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Project Details
STATUS

In-Progress

START DATE

04/16/24

END DATE

04/15/26

FOCUS AREAS

Safety

RESEARCH CENTERS InTrans, CTRE, REACTOR
SPONSORS

National Cooperative Highway Research Program (NCHRP)

Researchers
Principal Investigator
Christopher Day

Research Scientist, CTRE

Co-Principal Investigator
Kevin Lee

Researcher, Illumine Transportation

Co-Principal Investigator
Edward Smaglik

Researcher, Northern Arizona University

Co-Principal Investigator
Anuj Sharma

Co-Director, REACTOR

Co-Principal Investigator
Keith Riniker

Researcher, Mead & Hunt

Co-Principal Investigator
Kevin Chang

Researcher, University of Idaho

About the research

This research project seeks to develop guidance on updating the Signal Timing Manual (STM) to incorporate the results of research products developed after the publication of the second edition (STM2). The research will evaluate the current manual content and structure and develop a portfolio of content centered around an updated third edition (STM3). In addition to integrating new technical content, this research will establish a roadmap for future long-term maintenance of the STM as a document to serve as a knowledge base for traffic signal timing, by investigating how the STM is currently used, identifying the audiences for the manual, and whether this user base has additional needs that can be better served with refinement of the document.

Project Details
STATUS

In-Progress

START DATE

04/05/24

END DATE

11/30/25

RESEARCH CENTERS InTrans, CTRE
SPONSORS

National Cooperative Highway Research Program (NCHRP)

Researchers
Principal Investigator
Inya Nlenanya

Research Scientist, CTRE

Co-Principal Investigator
Alireza Sassani

Research Scientist, CTRE

Co-Principal Investigator
Skylar Knickerbocker

Research Scientist, CTRE

Co-Principal Investigator
Omar Smadi

Director, CTRE

About the research

State departments of transportation (DOTs) and other transportation organizations have a wealth of data. This data is stored in multiple environments and formats and is accessible by various methods. Some of these environments easily integrate, while others require complex programming. At times, the cost of this integration outweighs the potential benefit.

This research aims to develop a guide for enterprise data warehouse (EDW) development and best practices to support DOT business needs. While many warehousing technologies can be chosen and implemented, from SAS to Snowflake, for example, many of these can meet the basic needs of a DOT. What gets overlooked when deploying an enterprise data environment is not directly related to the technology. This research will not only look at technology and traditional data governance practices but address how best practices in services/APIs, software ecosystems, security of data and systems, and the culture of an organization complement a thriving data ecosystem.

Project Details
STATUS

In-Progress

START DATE

04/15/24

END DATE

04/14/26

FOCUS AREAS

Safety

RESEARCH CENTERS InTrans, CTRE
SPONSORS

National Cooperative Highway Research Program (NCHRP)

PARTNERS

Exponent Engineering and Scientific Consulting and the Institute of Transportation Engineers

Researchers
Principal Investigator
Shauna Hallmark

Director, InTrans

Co-Principal Investigator
Jonathan Wood

Faculty Affiliate, CTRE

About the research

The project will gather information about factors that encourage speeding, speed reduction strategies, and how agencies holistically address speed management. This will be accomplished through a formal literature review and a survey of agencies, followed by several workshops that will engage diverse teams to generate insights into factors and behaviors that encourage speeding. Building on this, the research team will first develop an outline and then fully develop an Integrated Strategies for Speed Management Framework (ISSMF) guidebook. It is anticipated that the ISSMF will be patterned as a guidebook to assist state Departments of Transportation (DOTs), transportation agencies, and their partners in accessing tools and strategies to manage excessive speeds. The guidebook will also provide strategies to overcome institutional barriers in various communities with the help of strategic partners (e.g., county public health departments, local hospitals, local news media, enforcement,
and judication).

The guidebook will provide developed, integrated strategies for the speed management framework. These strategies will be flexible enough to deal with and address issues such as global pandemics and any siloed funding of the disconnected parts of the system, as well as provide an increased awareness of social inequities in transportation safety and access to transportation, along with technological breakthroughs. The guidebook will include development of speed modification factors (SMF) when sufficient information is available for a particular countermeasure. SMFs will be developed using a systematic review and meta-analysis of existing studies.

Project Details
STATUS

In-Progress

START DATE

04/01/24

END DATE

03/31/27

FOCUS AREAS

Infrastructure

RESEARCH CENTERS InTrans, BEC
SPONSORS

National Cooperative Highway Research Program (NCHRP)

PARTNERS

CHA Consulting, Inc. and Modjeski and Masters, Inc.

Researchers
Principal Investigator
Behrouz Shafei

Structural Engineer, BEC

Co-Principal Investigator
Brent Phares

Bridge Research Engineer, BEC

Co-Principal Investigator
Alice Alipour

Structure and Infrastructure Engineer, BEC

Co-Principal Investigator
Justin Dahlberg

Director, BEC

About the research

The objective of this research is to develop recommendations for effective bridge construction requirements that align with current bridge design and construction methods to provide clear expectations and minimize ambiguity. As part of the preliminary study on the Evaluation and Updating of the American Association of State Highway Transportation Officials (AASHTO) LRFD Bridge Construction Specifications (BCS Report 2021), two partners of the research team conducted a comprehensive survey of state transportation agencies (STAs) and other public owners to understand how they are currently using the AASHTO LRFD BCS. The specific objectives were to determine the use of the document, a review of the document contents, the development of a prioritized approach for reorganizing and maintaining the document, and the development of prioritized recommendations for updating the document. The study concluded that the AASHTO LRFD BCS is being used by many STAs on a regular basis, justifying future updates and maintenance.

Project Details
STATUS

In-Progress

START DATE

04/16/24

END DATE

10/15/26

SPONSORS

National Cooperative Highway Research Program (NCHRP)

PARTNERS

Kittelson and Associates, Inc., Metadata Game Changers, LLC, and Precision Systems, Inc.

Researchers
Principal Investigator
Christopher Day

Research Scientist, CTRE

Co-Principal Investigator
Anuj Sharma

Co-Director, REACTOR

About the research

The objective of this research is to develop a guide for agencies that operate and maintain traffic signals to help ensure that their investments in automated traffic signal performance measure (ATSPM) systems can be sustained in the long term. This guidance will address limitations in current ATSPM systems, including the lack of metadata standards, the need for data management policy guidance, and opportunities to prepare for future innovations in traffic operations, such as connected and automated vehicles (CAVs), connected vehicles (CVs), enhanced detection systems, cloud computing, and so forth.

Project Details
STATUS

In-Progress

START DATE

10/16/23

END DATE

10/15/26

RESEARCH CENTERS InTrans, CMAT
SPONSORS

National Cooperative Highway Research Program (NCHRP)

Researchers
Principal Investigator
Jennifer Shane

Director, CMAT

About the research

This research aims to develop guidelines and tools for state Departments of Transportation (DOTs) to identify and align utility investigations (UIs) and related efforts to project characteristics and project development phases, seeking to avoid or minimize utility impacts that lead to increased project costs and delays.

Project Details
STATUS

In-Progress

START DATE

02/22/23

END DATE

08/21/25

RESEARCH CENTERS InTrans, CMAT
SPONSORS

National Cooperative Highway Research Program (NCHRP)

Researchers
Principal Investigator
Roy Sturgill

Construction Engineer, CMAT

About the research

Advances in technology have introduced equipment and tools to facilitate three-dimensional (3D) engineered models for construction, including the use of automated machine guidance (AMG) for grading and excavating; fine grading and base preparation; and concrete paving. Contractors traditionally use the contract plan sets to create their own 3D models, but a trend to deliver digital data as a supplement to the plan sets is emerging. Incorporating 3D model-based design has enabled project teams to communicate design intent to downstream users more effectively, and offers opportunities to improve overall efficiency of the highway infrastructure project delivery process. However, changing the medium of construction contract information also creates a procedural challenge for field inspections.

To replace two-dimensional (2D) plan sheets with 3D models could make it challenging for inspectors to accomplish field verification of contract requirements, which requires user-friendly tools specifically designed for construction inspection tasks to review contract requirements in a new, digital medium. Therefore, research is needed to aid state departments of transportation (DOTs) to evaluate the technical requirements for the selection of 3D model viewers to be implemented for model-based construction inspection.

The objective of this research is to develop a guide for state DOTs to evaluate the technical requirements for the selection of 3D model viewers for construction inspection.

Project Details
STATUS

In-Progress

START DATE

10/20/22

END DATE

10/20/25

RESEARCH CENTERS InTrans, CMAT
SPONSORS

National Cooperative Highway Research Program (NCHRP)

Researchers
Principal Investigator
Roy Sturgill

Construction Engineer, CMAT

Co-Principal Investigator
Jennifer Shane

Director, CMAT

About the research

The aim of this project is to develop guidelines that provide departments of transportation (DOTs) with effective practices for retrieving, depicting, and managing utility location data that may come from a host of sources; may represent existing, proposed, abandoned, or relocated facilities; may involve and identify utility conflicts; and may entail inconsistencies requiring reconciliation.

Project Details
STATUS

Completed

START DATE

01/01/11

END DATE

01/31/13

FOCUS AREAS

Infrastructure

RESEARCH CENTERS InTrans, CTRE
SPONSORS

National Academy of Sciences
National Cooperative Highway Research Program (NCHRP)

Researchers
Principal Investigator
Neal Hawkins

Director Research Administration, ISU

Co-Principal Investigator
Omar Smadi

Director, CTRE

About the research

The Transportation Research Board’s (TRB’s) National Cooperative Highway Research Program (NCHRP) Synthesis 439: Use of Transportation Asset Management Principles in State Highway Agencies explores the state of practice for transportation asset management among state departments of transportation.

Project Details
STATUS

Completed

START DATE

09/22/20

END DATE

05/13/22

RESEARCH CENTERS InTrans, CMAT
SPONSORS

National Cooperative Highway Research Program (NCHRP)

Researchers
Principal Investigator
Roy Sturgill

Construction Engineer, CMAT

Co-Principal Investigator
Katherine Madson

About the research

While it is recognized to be in the public interest to permit the installation of utility infrastructure in roadway rights-of-way, the practice has contributed to utility-related issues being one of the leading causes of delays for transportation projects. Subsurface utility engineering (SUE) is an approach state departments of transportation (DOTs) have implemented to locate utilities and assist their project-development teams with avoiding these issues.

The TRB National Cooperative Highway Research Program’s NCHRP Synthesis 583: Implementation of Subsurface Utility Engineering for Highway Design and Construction documents state DOT use and practices related to SUE and specifically examines how and when SUE is implemented during the project-design and delivery processes.

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