Projects Home ► ProjectsCCTA is responsible for funding, planning, and executing projects that manage traffic congestion, improve public safety, and increase easy access to transit for all residents.HIGHLIGHTS Caldecott Tunnel Fourth Bore 680 Southbound Express Lane State Route 239 Innovate 680 Interstate 680 / State Route 4 Interchange Improvements Quarterly Project Status Report ALL PROJECTS Submit Project StatusCompleted In Progress Upcoming Cancelled