Interstate 5 via an express lane ramp, was the former Convention Place station at the intersection of 9th Avenue and Pine Street near the Washington State Convention Center. Until its closure in 2018, Convention Place was the only bus-exclusive station in the tunnel, and consisted of four sheltered platforms in a sunken, open-air layover space below street level. Buses entered the tunnel from 9th Avenue and passed under the historic Camlin Hotel, before joining the University Link Tunnel used by light rail trains headed north for three blocks under Pine Street to Capitol Hill station. The DSTT enters Westlake station under Pine Street between 3rd and 6th avenues, located between the Westlake Center shopping mall and Westlake Park. The station features a two-block-long mezzanine with exits to Pine Street and several retailers, including the Westlake Center, the former The Bon Marché flagship store, and the Nordstrom Building, as well as the former King County Metro customer service center. The area around the station is known as the Westlake Hub, with connections to the South Lake Union Streetcar and the Seattle Center Monorail as well as the King County Metro and Sound Transit buses. Leaving Westlake Station, the bored set of twin tunnels turn south under Century Square to follow 3rd Avenue and its transit mall through the central business district, parallel to the shoreline of Elliott Bay. Three blocks south of Pine Street, buses and trains enter University Street station, located between Union and Seneca streets adjacent to Benaroya Hall and 1201 Third Avenue in the financial district. The station has a split mezzanine, with entrances to 2nd Avenue and University Street accessible from the north half, and an entrance to Seneca Street from the south half. From University Street, the tunnel continues under 3rd Avenue for five blocks, entering the Pioneer Square neighborhood and historic district. At this point, 3rd Avenue passes several of Seattle's skyscrapers, including the historic Seattle Tower, Safeco Plaza, the Fourth and Madison Building and the Wells Fargo Center. Within University Street station, the tunnel passes over the century-old Great Northern Tunnel with a clearance of . Pioneer Square station is located between Cherry Street and Yesler Way, with four entrances to nearby streets and Prefontaine Place serving two mezzanines. The station serves the administrative centers of the Seattle and King County governments, located within walking distance of Seattle City Hall, the Seattle Municipal Tower,