ITS Berkeley

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...

Simulation Techniques to Obtain Confidence Intervals for Willingness to Pay Measures

Espino, Raquel
Ortuzar, Juan de Dios
Roman, Concepcion
2004

We obtain confidence intervals for willingness-to-pay (WTP) measures derived from a mode choice model estimated to analyse travel demand for suburban trips in the two main interurban corridors in Gran Canaria island, using a mixed RP/SP data base. We considered a specification of the systematic utility that incorporates income effect and interactions among socioeconomic variables and level-of-service attributes, as well as between travel cost and frequency. As our model provides rather complex expressions of the marginal utilities, we simulated the distribution of the WTP (in general,...

Improved Data Measurement Using Existing Loop Detectors

Coifman, Benjamin
1999

This paper develops an improved algorithm for estimating velocity from isolated loop detector data. Unlike preceding works, the algorithm is simple enough that it can be implemented using existing controller hardware. The discussion shows how the benefits of this work extend to automated tests of detector data quality at dual loop speed traps. Finally, this paper refutes an earlier study that found conventional isolated loop velocity estimates are biased keywords: traffic surveillance, single loop detectors, velocity estimation data screening

MPO Planning and Implementation of State Policy Goals

Barbour, Elisa
Rodriguez, Emil
Thoron, Noah
Handy, Susan
Lee, Amy
2021

MPO Planning and Implementation of State Policy Goals evaluates California metropolitan planning organizations’ regional transportation plans and sustainable communities strategies and looks at the relationship between MPO plans and what is actually funded through transportation improvement programs.

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.

Some Properties of a Multi-Lane Extension of the Kinematic Wave Model

Laval, Jorge A.
2003

This paper extends an existing continuum multi-lane formulation for traffic flow, provides a discrete formulation for its numerical solution, and show initial results. The new formulation enables a natural treatment of boundary conditions such as merges, diverges, lane-drops and moving bottlenecks. The proposed model needs few extra parameters and is parsimonious. The look-ahead distance, for example, induces that non-local conditions affect the flow at any time-space point, causing smooth regime changes and fast waves. We find that as the look-ahead distance tends to zero, the solution...

Flexibility in California Transportation Funding Programs and Implications for More Climate-Aligned Spending

Segal, Katie
Elkind, Ethan
Lamm, Ted
2021

Flexibility in California Transportation Funding Programs and Implications for More Climate-Aligned Spending examines key features of the legislative authority for transportation planning and finance in California, including local option sales taxes for transportation, and assesses the amount of flexibility that current laws and practices allow for reprioritizing projects as problems and priorities change.

Evaluation of California State and Regional Transportation Plans and Their Prospects for Attaining State Goals

Deakin, Elizabeth
Chow, Chun Ho
Son, Daisy
Handy, Susan
Barbour, Elisa
Lee, Amy
Rodriguez, Emil
Gahbauer, John
Coutin, Talia
Matute, Juan
Rios Gutierrez, Alejandra
Rios Gutierrez, Nataly
Segal, Katie
Elkind, Ethan
Lamm, Ted
2021

Assembly Bill (AB) 285 (Friedman, 2019) requires the California Strategic Growth Council (SGC) to submit a report to the Legislature by January 31, 2022, that includes the following:An overview of the California Transportation Plan (CTP). An overview of all regional Sustainable Communities Strategies (SCS) and any alternative planning strategies, as needed. An assessment of how the implementation of the CTP and regional plans “will influence the configuration of the statewide integrated multimodal transportation system.”  A “review of the potential impacts and opportunities for...

An Analysis of Air Passenger Average Trip Lengths and Fare Levels in US Domestic Markets

Huang, Sheng-Chen Alex
2000

At a national level it is common to express the amount of air travel in terms of the number of revenue passenger miles flown or the number of enplaned passengers. This provides a way to resolve the difficulty of how to aggregate measures of air travel in many different markets of many different distances. However, information about the distribution of trip lengths is lost in the process. This information is of interest for a number of reasons. The type of aircraft that is most appropriate for different markets depends on the distances involved. The length of the trip is also likely to...

A Five-Year Development Plan for the California Aviation Database

Tsao, H.-S. Jacob
1999

The California Aviation Database (CAvD) project was suggested by Caltrans Aeronautics Program to fulfill a need of the planners involved in aviation system planning and programming activities to locate and access aviation data and information in an efficient and comprehensive way. CAvD is being implemented in the form of an Internet website and is currently intended as a five-year project. However, the development can be accelerated, and the duration will depend on the available resources. CAvD is a joint project between the National Center of Excellence for Aviation Operations Research(...