The Southbound SR-55 Freeway Ramp Connector to I-405 will be closed for the entire weekend so that Caltrans crews can complete the Continuous Reinforced Concrete Pavement (CRCP) for this connector that ties-into Southbound I-405 and the Off-Ramp to the Orange County/Santa Ana Airport. Similarly, the Northbound SR-55 Freeway Ramp Connector to I-405 Southbound will also be closed to accommodate this work along with the Southbound SR-55 MacArthur Boulevard On-ramp that will also be closed from Santa Ana (use Bristol Street or MacArthur Boulevard at the I-405 for access instead).

In support of this work, the I-405 Southbound #5 and #6 lanes between Bristol Street and MacArthur Boulevard will also be closed. However, access from Bristol Street to Southbound I-405 will be open along with the access to the Southbound I-405 to Northbound SR-55 Connector. Similarly, the I-405 Southbound MacArthur Boulevard Off-ramp will be open to access the Airport. These closures will be from Friday, September 18, 2020 starting at 10 p.m. until Monday, September 21, 2020 at 5 a.m.

These closures can be expected to cause delays to access the Orange County/Santa Ana Airport. The detour to access the airport from Southbound SR-55 is:

1. Take Southbound SR-55 to I-405 Northbound,
2. Exit Bristol Street,
3. Turn left on Bristol Street,
4. Turn right onto Southbound I-405 On-ramp, and
5. Continue south on I-405 and follow the signs to your destination. The Southbound I-405 MacArthur Boulevard Off-Ramp will be open.

The detour for Northbound SR-55 to Southbound I-405 is:

1. Take Northbound SR-55 to MacArthur Boulevard Exit,
2. Turn right onto MacArthur Boulevard and continue over the I-405 Freeway, and
3. Turn left onto the I-405 Southbound On-Ramp or continue straight to the airport.

For Southbound I-405 traffic, take the I-405 south and follow the signs to your destination. The Southbound I-405 MacArthur Boulevard Off-Ramp will be open. Please plan for delays and we appreciate your patience while this important work is completed.

Electronic Freeway Changeable Message signs will notify drivers and work updates are also available via Twitter, Facebook and Instagram using Caltrans handle: @CaltransOC

This schedule is subject to change due to traffic incidents, weather, availability of equipment and/or materials, and/or construction-related issues. For more information, you may contact the District 12 Public Information Office at (657) 328-6000.

For anyone with sensory disabilities requiring alternate formats (i.e. Braille, large print, sign language interpreter, etc.) and those needing information in a language other than English, please contact Angela Madison at (657) 328-6594 or TTY 711.