Transportation impacts

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Transportation systems are fundemental to our development of ecosystems. Transportation networks have both direct and indirect impacts. This is a high level topic page

Notes on direct impacts

  • USGS research has described PAH release from road sealants, with coal-tar sealants having 1000 times the release.
  • Copper in brake pads can be found in highway runoff at levels that affect aquatic life.

Notes on indirect impacts

  • Transportation networks can capture and accelerate delivery of storm runoff into streams and rivers.
  • Transportation networks enable residential and urban development, which reduces forest cover, increase impervious surfaces and ultimately leads to degradation of aquatic ecosystems.

Notes on Transportation Network Management