Slide (6 of 125)
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If we give the dozer operator a little training maybe he’d build the road like the lower drawing. We have the same truck, same hazard, same required stopping distance; but now the driver can see the hazard in time to stop. All he did was widen the vertical curve.
The same thing goes for curves (horizontal curves). We have to be able to see far enough ahead to be able to stop. This distance depends on the vehicle, its weight, and its speed. If we can't stop within our sight distance, we need to slow the vehicle down or reduce the weight so we can safely stop.
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