Infrastructure

Local Government Strategies to Improve Shared Micromobility Infrastructure

Shaheen, Susan, PhD
Martin, Elliot, PhD
Cohen, Adam
2024

Shared micromobility (bikesharing and scooter sharing) experienced market growth since 2021, rebounding from the pandemic across markets in the US, Mexico, and Canada. In partnership with the North American Bikeshare and Scootershare Association (NABSA) and Toole Design, researchers at the Transportation Sustainability Research Center (TSRC) at UC Berkeley have collaborated on the data collection and analysis of the shared micromobility industry metrics through a series of annual reports beginning in 2019. This includes a series of operator and agency surveys.1 Most recently, TSRC...

Local Governments Strategies to Improve Shared Micromobility Infrastructure

Shaheen, Susan, PhD
Martin, Elliot, PhD
Cohen, Adam
2024

This brief explores how shared micromobility (bikesharing and scooter sharing) has evolved since the pandemic. Primary data for this report were collected through four surveys: An Operator Survey (n=25) and an Agency Survey (n=52) distributed between January 2022 and May 2022 to all known shared micromobility operators and agencies and included questions about the attributes of shared micromobility systems1 operating within those agency jurisdictions and operator markets; and a similar Operator Survey (n=29) and an Agency Survey (n=52) distributed between January 2023 and June 2023 to all...

Where are Private “Smart City” Transportation Technologies Concentrated in California?

Huang, Amy
Post, Alison E.
Ratan, Ishana
Hill, Mary C.
Zhao, Bingyu
2022

In recent years, “smart city” information and communication technologies have proliferated. For local government agencies, procuring and introducing these technologies offers the possibility to manage infrastructure assets more effectively, plan for preventive maintenance, and disseminate schedules and information about transit and other services. Many of these technologies are deployed by private firms in the context of local regulations and government-sponsored incentives. In the transportation sector, examples of “smart city” technology services provided by private firms include:...

Creating a Regional Program for Preserving Industrial Land: Perspectives from San Francisco Bay Area Cities

Roach, Emily
Chapple, Karen, PhD
2018

Industrial land plays a vital role in supporting the regional economy in the San Francisco Bay Area. It provides the operating space and support services for export sectors and other important local clusters, maintains linkages between businesses and sustains a local supply chain, provides diverse employment opportunities for people with a broad range of skills (including those with lower educational attainment), and supports a high share of middle-wage job opportunities. However, the Bay Area’s current inventory of industrial land (and associated jobs) is at risk due to increasing...

UC Berkeley Develops New User-Friendly Tool to Expedite the Evaluation of Connected Automated Vehicle Technologies

Fu, Zhe
Liu, Hao, PhD
Lu, Xiao-Yun, PhD
2020

Connected Automated Vehicles (CAVs) are similar to other automated vehicles with the distinguishing difference being that CAVs obtain information about road conditionsdirectly from other vehicles and infrastructure (e.g., traffic signals, road sensors) rather than relying solely on onboard sensors. Different CAV technologies are currently being tested and evaluated to assess the prospects for future implementation. These tests involve moving CAV-equipped vehicles on a physical test track and recording how the vehicles operate under different traffic conditions (Figure 1). Since it is...

Inclusionary Zoning in a Monocentric City

Lehe, Lewis
2014

To show how inclusionary zoning alters development, the author finds the most profitable housing design to build on vacant lots at each location in a monocentric city under different regulatory regimes. Section 1 sets up the model by specifying renter's preferences, geography and building parameters. Section 2 solves the developer's profit-maximization problem at each location under each regime. Finally, in Section 3, a numerical simulation confirms the effects predicted by theory and gives a picture of their magnitude.

SimUAM: A Comprehensive Microsimulation Toolchain to Evaluate the Impact of Urban Air Mobility in Metropolitan Areas

Yedavalli, Pavan
Burak Onat, Emin
Peng, Xin
Sengupta, Raja
Waddell, Paul
Bulusu, Vishwanath
Xue, Min
2021

Over the past several years, Urban Air Mobility (UAM) has galvanized enthusiasm from investors and researchers, marrying expertise in aircraft design, transportation, logistics, artificial intelligence, battery chemistry, and broader policymaking. However, two significant questions remain unexplored: (1) What is the value of UAM in a region’s transportation network?, and (2) How can UAM be effectively deployed to realize and maximize this value to all stakeholders, including riders and local economies? To adequately understand the value proposition of UAM for metropolitan areas, we develop...

Aviation System Performance Measures

Gosling, Geoffrey D.
1999

Within the transportation community, there is a growing recognition of the need to consider decisions addressing future investments in the transportation system from a multimodal perspective. This viewpoint has been given added weight by the passage of the Intermodal Surface Transportation Efficiency Act (ISTEA) in 1991, which not only recognized the importance of viewing the transportation system from an intermodal perspective, but also stressed the need to address the efficiency with which the system meets the transportation needs of its users. This approach was reinforced with the...

Life-cycle Environmental Inventory of Passenger Transportation in the United States

Chester, Mikhail V
2008

Energy use and emission factors for passenger transportation modes typically ignore the total environmental inventory which includes vehicle non-operational components (e.g., vehicle manufacturing and maintenance), infrastructure components, and fuel production components from design through end-of-life processes. A life-cycle inventory for each mode is necessary to appropriately address and attribute the transportation sector’s energy and emissions impacts to reduction goals instead of allowing tailpipe emissions to act as indicators of total system performance.

The contributions...

Optimal Infrastructure System Maintenance and Repair Policies with Random Deterioration Model Parameters

Park, Sejung
2004

Accurate facility deterioration models are important inputs for the selection of Infrastructure Maintenance, Repair, and Reconstruction (MR & R) policies. Deterioration models are developed based on expert judgment or empirical observations. These resources, however, might not be sufficient to accurately represent the performance of infrastructure facilities. Incorrect deterioration models may lead to wrong predictions of infrastructure performance and selection of inappropriate MR & R policies. This results in higher lifecycle costs. Existing infrastructure MR & R...