I know you have covered the perils and techniques of driving in the wet and in floods, but what single factor would you put at the top of the list when judging whether or not a flood crossing is safe?
Before and above anything else, judge how fast the water is flowing. Because if you get that wrong you could be in life-threatening peril. The depth of the water is important, of course, as is the condition of the road. But if you get those wrong the consequence is you stall or get stuck.
