The Changing Spatial Location of Low-Wage Work and Workers in California: Implications for Transit Ridership

Ridership at many transit agencies in California is declining. One issue raised in Falling Transit Ridership, but only lightly explored, is the changing spatial location of low-wage work and workers in California, and the implications of these changes for commuting and transit use. Transit commuting is highest in dense urban neighborhoods where residents live reasonably close to employment opportunities. However, low-income households and low-wage employment has suburbanized over time (Kneebone 2009; Kneebone, 2017) making it increasingly difficult for workers to commute by transit. Drawing on data from the Longitudinal Employer-Household Dynamics (LEHD) program the project will quantify changes in the spatial location of employment and workers from 2002 to 2015 in the five major California metropolitan areas. In particular, the analysis will include (a) the extent to which jobs and workers have decentralized over time by wage group (low, medium, high) (b) the changing location of workers and employment relative to transit-friendly neighborhoods and transit supply. The second part of the analysis examines whether rising rents in some regions of the state are pushing workers to live further from their workplaces over time.

By |2025-04-03T23:06:32-07:00April 3rd, 2025|

Infrastructure-to-Vehicle Communications for Autonomous Vehicle Systems

Researchers have been developing innovative methods for integrated traffic management and communications networking systems for autonomous transportation systems. These models provide for optimal on-ramp merging and adaptive formation of vehicular flows across highway lanes, with the goal of achieving high vehicular flow rates while reducing queueing delays. To effectively control vehicular flows and formations across the highway, researchers have developed new data communications protocols and algorithms.The research team proposes to translate its models and techniques to the design of autonomous transportation systems when aided by interconnected roadside unit (RSU) stations that form a backbone network infrastructure. The research team’s methods will be used to determine the best configuration of joint traffic management and data networking mechanisms, described by the locations and interconnection features of the RSU stations and the backbone network infrastructure that they form.

By |2025-04-03T23:06:34-07:00April 3rd, 2025|

SB1 Sec 48(a) ZEV Finance Research with ITS Davis

As the market share of zero-emissions hydrogen and electric vehicles increases in California, the motor vehicle fuel tax becomes less applicable as a user fee, and declining revenues could produce shortfalls for maintaining the transportation system. The authors of SB1 sought policy options to raise usage-based revenues from electric and zero-emissions transportation system users.This research was specified in SB1 as a study for the University of California at Davis. Professor Martin Wachs, an internationally-renowned transportation finance expert member of the SB 1077 Road User Charge Technical Advisory Committee, is assisting research at UC Davis with this study.

By |2025-04-03T23:06:34-07:00April 3rd, 2025|

What’s Behind Recent Transit Ridership Trends in the Bay Area?

Public transit ridership has been falling nationally and in California since 2014. The San Francisco Bay Area, with the state’s highest rates of transit use, had until recently resisted those trends, especially compared to Greater Los Angeles. However, in 2017 and 2018 the region lost over five percent (>27 million) of its annual riders, despite a booming economy and service increases. This report examines Bay Area transit ridership to understand the dimensions of changing transit use, its possible causes, and potential solutions. We find that: 1) the steepest ridership losses have come on buses, at off-peak times, on weekends, in non-commute directions, on outlying lines, and on operators that do not serve the region’s core employment clusters; 2) transit trips in the region are increasingly commute-focused, particularly into and out of downtown San Francisco; 3) transit commuters are increasingly non-traditional transit users, such as those with higher incomes and automobile access; 4) the growing job-housing imbalance in the Bay Area is related to rising housing costs and likely depressing transit ridership as more residents live in less transit-friendly parts of the region; and 5) ridehail is substituting for some transit trips, particularly in the off-peak. Arresting falling transit use will likely require action both by transit operators (to address peak capacity constraints; improve off-peak service; ease fare payments; adopt fare structures that attract off-peak riders; and better integrate transit with new mobility options) and public policymakers in other realms (to better meter and manage private vehicle use and to increase the supply and affordability of housing near job centers).

By |2025-04-03T23:06:31-07:00April 3rd, 2025|

Dynamic Optimization and Network Analysis for Bus Transportation for the Los Angeles Unified School District

Every regular school day, LAUSD operates over 14,000 hours of service using 1,307 school buses to serve over 38,000 students, who attend more than 300 schools in more than 30 subdistricts, on 1,669 routes over a service area of about 750 square miles. Bus contractors own and operate another 700 school buses to provide service for LAUSD. LAUSD also provides service for midday, athletic events, after-school programs, and on weekends. The buses are subject to traffic conditions — operating both during peak traffic times and during non-peak traffic times — and to changing enrollment patterns. LA’s very large geographic area, as compared to other US cities, makes the problem particularly acute (and also scientifically interesting).The project team seeks to help the Student Transportation Operation of the LAUSD better match its capacity with demand. Specifically, UCLA seeks to answer the following stakeholder question: What is the best way to operate their bus service within regulatory and policy guidelines?

By |2025-04-03T23:06:32-07:00April 3rd, 2025|

Promises and Projects: Examining the Accountability and Flexibility of LOST Expenditure Plans

Local Option Sales Taxes (LOSTs) are a popular form of local transportation finance in California. Researchers partially attribute the success of LOSTs to the inclusion of expenditure plans that outline specific projects and services to be delivered using measure revenue over the 20 or more years the measure will be in place. Expenditure plans are commitments on the part of sponsoring transportation agencies, but issues of accountability might compromise these commitments and we are not aware of any prior research into the tension between commitments to projects and commitments to accountability that are both included in LOSTs.This research will examine how well expenditure plans presented in measures reflect actual project delivery over the life of the sales tax.

By |2025-04-03T23:06:32-07:00April 3rd, 2025|

Transit Blues in the Golden State

From 2014 to 2018, California lost more than 165 million annual boardings, a drop of over 11%. This project examines public transit in California in the 2010s and the factors behind its falling ridership. Transit ridership has been on a longer-term decline in regions like Greater Los Angeles and on buses, while ridership losses in the Bay Area are more recent. While overall transit boardings across the state are down since 2014, worrisome underlying trends date back earlier as patronage failed to keep up with population growth. But reduced transit service is not responsible for ridership losses, as falling transit ridership occurred at the same time as operators instead increased their levels of transit service. What factors help to explain losses in transit ridership? Increased access to automobiles explains much, if not most, of declining transit use. Private vehicle access has increased significantly in California and, outside of the Bay Area, is likely the biggest single cause of falling transit ridership. Additionally, new ride-hail services such as Lyft and Uber allow travelers to purchase automobility one trip at a time and likely serve as a substitute for at least some transit trips. Finally, neighborhoods are changing in ways that do not bode well for public transit. Households are increasingly locating in outlying areas where they experience longer commutes and less transit access to employment. At the same time, a smaller share of high-propensity transit users now live in the state’s most transit-friendly neighborhoods.

By |2025-04-03T23:06:31-07:00April 3rd, 2025|
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