Highway 1/101 Interchange Realignment: A Phased Approach
Work at the Highway 1/101 interchange was a part of phased construction to realign the roadways with the new High Viaducts, reconstruct the Highway 1/101 interchange ramps, and construct safety shoulders and a landscaped median on Highway 101. See how crews did the complicated phasing of this area of the project.
View the simulation slideshow to see the realignment shifts that led to the final roadway.
Beginning in mid-July 2014, northbound Highway 101 traffic was shifted slightly to the north for approximately 4-6 weeks as crews prepared a temporary roadway to carry southbound traffic.
Early Fall 2014
In early fall 2014, southbound Highway 101 traffic was shifted onto the temporary roadway to allow crews to begin construction of the final southbound roadway and safety shoulder.
Once the final southbound roadway and safety shoulder were completed, northbound and southbound traffic were shifted onto the final southbound roadway. Crews then constructed the final northbound roadway, connected it to the northbound High Viaduct and completed the "hook ramp" leading from northbound Highway 101 to southbound Highway 1.
Final Roadway, Summer 2015
The Highway 1/101 interchange realignment was completed in summer 2015 following a weekend closure on July 9-12 to shift traffic to the new, final roadway. The completed interchange improves traffic safety with wider lanes and continuous shoulders for emergency and disabled vehicles. The northbound and southbound roadways are separated by a wide median.
Aerial Image of Final Roadway, Fall 2015
This aerial image shows traffic traveling on the final roadway and hook ramp as of September 2015.