Typically barriers are placed to leave a shoulder (might be narrower than normal, but usually SOMETHING is left). If any of the barricades are over the line without having obtained the appropriate permits from Caltrans, the G.C. is f*cked and will possibly be nailed for gross negligance. Either way, the lawyers are going to have a field day with this one.
Side note, since we're talking about riding safety - even when there IS a shoulder, anytime you have k-rails present at the edge of the road, they just become "junk collectors" and a shoulder strewn with debris can be as big a hazard as anything else. Anyone that rides CA roads with any regularity knows there is WAY too much trash, debris, etc. on the roadsides that never gets picked up. Not to mention the "junk barges" that roll around with crap literally falling out of the back (no tarp, no cover, etc.) It's all too common.