Construction work has forced the closure of Fremont Street between Howard and Mission Streets. It will remain closed until the Tuesday morning commute.
Crews are making progress with the excavation of the underground rail level of the new transit center.
They're also installing a temporary bridge to help keep traffic moving while they dig.
Download the ABC7 News Waze app to help you navigate around all the detours this weekend. To find it go to: http://abclocal.go.com/kgo/feature?section=resources/traffic&id=8474164