Against what skill? "Predict average travel times"? No, knowing that sort of information comes under "no self-respecting hero...". Sure, there'll be variables. But in the RW, I can tell you that I can make it to work in 15 minutes in perfect conditions, a few minutes longer if it's raining, and ten minutes longer if I get stuck behind a tractor. Heavy snow, add an hour or two. So today I'll be allowing 20 minutes. Now, where was the roll? I might make a roll *after* I set out, but that's nothing to do with the decision about when to stop reading email and leave the house.
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