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RDLEN - Total road length by class Total road length by class was calculated by summing the length
of all road classes in the 1 km grid cell reporting unit. Values
are reported in meters. The three road classes included were interstates,
highways, and surface streets. Roads increase imperviousness, potentially
decreasing water quality. Roads also fragment habitat and may act
as barriers, especially to large mammals. Wider roads and higher
traffic volumes will generally have more adverse affects, and impact
a larger surrounding area then smaller, less traveled roads. |