Greater speed is needed because of the desire to do larger and more complex problems, and greater accuracy is needed because, without it, there can be large errors in estimates of the impacts of plans and projects. The discussion below purposely limits technical detail so as to be accessible to a wide audience of users and managers, but there are numerous references that provide a full discussi...

Trip distribution is an important element of traffic impact analysis and is typically performed using expert judgment. Impacts are very sensitive to this step, and for large, mixed-use developments with many parcels, trip distribution can be very time consuming and potentially error prone. Regional trip distribution, on the other hand, is generally computed using a gravity model as part of a th...

There is a large gap between the aggregate, trip-based models used by transportation planning agencies and the activity-based, microsimulation methods being espoused by those at the forefront of research. The modeling environment presented here aims to bridge this gap by providing a palatable way for planning agencies to move towards advanced methods. Three components to bridging the gap are em...

Estimating the emission consequences of surface transportation operations is a complex process. Decision makers need to quantify the air quality impacts of transportation improvements aimed at reducing congestion on the surface street network. This often requires the coupling of transportation and emission models in ways that are sometimes incompatible. For example, most macroscopic transportat...

Abstract Objectives Traffic management is challenging during construction because of the effects traffic congestion, travel time, delay, and queue length. Long-term work zones on urban roads lead to many problems such as speed, inconvenience, economic losses drivers, which are focused in previous studies. Methods Moreover, due zone (CWZ), impact environmental factors air quality noise levels wa...

There is great interest in developing pricing models for congestion relief. However, most of the work in the literature uses static transportation models for analysis. The benefits of accounting for traffic dynamics under congestion pricing are unclear. This research performs a systematic comparison of static traffic assignment with the VISTA model, a simulation-based dynamic traffic assignment...

Accessibility to goods and services is a complex notion which completely pervades territorial issues. Some aspects of accessibility are related to physical features and could be expressed using measurement units. Others are related to preferences that depend on values shared among people belonging to various social groups. These values are related to their specific constraints including economi...