Like many have said before, their isn't anything wrong with the Malahat Road itself, it's the driver's that cause the accidents.
And SPEED is usually the official outcome released by the police after a malahat crash as the main contributor to the crash.
Just for fun, on a slow weekday in middle of the week I decided to make a video of just how many driver's I could capture on my Dash Cam speeding in the 60km/hour construction zone (which is currently about 5 or 6 km long, if not longer) I got a total of 20 speeders in that one stretch alone. I put my cruise control on to exactly 60km/Hour to accurately capture the speeders.
If you get caught by the police the fine is DOUBLE in a construction zone, and construction work zones are in effect 24 hours a day/7 days a week, unless otherwise posted. Unfortunately I was not surprised at how many drivers were willing to take that risk.