A major attraction of the popular and influential planning movements known as 'the new urbanism', 'transit-oriented development', and 'neotraditional planning' are their presumed transportation benefits. Though the architects and planners promoting these ideas are usually careful to emphasize the many ingredients necessary to obtain desired results -- the straightening of streets to open the local network, the 'calming' of traffic, the better integration of land uses and densities, and so on -- a growing literature and number of plans feature virtually any combination of these elements as axiomatic improvements.

The potential problem is that the traffic impacts of the new plans are generally indeterminate, and it is unclear designers understand the reasons well enough to avoid unintended results. This paper proposes a simple behavioral model to identify and assess the tradeoffs these ideas impose on transportation and subdivision planners.

The preservation and promotion of rich urban environments demands more than logical and functional understandings alone. Although these types of understanding are important to the life of vital cities, what is often overlooked in these views is the role that the incomplete, the messy, and the complex play in constituting the wholeness and viscerality of real urbanity. Aided by perspectives from philosophy and film this article promotes the “residual” aspects of the urban experience and suggests why these aspects might be of even greater importance than more controlled elements of urban life to the continuation of thick, whole, urban settings.

After describing the current emission modeling regime, the paper identifies and discusses the major problems with the existing emission modeling approaches. The current short-term modeling improvement programs of the US Environmental Protection Agency and the California Air Resources Board are discussed. The paper then outlines the three long-term modeling improvement approaches that are currently being investigated by regulatory agencies: a multiple-cycle method, an engine map approach, and a modal modeling technique. Finally, the vehicle activity and emission rate data needs for each modeling approach (both for model development and implementation) are described.

We investigate the discretized version of the compact Randall-Sundrum model. By studying the mass eigenstates of the lattice theory, we demonstrate that for warped space, unlike for flat space, the strong coupling scale does not depend on the IR scale and lattice size. However, strong coupling does prevent us from taking the continuum limit of the lattice theory. Nonetheless, the lattice theory works in the manifestly holographic regime and successfully reproduces the most significant features of the warped theory. It is even in some respects better than the KK theory, which must be carefully regulated to obtain the correct physical results. Because it is easier to construct lattice theories than to find exact solutions to GR, we expect lattice gravity to be a useful tool for exploring field theory in curved space.