How would you manage this traffic and tardiness issue?
Suppose you have to drive somewhere a few times a month. When there is no traffic, it takes 45 minutes. Usually there is traffic, and 95% of the time it takes an hour and a half or less. The last 5% of the time, it can take up to 3 hours.
Do you leave yourself 3 hours to get there every time? Suppose the event you’re going to is not life or death, but it will be very annoying and inconvenient for all involved if you are late.