[burzum]

Here is the apparent location

http://maps.google.com/?ie=UTF8&ll=34.336101,-118.507719&spn=0.007814,0.020084&t=h&z=16&om=1

[BurbankKarl]

if you move up a little, where it says The Old Road, you can see a line that moves UNDER I-5 from left to right...that is the truck tunnel.

If you zoom in, you can see trucks using it, heading southbound. it has less of a grade than I-5