http://people.virginia.edu/~ggg9y/shafter.html

http://people.virginia.edu/~ggg9y/history.html

So, it seems there IS a Landvale Road mystery to this day. It must have been concurrent with the SN Sacramento Trestle at Broadway Terrace, but is not visible.

Wow.

http://www.eastbayhillsproject.org/completing-landvale-link-broadway-terrace-mystery-1936

You are certainly correct about the end of Landvale being obliterated by the new Highway 13 structures. But, it seems, a bit of history remains in the support structures to Highway 13 as it passes over Broadway Terrace.

It’s ironic that, as the 1936 Oakland map shows, the tiny road called Landvale (between Broadway Terrace and Pinewood) received a great expansion to become Landvale Road, only to be erased completely as a name only 30 years later. (with only the viaduct and the Highway 13 overpass support remaining).

http://teczno.com/old-oakland/

You can click on maps for 1877, 1912, 1936, 1950s and 1967 (plus modern) and zoom in with very good resolution. The nice thing is when you change years, the same spot appears as you were at, so it’s a great reference. The 1950s map showing Landvale is at this site.

From what you said about the “lost southern end” of Landvale, it’s pretty clear that Highway 13 absorbs it all the way from the pointy tip of Lake Temescal (easily noted via Google Earth overhead view) to Landvale’s end on the 1950s map, where Moraga bends at Thornhill, then and now; and is Moraga down past Montclair. But who knows, maybe there’s something hidden away in that messy interchange where 13, Moraga and Thornhill intersect?

Is it possible that Moraga, which has a “west lanes” facet on the north, here, and eastbound to the south, was only one set of lanes in the 1950s? I wonder if the curve you take from Moraga “westward” is actually a remaining bit of the end of Landvale, at least to the point where it’s directly under the freeway?

There’s a 14 page book ‘out there’ called:

Studies of the Landvale Road Extension and East Oakland Connection to the Low Level Tunnel Project (by Walter Nettleton Frickstad!!!)

it is noted via google, but no book to be found for sale

http://books.google.com/books/about/Studies_of_the_Landvale_Road_extension_a.html?id=eUaIGwAACAAJ

And, aside from the 1955 picture you mentioned showing the viaduct (there’s also a 1950s Road map showing it), I found this beautiful 1935 pic. I belive youi can see the construction of the Landvale viaduct in progress:

http://www.prah.net/hiller/highlands%201935.gif