Looking for traffic, roadway conditions, and detours? Use the link below: Current Roadway Conditions and Detours I-5 between Santa Clarita and the San Joaquin Valley is commonly referred to as “The Grapevine” by locals and traffic reporters. Most assume the name derives from the twisty nature of the original roadway – the Ridge Route. That …
As a way to keep track of the immense amount of data regarding old highways, I created highway logs to store the data. They were originally designed after 1940’s state highway logs from the Division of Highways. I have made them available on this website on my Site Documents page. The logs for US 6 and US 99 have recently been updated and have been uploaded.
Completed in 1876, this loop still stands as an engineering marvel and a unique way of keeping the grade steady while climbing over the Tehachapi Mountains between Bakersfield and Mojave.
The Historic American Engineering Record, a part of the National Park Service, produced a very detailed poster for identification of truss bridges. While these bridges aren’t as common in southern California, they still get plenty of use. Railroads are the most common user of these types of bridges, specifically the Pratt Truss.
Well, that was strong! I felt it here in San Diego. First time I felt my building sway and it shook for a while. USGS is now reporting the quake as a Mw 7.1, which is 11 times larger than the one yesterday. This, assuming a larger one doesn’t happen, has also been deemed the …
Southern California Regional Rocks and Roads
Exploring the highways, geology, history and landscapes of Southern California.