NORWALK — Caltrans has announced the opening of a fourth lane in each direction of Interstate 5 through Santa Fe Springs and Norwalk.

The lane opening is part of a $1.9 billion bond project adding one general purpose lane and one carpool lane in each direction of the 5 Freeway between the 605 and the Orange County line.

In October, a fourth northbound lane on the I-5 opened to traffic from Alondra Boulevard to north of Imperial Highway. A fourth southbound lane opened from Imperial Highway down to the Orange County line at Artesia Boulevard.

When the Florence Avenue interchange project finishes in spring 2020, Caltrans will extend the open fourth lanes to the 605 Freeway interchange.

The entire project is anticipated to wrap up by late 2021, when the Valley View Avenue interchange project completes.