SR-405 Tukwila – Lynwood, USA

Consultancy Services for Detailed Engineering Design, Tender Documents, and Construction Supervision of Widening and Strengthening from 6 lanes to 8 lane for State Route 405 from Tukwilla To Lynwood Washington, USA

Traffic in the last few years has increased on the SR 405 from Tukwilla to Lynwood, specially during morning and evening hours. There are quite a bit delays at various location specially at exist and entry points. The traffic studies show that 6 lane divided highway shall be increased to 8 lane divided highway with four lanes in each direction. The road is a access controlled highway. The stretch has 24 major bridges that will need widening. Six bridges are 250 meters, six bridges are 300 meters long, 2 bridges are 500 meters length and 10 bridge are 700 meters in length. Consultant will develop design, bid documents and provide construction supervision.