Road crews build the base for the future new southbound lane in Renton.
As the subbase takes place for the new lane of southbound I-405, crews install new drainage systems.
A demolition crew takes out an old retaining wall along southbound I-405.
Bridge workers use a manlift to get to the outside edge of the I-405 bridge over the railroad tracks in Tukwila.
Road crews began building a reinforced slope along northbound I-405 in Renton.
The skeleton of a new bridge barrier along northbound I-405.