The San Francisco pedestrian volume modeling process refined the methodology used to develop previous intersection-based models and incorporated variables that were tailored to estimate walking activity in the local urban context. The methodology included two main steps. First, manual and...

Better data on pedestrian volumes are needed to improve the safety, comfort, and convenience of pedestrian movement. This requires more carefully-developed methodologies for counting pedestrians as well as improved methods of modeling pedestrian volumes. This paper describes the methodology used...

This dissertation addresses the question of how particular forms of metropolitan development affect travel patterns, a question long of concern to planners but recently the subject of a heated debate. Critics identify sprawling, low-density, single-use, automobile-dependent suburban development...

The question of how particular forms of metropolitan development affect travel patterns has long been of concern to planners but has recently been at the centre of a heated debate. Much of this debate has focused on the effects of suburbanization in particular, with some arguing that the...

A large number of heavy-duty trucks idle a significant amount. Heavy-duty line-haul truck engines idle about 20-40% of the time the engine is running, depending on season and operation. Drivers idle engines to power climate control devices (e.g., heaters and air conditioners) and sleeper...

Government-industry R&D partnerships can play an important role in advancing the public interest. A widely cited example is the Partnership for a New Generation of Vehicles (PNGV). It was launched in 1993 by the Clinton Administration and three US automakers, with the goal of advancing the...

Vehicle fleets are a poorly understood part of the economy. They are important, though, in that they purchase a large share of light-duty vehicles and are often targeted by governments as agents of change. We investigate fleet purchase behavior, using focus groups, interviews, and mail and...