OCTA in cooperation with Caltrans improved 16 miles of the San Diego Freeway (I-405) between State Route 73 (SR-73) and Interstate 605 (I-605). Including the construction of 405 Express Lanes from SR-73 to I-605. The new express lanes – incorporate the existing carpool lanes and connectors that opened in 2014 – they are two lanes in each direction.

    
        
        
            
                
        
     
        
Newland Street
                
            I-405 Improvement Project Interactive 360° Videos
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Project by the Numbers
The I-405 Improvement Project allows Orange County to keep pace with expected job, housing and population growth, while providing safe and reliable multimodal travel throughout the region.
                            16 Miles of Freeway
                        
                            
                                Improved for a quicker, more enjoyable driving experience
                            
                    
                            18+ Bridges
                        
                            
                                Replaced and improved
                            
                    
                            11 New Bike Lanes
                        
                            
                                Added for more cycling routes
                            
                    
                            11 New Sidewalks
                        
                            
                                Added for pedestrian accessibility
                            
                    
                            40,000+ Jobs
                        
                            
                                Created during the entire life of the project
                            
                    
                            6 Corridor Cities
                        
                            
                                Plus the community of Rossmoor collaborating to keep traffic moving during construction
                            
                    Funding
The $2.16 billion OC Go project, Measure M, being constructed in cooperation with Caltrans, will be funded mostly through a combination of local, state and federal funds, with the express lanes portion of the Project paid for by those who choose to pay a toll and use the 405 Express Lanes.
OC go sales tax funds
State Funds
federal TIFIA
Federal Funds
Project Partners
 
                 
                Organizations
- OCTA
- Caltrans
- FHWA
- 40 separate utility owners
- Orange County Flood Control
- Union Pacific Railroad
- Army Corps of Engineers
- U.S. Navy
- Emergency service providers such as police and fire
Cities
- Costa Mesa
- Fountain Valley
- Westminster
- Huntington Beach
- Garden Grove
- Long Beach
- Los Alamitos
- Seal Beach
- Community of Rossmoor