963, with the interchange at I-405 built in 1966. It was further extended to it current terminus between 1973 and 1982. The Washington State Department of Transportation is currently widening the freeway on the Eastside, modifying interchanges, and moving the HOV lanes to the inside of the roadway. SR 167 SR 167, also known as the Valley Freeway, begins in Renton at I-405 and continues south through Kent, Auburn, where it interchanges with SR 410, Pacific, and Algona, then interchanges with SR 410, and currently terminates at SR 161. The Valley Freeway was built in stages between 1964 and 1977, with a major upgrade of its southern end in 1986. The Washington State Department of Transportation is currently planning to extend the freeway to Tacoma. SR 167 has HOV lanes between