The $130m preservation projects on the US Interstate-90 will begin this spring and summer, according to Washington State Department of Transport.

The cross-state route, east of Snoqualmie Pass, will be upgraded using funds from the 2005 Transportation Partnership Account, and American Recovery and Reinvestment Act.

Since the I-90 highway is a vital east-west transportation corridor, the multi-season projects are expected to hamper freight-truck movements and passenger vehicles.

The project work includes adding lanes, stabilising slopes, rebuilding bridges, preserving existing concrete pavement and replacing deteriorating ones, and creating a smoother, safer driving surface.