It really depends on the structure of the suburb. If you are in a large planned suburb in some areas, it’s actually possible that driving out of your suburb takes 5-10m and you may need to get on the highway to get to the nearest supermarket. 40minutes is probably a rare one way scenario even with traffic but 25-30m is not out of the question. Haven’t you been in one of those kinds of suburbs? They were common in the Tier 2-3 city I grew up in in the South although I guess in the Northeast and West I haven’t seen it as often