For those wondering what that mess is all about on Cesar Chavez Boulevard in San Francisco, here is the lowdown: They are in the process of replacing a giant 8 feet diameter sewer pipe that runs under the whole length of Cesar Chavez Blvd, from Guerrero Street to the 101 freeway, and also under Valencia Street between Chavez and Mission St (where the Burger King is) as well as under several adjacent streets. So what we see right now around Harrison Street is just the beginning! Once they are done with the underground work, Cesar Chavez blvd will be redesigned, with an addition of bike lanes and a median, plus trees on both sides.