In a recently released study, researchers in the UK have found that street-level plantings can reduce two of the dominant pollutants—particulate matter (PM10) and nitrogen dioxide (NO2)—by 60 and 40 percent, respectively, in urban street “canyons.” Previous city-scale studies had estimated that vegetation could only reduce levels of pollution by less than 5 percent.
A first-ever analysis of land-use and transportation demand in Arizona contradicts fears that compact, “smart growth” development, while beneficial in moderating demand, will increase localized congestion. The report, produced for Arizona DOT in March, also suggests that traditional travel demand modeling is outmoded, unable to reflect land use effects on demand, and it disputes notions that compact development is inequitable and costly.
The Demand Institute believes that a housing market recovery has begun, but this recovery will be different from previous ones because of new market conditions and expectations. These differences may impact transportation planning as commuting and non-work travel patterns change.
Roadway designers since the 1960’s have used the concept of “forgiving highways.” Due to its success in reducing fatal crashes on high speed access controlled roadways, engineers have been applying this methodology to urban streets in built up areas as well. However, this approach might actually make certain roads deadlier for motorists, as it encourages drivers to drive faster and less cautiously, and it has been shown to lessen pedestrian and bicyclist safety.
Case studies of cities which have removed elevated urban highways, as well as an examination of why urban highways should be removed. Download the full report.
A November, 2011 report from Washington, DC makes the case for why transit is important to the region, and imagines what it would look like without transit. The WMATA web site gives a brief overview, and the …
Cities are finding ways to connect neighborhoods and gain valuable urban space by building new types of bridges over freeways when they are reconstructed. The Chicago Tribune describes how some cities have created green space, …