Terrain Obstacles and Hindrances

The movement point costs given above assume the best of conditions even in the worst of terrain. The mountains are assumed to be free of cliffs; the woods have no high-banked streams; rains haven't turned the plains to mud; the tundra hasn't been blanketed in snow. However, poor traveling conditions do occur, and when they do travel is slowed.
Table 75 lists common obstacles and situations that slow movement. The modifiers for these are listed as either additional movement point costs or multipliers.

When additional movement costs are listed, these are added to the cost of the surrounding terrain. Thus, crossing a ridge in the high mountains costs nine movement points for that mile instead of the normal eight.

Multipliers increase the movement cost by the amount listed. Snow, for example, doubles the cost of crossing the plains. Indeed, severe weather or torrential rainsócan actually bring all travel to a halt.

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