From Salish Sea Wiki
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
- The Federal Highway Administration or FHWA passes federal funds through the Washington State Department of Transportation which in turn subsidizes Counties in their development of road-based transportation networks, including bridges and tunnels.
- The Federal Transit Administration or FTA provides a similar support for mass transit systems.