SR 210 Lane Addition/Base Line Interchange

The SR 210 Lane Addition/Base Line Interchange project, designed to provide increased traffic flow throughout this corridor, will be built as one project. To eliminate the existing bottleneck and provide lane continuity, the SR 210 will be widened from Sterling Avenue to San Bernardino Avenue in the cities of San Bernardino, Highland, and Redlands, as well as an unincorporated portion of San Bernardino County. Base Line Interchange will also be widened from Buckeye Street to Seine Avenue in the City of Highland.

SR 210 Lane Addition and Base Line Interchange Project Webinar
SBCTA hosted a webinar to provide updates on the SR 210 Lane Addition and Base Line Interchange Project and to share information about the upcoming series of six 55-hour directional freeway closures on SR 210. To watch the webinar, click the image below.

Fact Sheets

• English
• Spanish

55-Hour Directional Freeway Closures Coming to SR 210 
Starting the weekend of March 24, crews will begin a series of six 55-hour directional freeway closures on SR 210 as part of the SR 210 Lane Addition and Base Line Interchange Project. These closures will be taken one direction at a time over select weekends. The closures will allow crews to safely perform paving operations on eastbound (EB) and westbound (WB) SR 210 at the on and off-ramp junctures of the San Bernardino Avenue interchange.

The directional freeway closures will take place during weekends from Friday at 10:00 p.m. to Monday at 5:00 a.m., and are expected to be scheduled for the following dates*:

• Friday, March 24 through Monday, March 27 (WB)
• Friday, April 14 through Monday, April 17 (WB)
• Friday, April 21 through Monday, April 24 (WB)
• Friday, April 28 through Monday, May 1 (EB)
• Friday, May 5 through Monday, May 8 (EB)
• Friday, May 12 through Monday, May 15 (EB)

Drivers are encouraged to find alternate routes and avoid the area during the closures.

*Construction is dynamic, and the schedule is subject to change.

EB SR 210 Closures

• EB SR 210 will be closed from 5th Street/Greenspot Road to the I-10 connectors.
• During EB closures, motorists will not have access to San Bernardino Avenue on- and off-ramps as well as the connectors to the I-10 freeway.
• Motorists will be directed to exit 5th Street/Greenspot Road and use Alabama Street to access San Bernardino Avenue and EB/WB I-10.

WB SR 210  Closures

• WB SR 210 will be closed from the I-10 connectors to 5 th Street/Greenspot Road.
• During WB closures, motorists on I-10 will not have access to the EB/WB SR 210 , San Bernardino Avenue and 5 th Street/Greenspot Road.
• Motorists will be directed to exit I-10 at Alabama Street to access San Bernardino Avenue and 5 th Street/Greenspot Road, and enter SR 210 at 5 th Street/Greenspot Road.

Eastbound SR 210 On-Ramp at San Bernardino Avenue – No Access to Eastbound I-10 Connector

Crews implemented a temporary lane configuration that affect traffic movements on EB SR 210. Concrete barriers were installed from San Bernardino Avenue to the EB/WB I-10 connectors to safely separate travel lanes from adjacent work areas. In this configuration, motorists entering EB SR 210 using the on-ramp at San Bernardino Avenue will not be able to access the EB I-10 connector and will be automatically directed onto WB I-10.

Suggested Detour:From San Bernardino Avenue travel south on Tennessee Avenue and turn left on EB I-10 on-ramp to access freeway

Project Update Webinars

• December 9, 2021