policy brief

Falling Ridership Trends in Southern California

research report

Falling Transit Ridership: California and Southern California

Abstract

In the last ten years transit use in Southern California has fallen significantly. This report investigates falling transit use. We define Southern California as the six counties that participate in the Southern California Association of Governments (SCAG) – Los Angeles, Orange, Riverside, San Bernardino, Ventura and Imperial. We examine patterns of transit service and patronage over time and across the region and consider an array of explanations for falling transit use: declining transit service levels, eroding transit service quality, rising fares, falling fuel prices, the growth of Lyft and Uber, the migration of frequent transit users to outlying neighborhoods with less transit service, and rising vehicle ownership. While all of these factors probably play some role, we conclude that the most significant factor is increased motor vehicle access, particularly among low-income households that have traditionally supplied the region with its most frequent and reliable transit users.

research report

Shared Mobility Policy Briefs: Definitions, Impacts, and Recommendations

Abstract

In 2017, researchers from UC Berkeley’s Transportation Sustainability Research Center and the Institute of Transportation Studies produced eight policy briefs on shared mobility. Shared mobility – the shared use of a vehicle, bicycle, or other travel mode – services are experiencing rapid growth and expansion. This is, in part, due to the launch of innovative business models across California, and their use of the smartphone as a way to enable on-demand transportation options. There is a need to clarify emerging terms and best practices for policymakers amidst the fast-paced developments of the field. Fluency in data-sharing opportunities and standards, funding options, and equity considerations will be needed to implement flexible, forward-thinking policies. These topics are covered in the briefs that follow. Each brief includes a presentation of research findings, a description of the research approach, and recommendations for the California Legislature. Policymakers and legislatures can refer to these briefs for digestible explanations of research findings and suggestions of ways to apply research to improve California’s transportation system

research report

The Potential for Shared Use Mobility in Affordable Housing Complexes in Rural California

Abstract

There is very little research on the unmet needs of transportation alternatives for low-income households in California. A survey of low-income residents at affordable housing complexes in the San Joaquin Valley of California was conducted to explore unmet transportation needs, willingness to use shared mobility services, and the potential to reduce household vehicles and parking spaces. The survey also examined awareness of public financial incentive programs aimed at reducing vehicle emissions in the Valley. The analysis of the survey results suggests the following conclusions: survey respondents successfully marshal their limited transportation resources to travel to activities that are essential to the current or future economic well-being of their households; respondents indicate a strong willingness to use ride-sourcing and carsharing services located at their affordable housing complex; analysis of the use of respondents’ current vehicles and stated willingness to use ride-sourcing and carsharing services suggests some potential to reduce parking in the affordable housing complexes; barriers to paying for carsharing and ride-sourcing services include lack of credit cards and bank accounts; carsharing and ridesharing programs in these communities should include a call center with staff who speaks both English and Spanish; and survey respondents lack knowledge about public incentive programs that seek to reduce vehicle emissions in the San Joaquin Valley.

research report

Exploring the Costs of Electrification for California’s Transit Agencies

Abstract

The California Air Resources Board is considering regulatory changes to require an increasing share of public transit buses to produce zero emissions by 2040. This report attempts to identify and assess critical drivers of electric bus adoption costs, characterize uncertainty in forecasting agency transition costs, and provide an approach to support agencies’ assessment of strategic investments in new vehicle technologies. While current purchase costs for electric buses are 40% higher compared to conventional diesel or clean-natural gas buses, by 2030, electric buses are likely to become the most cost-effective option. Taking total cost of ownership into consideration, replacing a bus fleet by 2030 with a 100% electric fleet is estimated to decrease overall costs by $0.1 to $3.6B compared to replacing the current fleet. Results are likely to vary depending on agency size as small and rural agencies have orders of magnitude smaller fleets than the largest agencies and the estimates take into account current subsidies for purchases of electric buses. The report concludes that total costs of ownership for electric buses are likely to be lower than current fleets and that agencies need better tools to be able to evaluate integrated technology and systems planning, particularly as it relates to transit bus electrification.

research report

State-Level Strategies for Reducing Vehicle Miles of Travel

Publication Date

September 1, 2017

Author(s)

Michelle Byars, Susan Handy, Yishu Wei

Abstract

California adopted a statewide target of reducing greenhouse gas emissions to 40% below 1990 levels by 2030. To meet these goals, the state must achieve a 15 percent reduction in total travel by light-duty vehicles by 2050 compared to expected levels. Under current state policies, reductions of this magnitude are likely. This report explores the evidence for strategies to reduce vehicle miles of travel in pricing, infill development, transportation investments, and travel demand management programs. For each category, the report outlines programs from other states that, if adopted, have the potential to reduce (vehicle miles traveled) VMT and thus greenhouse gas emissions.

research report

PRSM Review Year 1 Report A: Review of PRSM Use at Caltrans

Publication Date

September 1, 2017

Author(s)

Iris Tommelein, Nigel Blampied

Abstract

The California Budget Act of 2016 included a provision to “complete a post-implementation review of the Project Resourcing and Schedule Management (PRSM) information technology system upgrade completed by the Department of Transportation.” The PRSM system referenced is Commercial-Off-The-Shelf (COTS) software deployed at Caltrans in 2014 and intended to enable Caltrans to effectively plan State employee and consultant time spent on activities related to projects in its Capital Outlay Support (COS) program. In this Part A report, the researchers studied PRSM as implemented and in practical use, based on a Caltrans document review and interviews conducted with sample groups of Caltrans staff. The result is this factual, non-judgmental description of how PRSM is used and what it is used for. The researchers’ initial sense from the PRSM review meetings is that over the course of three years of deployment, PRSM has become a well-established project management system for approximately 3,000 Caltrans users with read/write access and many others with read-only access, yet PRSM is not yet fully living up to its title. While PRSM is an acronym for “Project Resourcing and Schedule Management,” Caltrans is only using it for project resourcing, especially for annual budgeting, and is not using PRSM’s scheduling functions to their potential.

research report

Sustainable Transportation Terms: A Glossary

Publication Date

September 1, 2017

Author(s)

Albee Weist, Michelle Byars, Susan Handy

Areas of Expertise

Abstract

One of the challenges in developing a consensus around the goal of sustainable transportation is a lack of consensus around the terms used to define and describe sustainable transportation. The goal in this project was to assemble a list of relevant terms and provide clear and simple definitions. Because it is not uncommon to find multiple terms used to refer to the same concept, the report also aims to differentiate the preferred terms from less preferred terms and terms that should not be used for various reasons. Terms were identified based on a review of documents from transportation agencies, websites and publications from transportation organizations, and papers published by the academic community, and the list in consultation with Ellen Greenberg, Deputy Director of Sustainability at the California Department of Transportation (Caltrans). Terms are grouped into categories based on purpose, mode, destinations, community type, and others. The intent of this work is to create a useful resource for those working to advance sustainable transportation

research report

New Methods for Monitoring Spatial Truck Travel Patterns in California Using Existing Detector Infrastructure

Publication Date

August 1, 2017

Author(s)

Abstract

This study developed a methodology to accurately estimate network-wide truck flows by leveraging existing point detection infrastructure, namely inductive loop detectors. The tracking model identifies individual trucks at detector locations using advanced inductive signatures and matches vehicle pairs at detector locations, using an extended form of the Bayesian classification model to estimate matching and non-matching probabilities of the vehicle pairs Several vehicle feature selection and weighting methods including Self Organizing Map and K-means clustering were applied to better identify individual vehicles from signature data. It was shown that the proposed extensive feature processing enhanced vehicle identification performance even among vehicle pools sharing similar physical configurations. The developed model was tested along an approximately 5.5-mile freeway segment on I-5 and CA-78 in San Diego, California where only 67 percent of the total trucks were observed at both up- and down-stream detector sites. Results showed balanced performances in exactness and completeness of matching with 91 percent of correct outcomes for multi-unit trucks