Current Research


 Multimodal Trip Generation

Despite evidence that a more compact urban form, access to transit and a greater mix of uses generates fewer and shorter vehicle trips, local governments are often compelled to use current ITE trip generation rates to evaluate transportation impacts and calculate transportation system development charges (TSDCs). This ongoing line of research proposes to develop multi-modal trip generation rates and methods that better reflect the relationship between land use, transportation and travel demand for specific land use types located in various urban settings. The research theme aims to: a) improve the methods to collect and disseminate local data (using multi-modal counts and establishment surveys), b) develop methodologies to estimate multimodal (or person) trip generation rates that are sensitive to demographic, land use and transportation contexts, and c) understand the links between various policy levers and travel behavior.

To this end, we have engaged in a variety of projects to advance this research agenda. Links can be found below:

Development of non-motorized planning tools

Bicycle and pedestrian research has made important gains as communities are increasingly interested multi-modal planning to create communities that are accessible, safe, livable, environmentally sensitive, healthy and economically vibrant. But the methods to support these efforts are lacking and less sophisticated than those available for motorized modes. To help remedy this issue, our ongoing research agenda aims to advance pedestrian modeling tools and increase the capacity for public agencies, planners and researchers to estimate various aspects of pedestrian demand.

To date, we have completed or are engaged in several research projects to advance pedestrian modeling capacity:

Travel Behavior Theory

Travel behavior theory tends to an accumulation of theories and methods from a variety of disciplines, including economics, geography, planning, psychology, health, and urban design. In the last several years I have participated in a number of efforts to think more carefully about frameworks and theories that explain complex activity and travel behavior.

Consumer Behavior & Travel Choices

This study aims to marry travel behavior with consumer behavior to better understand the relationship between modes of access and local business districts. Here we aim to understand the correlates with access mode, the built environment, establishment characteristics, and consumer purchases with an emphasis on understanding how cyclists differ from other user groups. This study is sponsored by OTREC, City of Portland, Bikes Belong, and Travel Oregon. This study is ongoing through Summer 2012.

Linking Residential Location and Transport Choices

Daily travel decisions, vehicle ownership, employment location are closely tied to where we choose to live. This thread of research aims to understand how individual socio-economics, preferences, previous experiences, and satisfaction influence and interact with residential and travel choices.