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Sponsor: CTC

Planning to Better Manage On-Ramp Queues at Ramp Meters

Status

Complete

Project Timeline

April 1, 2013 - March 31, 2015

Principal Investigator

Will Recker

Project Team

Lianyu Chu, Robert Regue

Sponsor & Award Number

CTC: 74A0703

Areas of Expertise

Infrastructure Delivery, Operations, & Resilience

Team Departmental Affiliation

Civil and Environmental Engineering

Project Summary

Effective on-ramp queue management is indispensable for any successful implementation of ramp metering. On-ramp queues impact both freeways and local roadways, and therefore, both the state and local agencies have to participate in the solution. It is difficult to forecast where the freeway-bound demand is going to go if the freeway system breaks down. It is similarly difficult to forecast where the local road-bound demand is going to go if the local road system breaks down. To combat the on-ramp queue issue, ramp metering operation improvement, infrastructure improvement and innovative operational strategies are necessary. We will investigate various potential queue management strategies and evaluate them through microsimulation for a study site in Caltrans District 12. The goal of the project is to develop general guidelines for the better planning, design, and access management at the ramp terminal intersections, based on the on-ramp queue management strategies developed in the previous step.

Preparation of the Vehicle Weight Safety Study Academic Report

Status

In Progress

Project Timeline

September 7, 2024 - June 30, 2026

Principal Investigator

David Brownstone

Project Team

Federico E. Vaca, Jiawei Chen, Chen (Cassie) Zhang

Sponsor & Award Number

CTC: 11899
(Subcontract to UC Berkeley)

Areas of Expertise

Safety, Public Health, & Mobility Justice

Team Departmental Affiliations

Economics, School of Medicine

Project Summary

This project is a subtask to the CTC project “Modeling the impacts of California electric vehicle policies with emphasis on the used vehicle market,” led by Julia B. Griswold at UC Berkeley. This PSR project is building a new model of the California vehicle market that will include the endogenous determination of used vehicle prices and quantities sold.  This model will be augmented to include vehicle weight as a separate attribute, and this will allow us to simulate the impacts of fees based on vehicle weight.  Additional work for this project will include: - Discussion of how a passenger vehicle weight fee may change consumer behavior, taking into consideration the differential weights of comparable zero-emission vehicles and internal combustion engine vehicles and the existing incentives and environmental goals to promote zero-emission vehicle adoption. - Discussion of differential impacts of vehicle weight fees on the used vehicle market.

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