ULTIMATE NORTHERN CALIFORNIA INTERSTATES

How could the extensive Interstate system be improved upon. Here are some ideas to make improvements to the interstate system. Below is a map with ideas for routes for future interstates in the western US. Click on a region below to view more detailed information about interstate ideas for that area

Click on a shaded region on the map below for more detail in a specific region. -Or- select a link below for a brief description of a designated route.

California Ultimate Interstates
 Area Map
 Interstate 1
 Interstate 701
 Interstate 901
 Interstate 9
 Interstate 109
 Interstate 509
 Interstate 909 Toll

Interstate 1 would upgrade a major pacific coast artery to Interstate standards from Washington state to Los Angeles. Not intended to replace the US 101 designation but instead be cosigned with US 101. In the Bay area US 101 would still be the primary route up the peninsula and into downtown San Francisco. where I-1 would replace current I-880 and the I-580 across the San Rafale bridge. Interstate 1 travel along the US 101 alignment north and south of the region. Because California does not allow duplicated route numbers SR-1 could be renumbered as SR A1A or 1A to avoid numbering confusion.

Interstate 701 would replace the existing SR 17 freeway that connects San Jose to Santa Cruz. This freeway would end at SR 1 in Santa Cruz

Interstate 901 would replace the existing SR 156 freeway in Prunedale and travel southward toward Monterey. it would be cosigned with SR-1 between Watsonville and Monterey ending in Monterey.

Interstate 109 would replace the existing SR 4 freeway that connects I-80 at Hercules to SR-99 (Future I-9) in Stockton. This highway passes thru Antioch and Concord along the way. This long spur freeway provides another vital interstate route number into the Bay Area and continuity with the I-9 system.

Interstate 9 would upgrade a major central valley artery to interstate standards from Red Bluff to the Mettler Wye south of Bakersfield. Interstate 9 would travel along the SR-99 alignment south of Sacramento. In downtown Sacramento the route would replace the northeast leg of Business route 80 (SR-51). The route continues cosigned with I-80 through Roseville, and then would turn north on State Route 65 towards Marysville. from there it continues to the SR-65 and SR-70 split meeting with future (I-509) and turns northward on a new bypass routing east of Marysville. The route then joins the SR-70 corridor through Oroville and then jumps over to the SR-99 corridor on SR-149. The route continues up SR 99 until it meets again with I-5 near Red Bluff.

Interstate 509 would travel north of sacramento from I-5 at the SR-99 split northward continuing in northbound SR-70 to the future I-9 corridor at the 65/70 split in Olivehurst.

Interstate 909 would be built partially as a toll facility between I-5 in Elk Grove and I-109 (SR-4) Antioch, and a free facility to the east and north around the Sacramento region. This highway would connect future I 109 (SR 4) with the Sacramento region I-9 (SR-99) US-50 and end at I-80 near Auburn. this Spur freeway provides another connection to the Sacramento region to alleviate traffic and a freeway bypass around the east and south of Sacramento to alleviate traffic on I-80, US-50 and I-5.