For tactical reasons, you will often want to move in draws or valleys because they give you cover. However, side slopes will force you to move slowly. If the map has a different contour interval, just adjust the arithmetic. For instance, with one contour line in 100 meters, a 20-meter interval would give a 20 percent slope. Know the Effects of Weather on Vehicle Movement .
Weather can halt mounted movement.
Cross-country vehicles may be restricted to road movement in heavy rain. If it has rained recently, adjust your route to avoid flooded or muddy areas. A mired vehicle only hinders combat capability. Prepare Before Movement. Locate the start point and finish point on the map.