All Research Products

The National Center for Sustainable Transportation's primary output from research is reports and white papers. Each project is also required to produce a Project Brief to summarize and highlight the policy and/or research findings and implications. NCST research also produces journal articles, conference papers, books, dissertations, theses, presentations, and posters. The NCST has also created various tools that can be used by policymakers and practitioners, such as models, calculators, and planning tools.

Discontinuance Among California’s Electric Vehicle Buyers: Why are Some Consumers Abandoning Electric Vehicles?

Research Product Type
Research Report
Discontinuance, the act of abandoning a new technology after once being an adopter, has implications for market growth and could prevent electric vehicles from ever reaching 100% market share. Using results from five surveys of electric vehicle owners, the researchers examine discontinuance among battery electric and plug-in hybrid electric vehicle adopters.

Why are Some California Consumers Abandoning Electric Vehicle Ownership?

Research Product Type
Policy Brief
This policy brief summarizes findings from research that surveyed California PEV buyers 2–7 years after they first purchased their EV to understand whether they have continued to choose PEVs with subsequent purchases, and if not, what factors may have led to their discontinuance of the technology.

The Sustainability of Alternative Last-Mile Delivery Strategies

Research Product Type
Policy Brief
This policy brief summarizes findings and policy implications from UC Davis research that developed models for e-commerce demand, last-mile delivery operations, and cost and sustainability assessment, then applied this modeling framework to a case study in Southern California to evaluate the potential impact of these strategies under different delivery scenarios

Can Complete Streets Deliver on Sustainability?

Research Product Type
Policy Brief
This policy brief summarizes findings from UC Davis research that used life cycle assessment, a modeling tool for evaluating a product or activity’s environmental impacts through all stages of its life, to quantify the environmental performance of complete streets.

Setting TNC Policies to Increase Sustainability

Research Product Type
White Paper
This research aims to assess the goals and effectiveness of the fees and taxes on transportation network company (TNC) platforms in achieving some of policy objectives, such as traffic and emissions mitigation, as well as revenue generation.

Congestion Reduction via Personalized Incentives

Research Product Type
Research Report
With rapid population growth and urban development, traffic congestion has become an inescapable issue, especially in large cities. Many congestion reduction strategies have been proposed in the past, ranging from roadway extension to transportation demand management programs. In particular, congestion pricing schemes have been used as negative reinforcements for traffic control. This project studies a different approach of offering positive incentives to drivers to take alternative routes.

Longitudinal Analysis of COVID-19 Impacts on Mobility: An Early Snapshot of the Emerging Changes in Travel Behavior

Research Product Type
Associated Publication
The research team found substantial shifts from physical commutes to teleworking, more adoption of e-14 shopping and home delivery services, more frequent trips by walking and biking for leisure purposes, and 15 changes in ride-hailing use. Also, the research team discusses implications of these findings from the perspectives of 16 environmental sustainability and social equity. This study concludes with suggestions of directions for 17 effective policy and future research.