Gribblenation

I-280 as a freeway spans 59 miles from US 101/I-680 in San Jose northeast to King Street in San Francisco.  I-280 serves largely as a bypass route of most of the major cities around the San Francisco Peninsula and an alternate to US 101 on the Bayshore Freeway.  Daily traffic counts on I-280 range from 11,000 vehicles to over 200,000. CAhighways.org on I-280 Much of the finalized planning of the Interstate Highway System in the San Francisco Bay Area was largely plotted out by 1956.  Between CA 17 in Los Gatos and CA 1 in San Francisco the path of I-280 ultimately followed Legislative Route Number 239 which was designated by the State Legislature in 1957. CAhighways.org on LRN 239 LRN 239 can be seen appearing on the State Highway Map City Insert of San Francisco connecting to CA 1 by 1958. 1958 State Highway Map City Insert I-280 was to take a far different route than it currently does in San Francisco.  The original plan for I-280 was to follow CA 1...