I don't know North American stats, but I'd have to guess they'd be similar, if not worse.
Quote:
“Road traffic in Great Britain has grown by 84% since 1980“
That is a LOT of traffic, nearly double in under 30 years. It does add credence to the commonly held view“Weren’t the roads much quieter when we were kids?”
Absolutely, and there is the proof - half as much traffic when we were young and the population increase doesn’t justify that increase in road traffic. The dramatic increase in traffic is due to the fact that motoring costs have remained fairly stable during the last 30 years and disposable income has increased. Also more women are driving than ever before.
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Road Traffic up 84%
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On top of it all, denser traffic means less lattitude for hypermiling techniques.