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    This particular mine used a left-hand traffic pattern which, in this case, properly placed the empty trucks on the outside edge, the weaker part of the road. Left-hand traffic does have the general advantage of placing operator’s cabs on opposite sides of the road for oncoming traffic. If there were a head-on collision or a sideswipe, you wouldn’t have operator’s cab hitting operator’s cab.
Any time you put a curve in a haul road, you must make the curve wider than the straight stretch, because the back wheels don’t follow the front wheels around a curve. The back wheels cut the angle to a certain extent. A curve needs to be wider than a straight stretch of the road to provide adequate side clearance.
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