Roseville Triangle
The Roseville Triangle is a term that I use to describe the triangle formed by the Union Pacific's Martinez, Sacramento, and Valley Subdivisions. The triangle serves to focus all trains that pass thru the Nothern California area for the Union Pacific and the BNSF between the PNW and Southern California.
Typically this area can experience over 100 train movements on all of the combined legs of the triangle. The Sacramento Sub is typically used by trains that by-pass the JR Davis yard complex and BNSF I-5 corridor trains, but this can and does change on an almost daily basis depending on crews avaiablility and whether sidings are full of road kill trains. The Martinez sub hosts trains to and from the Fresno Sub that need to run the Sac Sub north of Sacramento as well as trains that travel between JR Davis yard and the Bay area or the Freson sub to the south.
Since the triangle covers a broad area, I have put together a series of aerial maps that highlight the various features of the area.