MUTCD Mileposts in California?

[oscar]

Or the 125/11/905 interchange, for that matter.  The roadway geometry on 905 isn't affected by whether the rest of the ramps to/from 125 and 11 have been built yet.

Another complicating factor is that 11 is being extended to a brand-new border crossing east of the existing 905 crossing. If Caltrans really gives a crap about a new Interstate designation (all evidence is that it doesn't, except maybe for 210), it would need to mull over whether a new Interstate should follow 11 rather than 905 to the border, or whether AASHTO/FHWA might raise that question. Yet another reason/excuse for Caltrans not to bother with the paperwork and expense of trying to change out the route markers.

[vdeane]

Having 905 take over 11 and 125 take over the rest of 905 would probably make more sense; this is definitely a case of numbers reflecting history more than current conditions.  That said, 11 being tolled would be a complicating factor, and in any case, it's not like 11 was around when 905 was finished.

[SeriesE]

Had there been enough foresight on the routing, the 905/11/125 interchange can be way less convoluted than the current one.