From the latest Friends of the Dominion Astrophysical Observatory newsletter:
[W]e are excited to report that the construction is almost done. The road just before the hairpin bend, whose repair was much needed, was scheduled for October. It has now been reinforced, rebuilt, and paved as of mid-February. The final piece, to replace the safety guardrails, should happen in March in time for our planned Open House on March 25th.