Pressure to overtake a slow truck on a blind crest
You are on a two-lane mountain road climbing steadily toward a crest. Ahead is a loaded truck moving at about 25 km/h. You have been stuck behind it for several minutes. The road has a solid centre line on the approach to the crest, but the line becomes broken about 80 metres ahead, just before the top. A passenger urges you to overtake now because the road looks clear. You can see perhaps 150 metres of road ahead before the crest cuts off the view. There is a light drizzle, and the road surface is damp. Oncoming traffic is occasional but not absent. Your car is a small hatchback with two passengers and luggage.
1. Is the broken line a signal that overtaking is safe here? Explain.
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No. A broken centre line permits overtaking only where it is safe, and it does not guarantee sight distance. The crest cuts off your view beyond about 150 metres, and oncoming traffic is occasional but present. At a closing speed of perhaps 90 km/h with the truck, 150 metres gives very little time to react if a vehicle appears over the crest. Damp roads lengthen braking distance. The correct reading is that the line change allows overtaking in principle, but the crest and weather mean it is not safe at this point.
2. How should you decide whether and where to overtake the truck?
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Assess sight distance, not just the line. You need a clear view well beyond the crest, enough gap in oncoming traffic, and enough power and road to complete the pass without forcing the truck or oncoming vehicles to slow. With a small, loaded hatchback, acceleration is limited, so the required gap is longer. Wait until you are over the crest and can see a long clear stretch, then signal, check mirrors and blind spot, and commit decisively. If in doubt, stay behind. The passenger's impatience is not a reason to take the risk.
3. What should you do about the passenger's urging and the following distance while you wait?
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Explain calmly that you will not overtake on a blind crest and that the delay is a safety decision, not indecision. Keep a following distance of at least two seconds in dry conditions and more in drizzle, so you have room to react if the truck brakes. Do not tailgate to look for a gap. Keep scanning the road ahead and the mirrors, and be ready to overtake only when the view and the gap are clearly sufficient. Managing passenger pressure is part of safe driving.