Interstate 205 California
Interstate 205 is a short, well traveled freeway providing regional connectivity between the Central Valley of California and the San Francisco Bay Area. Running across the north side of Tracy, I-205 connects with I-5 north through Lathrop and SR 120 east to Manteca. West of Tracey at the Alameda County line, Interstate 205 links with I-580, the main route from the heart of the Central Valley into the Bay Area.
Although it bypasses Tracy, a growing bedroom community and transportation hub to south, Interstate 205 comprises a commuter route with six overall lanes. The freeway primarily channels traffic to the Bay Area via Interstate 580 and Altamont Pass from Stockton to the north, Manteca, Oakdale and Sonora to the east and Modesto, Turlock and Merced to the southeast.
Interstate 205 closely parallels old U.S. 50, which was decommissioned in 1964. U.S. 50 was upgraded to a freeway across Tracy during the early 1950s. Despite the highway predating the Interstate Highway System, Interstate 205 is considered an original 1956 Interstate Highway.1 Portions of the U.S. 50 freeway were eventually incorporated into Business Loop I-205, which follows old U.S. 50 through Tracy along 11th Street.
East End – Lathrop, CA
West End – Mountain House, CA
Mileage – 12.97
Cities – Tracy
- Junctions –
Source: December 31, 2018 Interstate Route Log and Finders List
I-205 Annual Average Daily Traffic (AADT)
Source: 2017 Traffic Volumes – Caltrans Traffic Census Program
Interstate 205 was possibly designated as a branch of I-5 because it was originally to connect with Interstate 5W. Interstate 5W was renumbered as part of I-580 in 1964.
Due to its role as a commuter route, the eastern end of Interstate 205 was widened from four to six lanes in 2007/08. I-205 expansion followed the four-laning of the SR 120 freeway across Manteca, which accounted for the increase in traffic demands.
East End – Lathrop, California
West End – Mountain House, California
Interstate 205 eastbound leads travelers to Modesto via SR 120 in addition to Stockton and Manteca. Since leaving Oakland, I-580 has followed the original route of the Lincoln Highway. I-205 overlays Historic U.S. 50 east to Tracy while I-580 converges with Interstate 5 (Westside Highway) near Vernalis. Photo taken 07/11/18.