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Westbound traffic jams Interstate 580 in Livermore, August 2011.

Q Maybe this has been asked. When will Interstate 580 west to south Interstate 680 be upgraded? It's been an engineering disaster for more than 30 years, with oncoming traffic from two entrances while everyone is trying to get over to one lane to go south on I-680. There are not many days we do not see rear-enders because of the backups. Need more? I could go on.

Lorna Mackintosh

San Jose

A Many others also have rants about this interchange and other vital roads in Alameda County.

Q As a commuter from the Central Valley, I cannot help but wonder why a flyover from west I-580 to south I-680 has not been built. The backup can start as far back as Tracy or the Altamont in Livermore, long before the interchange. A commute that used to take one hour, 15 minutes is now taking two to 21/2 hours to reach the East Bay or the South Bay. I am sure I am not the only one tired of sitting in traffic every morning.

John Howard

Castro Valley

A Oh, you are not.


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Q I frequently drive west on I-580 in the Livermore/Pleasanton/Dublin area and am always amazed at how traffic backs up for miles before the I-680 exit. I am not driving during commute hours. People make crazy lane changes as they try to merge and drivers merging onto the freeway before the I-680 exit take their lives in their hands while negotiating the traffic. Are there plans to improve that exit and interchange? ... The 580-680 interchange is a daily headache in my life. There are daily accidents and if one were to add up the cost of both life and vehicles, the project would have more than been paid for. Your update is greatly appreciated!

Scott-Angelique Mitta, Julie Mar and many more

A Down the freeway, there is another major headache.

Q Is there anything to resolve the backups on northbound I-680 out of the Santa Clara Valley over the Sunol Grade? ... Sunol Grade northbound has been a nightmare for the past 12 years during the evening commute. Any chance of seeing four lanes from Mission/Warm Springs to the 84 east exit to Livermore? I heard Caltrans might widen I-680 north and finish by 2018.

John Jurgensmeier, Glenn Stewart and more

A We will know more after Tuesday's election. Alameda County residents will vote on a sales tax measure unlike any tried in the Bay Area before. Officials want to make permanent an existing half-cent sales tax for transportation that would otherwise expire in a decade, and to add another half-cent tax on top of that.

Measure B1 would raise more than $7.7 billion to upgrade freeways over the next few decades, fill potholes, help pay for a BART extension to Livermore, improve service for bus riders and the disabled and fund pedestrian and bicycle upgrades. The measure needs a two-thirds vote, and the outcome will affect drivers in Contra Costa, Santa Clara and San Joaquin counties as well Alameda County. Go to alamedactc.org/app_pages/view/8084#shortcut2 for more details.

And yes, this would include funds for the 580-680 interchange and a carpool lane on north I-680 over the Sunol Grade.

Q We were returning home via Interstate 205 from Lake Tahoe a couple of Sundays ago at 8:15 p.m. when all of a sudden traffic came to stop as we approached North Tracy Boulevard. We eventually saw a sign indicating road work was going on and that the right lane was closed. It took us 30 minutes to go five miles.

It seems that starting work at 8 p.m. on a Sunday night makes no sense since there are thousands of cars returning from a weekend away. I would suggest that road work on a Sunday doesn't begin until at least 9 p.m. or later.

Wink Winkleman

Sunnyvale

A You make some good points, and Ken-the-Caltrans-Man says the state "truly apologizes for the inconvenience caused to drivers by traffic delays on I-205 at Tracy Boulevard."

He said traffic Oct. 14 was heavier than anticipated, even for a typical Sunday night, when weekend travelers are returning home. Caltrans did turn on the message sign on southbound Interstate 5 before I-205 to alert motorists of the delay, but it was activated a bit late because of heavier-than-expected traffic. The state is installing auxiliary lanes on I-205, a job that should wrap up after Thanksgiving.

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