Our research shows that under current urban conditions constraints imposed by family and life-style factors, perceptions of safety and convenience, and expectations about what means of everyday travel are normal severely restrict levels of walking for many people.
These results provide urban planners with constraints from the perspective of energy performance of a district.
The usual constraints on urban motion, whether enforced by physical barriers or legal convention, don't restrict him.
Conant hesitated at first, and then, an hour and a half later, reconsidered, after having reckoned with the constraints of urban portage: stoplights, crosswalks, potential thieves.
While the population of the world's cities will likely double in size between now and 2050, rising oil prices and carbon constraints make urban sprawl increasingly untenable.
The reasons range from tougher cost constraints to urban bureaucracy to the presence of a patchwork telecom infrastructure dating back to the 1970s and '80s.
With increasing pressures of a changing climate, urban growth and economic constraints, the need for wider spread integration is necessary in the interest of a sustainable future.
By organizing human influences in a spatially nested hierarchical patch mosaic structure, HPM-UEM models the complex spatiotemporal pattern of multiple environmental constraints on urban ecosystem functions.
The project itself was a major challenge for the implementers due to a novel and innovative subject thereof, including the construction of a railway line which takes place in a difficult terrain and within the constraints of urban planning.
