It's a CalTrans issue and has been reported to them numerous times.

Thanks for reporting! This issue is not under the jurisdiction of Vallejo Public Works, and should be addressed by Caltrans. We have forwarded your issue to them. You can follow up with them by calling 916-654-2852. In the future, you can submit a Maintenance Service Request to Caltrans district 4 on their website at http://www.dot.ca.gov/dist4/d4address.htm. Thanks again for using SeeClickFix!