I'm not sure how to give/get update info for the digital maps. I noticed on the Route 66 map 6 it shows leaving Cajon Rd and going through Devore. The recent construction has reconnected Cajon Rd so you don't have to climb the hill into Devore. Cajon Rd now continues under the freeway.
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I'll put this information in the hopper. We're in the midst of finishing up the Chicago to NYC route maps at the moment. We'll get to updating the addenda as soon as they are complete.
EDIT: Actually, I just checked the addenda. I think it's in there now:
(Dec 2016) Cajon Blvd is now continuous between Kenwood Ave. on the west and Devore Rd./Glen Helen Pkwy. on the east, it is no longer necessary to turn at (B) and [D].
The digital data will be updated with this information when we have compiled enough changes to justify an update.