Category: 2018

PI: Baabak Ashuri

Co-PI(s): 

Institution(s): Georgia Institute of Technology

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Abstract

Prepared in cooperation with the Georgia Department of Transportation, Office Right of Way (ROW), this research found the current state of the practice in right of way acquisition among state DOTs to identify best practices with the greatest potential to improve ROW acquisition, including: (a) the organizational structures of the office of ROW, (b) the process of using consultants and performance measurements, and (c) the best practices and strategies used to expedite ROW acquisition. The research utilized the following tasks to evaluate opportunities to estimate the ROW acquisition timeline, considering unique project features and important external factors surrounding the project environment: (a) identify important factors in setting the ROW acquisition timeline, (b) collect required data, (c) conduct data mining to evaluate opportunities to estimate the ROW acquisition timeline.

Project Video

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PI: Michael Hunter

Co-PI(s):  

Institution(s): Georgia Institute of Technology

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Abstract

The Georgia Department of Transportation (GDOT) is committed to maintaining safety on Georgia?s roadways and providing an efficient, cost-effective transportation system. Often, this requires the analysis of transportation facilities, such as a single intersection, an arterial corridor, a freeway interchange, etc. Where analytical tools such as the Highway Capacity Software? (HCS), SYNCHRO?, etc. do not adequately represent traffic operations within a study area, or do not provide the necessary performance metric(s) required for the analysis, detailed simulation or similar approaches may be required. In such cases GDOT typically employs VISSIM? as the preferred transportation modeling tool. VISSIM?, a microscopic simulation tool, can be a powerful resource for project analysis; however, with its use comes many complexities and challenges not found in analytic modeling tools. As such, this project develops guidance material that enhances GDOT?s ability to review and utilize VISSIM? models.

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PI: Yang Wang

Co-PI(s):  

Institution(s): Georgia Institute of Technology

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Abstract

This project seeks to develop a low-cost wireless system for BWIM (bridge weigh-in-motion). The system incorporates a next-generation high-fidelity portable wireless sensing system, named Martlet. This poster presents preliminary work completed towards achieving the goal of BWIM. Field installation of the sensors and control testing has been completed. Using wireless sensing data in-situ, vibration modal analysis of the bridge structure has been performed. Bridge weigh-in-motion performance has been evaluated using a simulation model.

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PI: Michael Rodgers

Co-PI(s): Franklin Gbologah, Anqi Wei, Soonkie Nam 

Institution(s): Georgia Institute of Technology

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Abstract

To provide guidance that helps GDOT decide, on a project level decision basis, the type and extent of: – active illumination treatment – passive retroreflective treatments – other alternative illumination treatments that should be applied to rural and suburban roundabouts on both a roundabout and approach basis based on specific roadway and traffic conditions

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PI: Patricia Mokhtarian

Co-PI(s): Gwen Kash

Institution(s): Georgia Institute of Technology

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Abstract

Transit access/egress travel is typically considered to be an intrinsic part of the transit trip itself. However, because transit access/egress travel is a major source of nonmotorized travel (NMT), particularly walking, this bundling poses an obstacle to accurately estimating the frequency of walking and biking because it ?hides? access/egress travel inside public transit trips. Using data from the 2017 NHTS Georgia subsample this project examines how to ensure that this hidden walking and biking gets counted. We provide an overview of how access/egress travel is measured in the 2017 NHTS. We then describe our methods for extracting and analyzing instances of walking and biking that are stored in the data as access/egress travel and formatted differently than independent trips. We highlight two key findings: (1) walking is the predominate mode of transit access egress travel and (2) including access/egress travel increases the number of instances of walking and biking by 27.7% compared to using separate trips alone. Incorporating access and egress travel is important to avoid underestimating NMT, particularly among transit-dependent people.

Project Video

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PI: Michael Hunter

Co-PI(s): Angshuman Guin

Institution(s): Georgia Institute of Technology

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Technical Report Document: GDOT RP 18-23

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PI: Baabak Ashuri

Co-PI(s): 

Institution(s): Georgia Institute of Technology

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Abstract

State departments of transportation (state DOTs) have implemented transportation financial plans to utilize federal and state transportation funding within at least a four-year horizon and possibly longer. It is critical for state DOTs to maintain adequate cash balance that helps establish a clear transportation plan and program. Over the past decades, an array of alternative project delivery methods has been introduced to enhance the financing capabilities of the state DOT. The new delivery methods need to be properly treated in developing more realistic cash flow models for the project expenditures.

Project Video

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PI: Roger Purcell

Co-PI(s): David Scott, Soonkie Nam and Gustavo Maldonado

Institution(s): Georgia Southern University

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Abstract

This research establishes ways to serve the Surveying-Geomatics (S-G) education needs of place-bound students such as Georgia Department of Transportation (GDOT) personnel and others. It addresses the need for personnel with a 21st Century education (knowledge and skill) in Surveying-Geomatics (S-G). Many factors including: lack of traditional student interest, lack of student preparedness, retirement-replacement issues, ever expanding technology & education materials, and post-recession demand has forced the Georgia S-G community to recognize the need for an alternative approach to Surveying-Geomatics education. Thus, this study proposes a viable solution to the lack of S-G education availability and focuses on ways to foster Professional Land Surveyor (PLS) licensure and improvements in salary and benefits for educated/licensed surveyors. The study also, includes a detailed survey based on matrix analysis of S-G knowledge/skill expectations, S-G position characterization and S-G education Subject Area coverage. The results of the survey are analyzed to support the understanding of the breadth and depth of the 21st century S-G education among the Georgia S-G community.

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PI: Giovanni Circella

Co-PI(s):  

Institution(s): Georgia Institute of Technology

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Abstract

This project proposed a number of improvements in the Georgia Statewide Travel Demand Model (GSTDM) using the 2017 National Household Travel Survey (NHTS) and its Georgia add-on portion. These improvements include (1) the development of a vehicle ownership model and a time-of-day segmentation, (2) estimating and evaluating a destination choice model, and (3) investigating a mode choice model for the GSTDM. Considering the importance of these model improvements, the research team conducted extensive reviews of the state of research and practice on the mentioned topics, augmented the 2017 NHTS data with other relevant data sources, developed appropriate methodologies, and presented the results and discussed their application in the GSTDM in this report.

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