Why do some of curviest, low dropoff parts of a road have no guardrail? And why are guardrails intermittent on roads?
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A guardrail is a hazard, since it is a stationary object very near to the highway edge. Engineers try to use other things like shoulders on the edge of highways, striping, delineators, and rumble strips. Some roads are just too narrow to have any of these. Traffic safety isn’t about how you “feel” (eg ‘this is scary’), it’s about fact (‘have cars actually left the road in this area, and will a piece of metal stop them? Yes? Let’s put one here.’).
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