Academic Advisory Panel: Peer Review and Validation of the Five Big Moves

Status

Complete

Project Timeline

December 2, 2019 - November 30, 2020

Principal Investigator

Project Summary

This project focused on providing SANDAG with the latest research, data, and tools that can be used to support the development of the SANDAG 2021 Regional Transportation Plan (RTP), with a focus on identifying how the advances in technology, coupled with public policy can enable the region to rethink and to maximize the coordination between land use and transportation planning and, in particular, operationalizing off-model methodologies for use in SANDAG’s submission of the Sustainable Communities Strategy (SCS) methodology to the California Air Resources Board (CARB).

Modeling Platform for Transport Network Vulnerabilities and System Performance Analysis

Status

In Progress

Project Timeline

August 1, 2023 - August 31, 2025

Principal Investigator

Areas of Expertise

Department(s)

Civil and Environmental Engineering

Project Summary

Developing a mobility system testing environment (a “Living Lab”) of large-enough urban area with multiresolution modeling capabilities, and realistic real-world data inputs. A modeled network of intersections for signal-control testing (from the city of Irvine) and the wider area around it known as Autonomicity will be developed with simulation capabilities for security breaches on a variety of sensor, controller and communication components of the network. The activity system models used for realistic system conditions can be from an even larger network of Orange County that can be modeled at a mesoscopic level using models such as DYNAMART and
POLARIS. This platform will address the network system-level impacts of security breaches from vulnerabilities in the sensor and control systems for vehicular traffic, both in current conditions and the future scenarios of cooperative driving automation (CDA) that are expected in on-demand passenger delivery systems becoming popular now (ridehailing, shared-ride, mobility-as-a-service), and package delivery systems. This research will build on the Transportation Mobility Living Laboratory (TML2) at UCI. TML2 includes a system of infrastructure-based LiDAR that can track all road users across a network of 25 intersections in the City of Irvine to
support safety, efficiency, and energy advances through CDA. Incidents as well as security breaches can result due to inaccuracies of sensor technology. This research will focus on identifying and mitigating the vulnerabilities of the TML2 system to maintain system performance under accidental and nefarious disruptions. System effects of existing traffic sensor and control system breaches: We will develop failure scenarios resulting from potential vulnerabilities and study their system effects (delays, accident probabilities) using simulated microscopic vehicular trajectories in the presence of V2X and CDA applications. The research focus will be on
selected case studies such as on
1. automated lane centering security,
2. safety policy enforcement for Autonomous Driving, and
3. sensor redundancy design for recovery of the transportation system, and
4. IOTbased on-demand passenger delivery system vulnerabilities.
The simulated system developed in the above tasks will be used for predicting transportation domain-specific system effects and designing sufficient redundancy
while facing security breaches and attacks. Dynamic multiple time-period modeling will be used to quantify the lost efficiency in selected Autonomicity network contexts, and this will be used in the design problem:
Multi-objective Performance Evaluation: The platform will incorporate concepts of evaluating the modeled performance outputs using a variety of performance objectives such as
1. degradation and system resilience on temporal measures of performance in the immediate, medium-term and long-term perspectives,
2. vulnerability exposure of different user-classes in the broader activity system and the associated access to transportation srevices,
3. system degradation and resilience on various energy, and environmental impacts with measures such as fuel consumptions, emissions, and their surrogate measures such as VMT (vehicle miles traveled) and VHT (Vehicle Hours Traveled). Disaggregating the components of output measures (e.g., VMT) for various user and vehicle classes can provide richer insights on the impact of vulnerability and security breaches on each class of users.
Keywords and Index Terms:
Simulation platform, transport network performance modeling, agent-based models, cyber-security and system
vulnerability, disruption impacts

policy brief

Using a “Bathtub Model” to Analyze Travel Can Protect Privacy While Providing Valuable Insights

Areas of Expertise

Abstract

Transportation agencies increasingly rely on detailed trip data to analyze traffic patterns and plan infrastructure improvements. However, traditional data collection methods require extensive personal information about travelers’ origins, destinations, and routes, raising serious privacy concerns. Current “big data” approaches can track individual movements with alarming precision, often without explicit consent. As privacy regulations tighten and public concerns grow, transportation planners need alternative methods that balance analytical needs with privacy protection. To address this challenge, the research team evaluated the “bathtub model” as a privacy-preserving alternative to traditional traffic data collection methods. This simple, network-level approach treats all trips in a region as part of one system. Instead of tracking each person’s path, a bathtub model represents trips by how much distance they have left to travel. This allows for analyzation of network performance while protecting privacy.

Investigation of Heavy-Duty Vocational Vehicle Usage and Suitability of Aerodynamic Improvement Devices

Status

Complete

Project Timeline

June 30, 2017 - April 1, 2019

Principal Investigator

Department(s)

Civil and Environmental Engineering

Project Summary

This study seeks to paint a clear picture of the types of vocational class 4 – 6 vehicles, with 14,001 to 26,000 lbs. gross vehicle weight rating, operating in the state of California, how they are used, and by whom.   Furthermore, it will seek to answer questions about the number of Class 4-6 box type vehicles operating within in the state, how many drive at high and low speeds and daily distances they operate within.  This information will be gathered through a survey and data collection exercise and combined in a way that ARB can better understand the statewide impact, aerodynamic improvement devices could have on heavy-duty vocational vehicle fuel economy.

Infrastructure-based Sensor Fusion for Tracking Connected and Autonomous Supply Chain Assets in Cyber-Compromised Environments

Status

In Progress

Project Timeline

August 1, 2023 - August 31, 2025

Principal Investigator

Project Team

Areas of Expertise

Department(s)

Civil and Environmental Engineering

Project Summary

The ongoing growth and economic benefits of America’s largest container ports are threatened by negative externalities associated with port operations, particularly increasing congestion and harmful emissions caused by drayage truck and rail modes serving the ports and traveling to inland transloading, rail yard, warehouse and distribution center facilities. For example, the San Pedro Bay Ports (SPBP) of Los Angeles and Long Beach in Southern California, the largest container port complex in the US and one of the largest in the world, is critical to the nation’s future intermodal logistics system and vital to our economic growth and standard of living. One proposed solution to these issues is to transition the heavy duty (HD) drayage fleet (as well as long haul fleets) to autonomous vehicles (AVs), in order to increase supply chain capacity, throughput, safety, resilience and sustainability.

In this research, we plan to extend our Freight Mobility Living Laboratory (FML2) research of Year 1, which explored the feasibility of LiDAR technology for traffic monitoring in an infrastructure-based, side- fire LiDAR configuration. LiDAR-based microscopic longitudinal and lateral trajectories were obtained for HD vehicles at 0.1 second resolution, enabling site-based detection of anomalies in vehicle behavior. In Year 2, we will develop combined LiDAR and automated license plate reader (ALPR)-based models that will re-identify a potentially cyber-compromised HD AV (based on its anomalous trajectories) over long distances across a complex metropolitan highway network. The LiDAR-based approach to truck tracking is resilient and possesses inherent advantages over other competing technologies: Because LiDAR is an active sensor technology which measures light pulses emitted from the unit itself, it is unaffected by lighting conditions and offers an advantage over traditional cameras where glare, shadows and low-light conditions are known to adversely affect performance. And while automated license plate reader (ALPR) technology has demonstrated high accuracies in plate reads, it cannot be relied upon solely for vehicle reidentification as it performs best when a truck possesses a plate that is present and not obscured, which may not be the case for a cyber-compromised operator that is actively avoiding surveillance. Two existing FML2 study sites spanning over 40-miles across the Los Angeles freeway network – on Interstate I-710 near the SPBP, and on the SR-60 freeway en route to the Inland Empire logistics center, will be used in this study. Data will be collected and processed at both locations to develop a LiDAR point-cloud and ALPR-based long distance tracking and re-identification model to investigate proof-of-concept for corridor and network application of these technologies.

PNT with Signals of Opportunity and Real-World Jammed and Spoofed Environments

Status

Complete

Project Timeline

January 1, 2021 - August 31, 2022

Principal Investigator

Areas of Expertise

Resilience and Validation of GNSS PNT Solutions

Status

Complete

Project Timeline

January 1, 2021 - August 31, 2023

Principal Investigator

Project Team

Areas of Expertise

Department(s)

Information and Computer Science

Aircraft Navigation via Opportunistic Radio Frequency Simultaneous Localization and Mapping

Status

Complete

Project Timeline

November 15, 2021 - September 30, 2023

Principal Investigator

Project Team

Project Summary

This two-year project will develop novel navigation strategies for aircraft in GNSS-denied environments, exploiting ambient terrestrial signals of opportunity.

Development of New Privacy-preserving Method for Traffic Data Collection and Analysis

Status

Complete

Project Timeline

August 1, 2021 - September 30, 2023

Principal Investigator

Areas of Expertise

Department(s)

Civil and Environmental Engineering

Project Summary

Traditional methods for data collection, such as the National Household Travel Survey, focus on trips by a small sample of either travelers, locations, or times. With the prevalence of GPS devices and smartphones, big transportation data from more travelers and locations over longer timespans are more readily available and can substantially help to improve the management, planning, and design of transportation systems. However, travelers, private companies, and public agencies are reluctant to share such data due to privacy concerns. This project will develop a new privacy-preserving method for collecting and analyzing traffic data. This method is based on a new framework for transportation system analysis, in which a network is considered a single entity, and trips are tracked in a relative space with respect to the remaining distance to individual travelers’ destinations. Such data are sufficient for characterizing traffic dynamics but without revealing Personally Identifiable Location Information. This method works for either a city road network or freeway corridors, as well as for multimodal trips. The project will systematically calibrate and validate the new method and will discuss the policy implications for data collection and analysis for California’s traffic systems.