Caltrans will temporarily close Bore #3 of the Caldecott Tunnel and a 3/4-mile-long stretch of westbound Highway 24 west of the tunnel in Oakland for several hours during the early morning of Sunday, March 2nd. The purpose of the closure is to facilitate the removal of 80-foot-wide highway directional sign that has been replaced by new directional signs. Eastbound traffic on SR-24 will not be impacted by this closure, and will remain open to traffic.... Read the rest
On Friday, November 15th at 1:30 p.m. U.S. Department of Transportation Secretary Anthony Foxx will join project partners to celebrate the construction of the Caldecott Fourth Bore with a ribbon-cutting ceremony. The ceremony will be attended by: U.S. Secretary of Transportation Anthony Foxx Caltrans Director Malcolm Dougherty Metropolitan Transportation Commission Chair Amy Rein Worth Contra Costa Transportation Authority Chair Janet Abelson Student designers of the Fourth Bore medallions The event will happen near the east portal of the Caldecott Tunnel in Contra Costa County.... Read the rest
Starting on Saturday, October 5 and continuing through Saturday, October 12, overnight closures are anticipated for bores #2 OR bore #3 (alternately) of the Caldecott tunnel. The Tentative Schedule for Bore #2 OR #3 Overnight Closures is as follows: Friday/Saturday Nights:  11pm to 9am Weeknights:  10pm to 4am Please note that Bore #3 closures will also require overnight closures of the Westbound Fish Ranch Road On-Ramp in Orinda and the Westbound Caldecott Lane Off-Ramp, as follows: 10 p.m.... Read the rest
On Tuesday, September 10, 2013, the westbound Fish Ranch Road on-ramp in Orinda, Bore Three and the westbound Caldecott Lane off-ramp in Oakland will be closed, beginning at 10:00 p.m. and reopening at 4:00 a.m. on Wednesday, September 11, 2013. In addition to the excavation of a 3,400-foot-long tunnel north of the existing three bores, the $405 million Caldecott Fourth Bore Project includes traffic improvements on the eastern and western sides of the tunnel.... Read the rest
On Friday, September 6, 2013, the westbound Fish Ranch Road on-ramp in Orinda, Bore Three and the westbound Caldecott Lane off-ramp in Oakland will be closed, beginning at 10:00 p.m. and reopening at 9:00 a.m. on Saturday, September 7, 2013. In addition to the excavation of a 3,400-foot-long tunnel north of the existing three bores, the $405 million Caldecott Fourth Bore Project includes traffic improvements on the eastern and western sides of the tunnel.... Read the rest
On Wednesday, September 4, 2013, the westbound Fish Ranch Road on-ramp in Orinda, Bore Three and the Caldecott Lane off-ramp in Oakland will be closed, beginning at 10 PM and reopening at 4 AM on Thursday, September 5, 2013. View the Caldecott Tunnel Traffic Advisories page... Read the rest
Closures this evening: On Tuesday, August 27, 2013, the westbound Fish Ranch Road on-ramp in Orinda, Bore Three and the Caldecott Lane off-ramp in Oakland will be closed, beginning at 10 PM and reopening at 4 AM on Wednesday, August 28, 2013. In addition to the excavation of a 3,400-foot-long tunnel north of the existing three bores, the $405 million Caldecott Fourth Bore Project includes traffic improvements on the eastern and western sides of the tunnel.... Read the rest
The fourth bore of the Caldecott Tunnel  has what is called a Fire-Life-Safety System as illustrated below. Fire-Life-Safety System includes: Emergency lights Carbon monoxide and nitrogen oxide sensors monitor air quality. 19 jet fans mounted at the top can redirect air flow in either direction. 17 emergency stations equipped with a fire extinguisher, manual fire alarms and emergency phones. Video image detectors to notify operators of an incident in the tunnel.... Read the rest
In November, it was announced that Metropolitan Transportation Commission Photographer Karl Nielsen’s photograph of the Caldecott Tunnel Fourth Bore breakthrough won grand prize in AASHTO’s Faces of Transportation competition. The photo took grand prize amongst 126 entries across three categories. The breakthrough occurred in November of 2011 when the east and west sides of the tunnel met. Here’s an awesome video of it happening: Karl Nielsen’s photo of this Caldecott Tunnel shotcrete nozzleman also won in the Building the Future – Individual category.... Read the rest
Image credit: David Yu 511CC’s 2012 Year in Review From the Caldecott Tunnel breakthrough to Bay Area transit agencies celebrating milestones for service, 2012 was a great year for biking, transit and transportation. Here are some of this year’s top stories. Top Tweets Some of our most popular tweets (number of link clicks) in 2012 linked to these articles: Image credit: Eric Fischer For your viewing pleasure – BART stats on a map BART app map Caldecott Fourth Bore Medallion Design Competition (view winning and honorable mention entries here) Bay Bridge demolition will last longer than first projected BART introduces new automated Twitter feed for service advisories A book shelf for your bike How can cities make life easier for the elderly?... Read the rest
Bike to Work Day 2017