Photos of railroad workers replacing a Muni light rail track section on Duboce street, Church street and Market street (San Francisco).
Each section of track work, such as replacement of the double diamond crossing structure at Church st and Market st, takes 2 or 3 days with crews working 24h during week-ends.
The work was realized by local contractor NTK Construction.
I must thank NTK management and crew for letting me shoot those amazing photos on their construction site.