There is strong correlation between elevated atmospheric manganese concentrations and automobile traffic density.
Environmental lead concentrations are particularly high in cities in the Northeast, such as Newark, New Jersey, because of their history of high automobile traffic densities and the relatively old age of much of the housing.
And while building more roads may solve the problme of congestion in the near-term, he said, it could actually increase density and automobile dependence.
New York City's obvious urban antithesis, in terms of density and automobile use, is metropolitan Los Angeles, whose metastatic outward growth has been virtually unimpeded by the lay of the land, whose early settlers came to the area partly out of a desire to create space between themselves and others, and whose main development began late enough to be shaped by the needs of cars.
Pb contents high in impaired sites group can be related to urban runoff, traffic density, and automobile washing which is common along stream banks.
The village's transportation system includes highways, streets and a rail line; its low population density favors automobiles.
Highlighting the risks and rewards of regional collaboration in municipal governance, Goetz and Boschmann recount public works projects such as the construction of the Denver International Airport and explore the smart growth movement that shifted development from postwar low-density, automobile-based, suburban and exurban sprawl to higher-density, mixed use, transit-oriented urban centers.
As Wolfgang Sachs, a German environmental scientist, points out in his book "For the Love of the Automobile," "Once a certain traffic density is surpassed, every driver contributes involuntarily to the slowing of traffic.
Another limitation of the TAZ approach is that the traffic density estimates encompass automobiles and trucks but not buses, which may be a significant contributor to the overall pollution load in certain areas (Levy et al. 2001).
Secondary suites, however, present a challenge to the automobile's supremacy: they increase housing density, and ease the push to expand ever further into the suburbs.
