>These three points affect anyone who lives near heavy automobile traffic. Just because it's an externality doesn't mean it doesn't exist! However, it occurs o

>These three points affect anyone who lives near heavy automobile traffic. Just because it's an externality doesn't mean it doesn't exist! However, it occurs over such a timespan that the immediate effects are a non-issue, just long-term. The average person does not take into serious consideration the 30+ year effect of a decision, but a more near-term one.