Most of the photos on this site were extracted from reference images (high-resolution tiffs, 20 to 200 megabytes in size) from the Library of Congress research archive. (To query the database click here.) Many were digitized by LOC contractors using a Sinar studio back. They are adjusted by your webmaster for contrast and color in Photoshop before being downsized and turned into the jpegs you see here.
Vintage photos of:
Three years after the first Botts dots were installed on a California highway, I took this Kodachrome going south on US 101 at the Alto interchange in Marin County, California. This was when it was still a full cloverleaf, with its hair-raisingly overlapping entry and exit lanes below the overpass. Off to the left, Belvedere and Tiburon; to the right, Mill Valley. Again, this is the era of Volkswagen Beetle ubiquity: there are at least three visible here, one in its favorite habitat, the fast lane. View full size.