The viaduct expanded from four lanes to six lanes and turned northwest as it followed Alaskan Way and the city's waterfront on the west side of Pioneer Square; the area underneath the viaduct was used for street parking between construction periods. It passed east of the state ferry terminal at Colman Dock and reached a set of ramps serving downtown traffic: the Columbia Street onramp to the southbound lanes and the Seneca Street offramp from the northbound lanes. The waterfront section of the viaduct was noted for its scenic views, which include Elliott Bay, the distant Olympic Mountains, and the city's skyline. Between the Seattle Aquarium and Pike Place Market, the double-decker viaduct ended as SR 99 split into a pair of side-by-side elevated lanes that traveled over the north portal of the Great Northern railroad tunnel and under Victor Steinbrueck Park. SR 99 then came to an interchange with Elliott and Western avenues, which marked the north end of the viaduct and the south end of the four-lane Battery Street Tunnel. The Western Avenue crossing included a notch in the southbound railing of the viaduct, which was cut out to pass around a column of the Seattle Empire Laundry Building.