Transportation Engineering Commons^™

Interdisciplinary Education Outreach With Traffic Sensor Build Kits, Sarah V. Hernandez, Mariah B. Crews

Civil Engineering Teaching and Learning

The goal of this project was to attract K-12 students to transportation engineering careers through STEM outreach programs. To accomplish this goal, the object of the project was to design and implement maritime freight oriented educational outreach activities centered on traffic sensing technologies for middle, high school, and first-year college students. In MarTREC Project 5011 (Evaluating the Performance of Intermodal Connectors), the research team designed a low-cost, easily implementable LiDAR and Bluetooth sensor bundle that was capable of detecting, characterizing, and tracking freight trucks as they traveled to and from inland waterway port areas. The sensor provided data necessary to …

Examining The Effects Of Reducing The Cement Content Of Portland Cement Concrete Pavement, Bryan Casillas

Graduate Theses and Dissertations

Portland cement is a significant component in a concrete mixture. For concrete used in portland cement concrete pavement (PCCP), the Arkansas Department of Transportation (ARDOT) specifies a minimum cementitious material content of 564 lb/yd3 and a maximum water-cementitious material ratio of 0.45. Prior research conducted at the University of Arkansas, TRC 0603, indicated concrete mixtures used in five bridge decks throughout Arkansas achieved the required 28-day strength at seven days, and the measured compressive strength at 28 days was 30% greater than required. The use of high strength concrete in pavements throughout the state can increase cracking and consequently reduce …

Quantifying Workability, Compactability, And Cohesion Gain Of Asphalt Emulsion Cold In-Place Recycling, Sadie Casillas

Graduate Theses and Dissertations

To maximize the life and quality of a pavement, proper maintenance and rehabilitation are essential. Strategies for pavement rehabilitation with many sustainable benefits are pavement recycling. This dissertation focuses on two types of in-situ pavement recycling: Cold in-place recycling (CIR) stabilized with asphalt emulsion and full depth reclamation (FDR) stabilized with asphalt emulsion or foamed asphalt. One white paper (Chapter 2), two accepted peer reviewed journal articles (Chapters 3 and 4), and one submitted peer reviewed journal article (Chapter 5) are presented in this document to create better understanding of the unique material characterization of asphalt emulsion cold recycled materials, …

Verifying The Calcium Oxychloride Threshold In Cementitious Pastes, Fatoumata Traore

Graduate Theses and Dissertations

Calcium oxychloride (CAOXY) formation is a serious deterioration mechanism known to cause joint damage in concrete pavements. CAOXY is the product of a chemical reaction between calcium chloride (CaCl2) or magnesium chloride (MgCl) deicing salts and calcium hydroxide in the cementitious matrix. Currently, the accepted CAOXY threshold at which deterioration is mitigated in cementitious paste is 15 g/100 g paste (15 oz/100 oz paste); however, this limit was developed using flexural strength testing. For this investigation, the current threshold was evaluated using compressive strength and mass change over time in paste specimens exposed to CaCl2. Fly ash is used to …

Commodity-Based Freight Activity On Inland Waterways Through The Fusion Of Public Datasets For Multimodal Transportation Planning, Magdalena I. Asborno

Graduate Theses and Dissertations

Within the U.S., the 18.6 billion tons of goods currently moved along the multimodal transportation system are expected to grow 51% by 2045. Most of those goods are transported by roadways. However, several benefits can be realized by shippers and consumers by shifting freight to more efficient modes, such as inland waterways, or adopting a multimodal scheme. To support such freight growth sustainably and efficiently, federal legislation calls for the development of plans, methods, and tools to identify and prioritize future multimodal transportation infrastructure needs. However, given the historical mode-specific approach to freight data collection, analysis, and modeling, challenges remain …

Online Survey Of Driver Comprehension Of The Flashing Yellow Arrow For Right-Turn Signal Indications, Sirisha Kothuri, Christopher Monsere, Hisham Jashami, David Hurwitz

Civil and Environmental Engineering Faculty Publications and Presentations

This paper presents the results of an online survey of licensed driver comprehension of the right-turn signal displays with a focus on the flashing yellow arrow (FYA) and also including the circular green and red and red arrow. Recruitment postcards were mailed to a random sample of 9,872 residents in Oregon. The online survey yielded 399 responses. The open-ended responses were coded for comprehension and analyzed. The results suggest that FYA for right turns is well understood by Oregon drivers despite its current novelty (only two locations at the time of the research). Importantly, survey respondents were more likely to …

Development Of An Improved Arterial Roadway Performance Reliability Methodology, Ernest Tufuor

Department of Civil and Environmental Engineering: Dissertations, Theses, and Student Research

The need for reliable performance measures of urban arterial roadways is increasing because of the rise in traffic congestion and the high value of travel time. Consequently, travel time reliability (TTR), which combines components of measures of central tendency and measures of dispersion of travel times, has recently received considerable research interest.

The basis of all TTR metrics is the travel time distribution (TTD). Estimating and forecasting arterial TTDs for TTR analysis is the focus of this dissertation. This dissertation proposes a new TTR methodology that is a marked improvement on recent TTR estimation and forecasting methodologies including the current …

Case Study: Diesel-Powered Loaders Compared To Hybrid Loaders In Heavy Civil Construction, Jesus O. Pena

Construction Management

With the construction industry constantly changing, the environmental impacts of greenhouses gases have become a huge concern. Many contractors are adapting and switching over to hybrid powered systems to allow for more energy saving methods for heavy equipment, an increase in productivity, and efficient construction equipment that comply with emission regulations. The goal for this paper is to analyze the feasibility of heavy civil construction companies switching over from conventional diesel-powered wheel loaders to hybrid wheel loaders. Due to the competitive and saturated market in roadwork construction, many contractors have already begun to invest into hybrid systems. This provides cost …

Congestion-Clearing Payments To Passengers, Paul Minett, John S. Niles, Richard W. Lee, Brittany Bogue

Mineta Transportation Institute

Peak period motor vehicle traffic volume congests roads all over the world. This project hypothesizes implementing congestion- clearing payments to passengers as a permanent congestion-management solution. Ongoing congestion-free travel would be achieved by removing existing congestion, and absorbing (re)generated demand, at costs that would be expected to increase as the total number of travelers increases over time. The project develops a comprehensive, step-by-step methodology to calculate the benefits and costs of paying for drivers to become passengers at a congestion-clearing level and to maintain this level over time. The method is derived from the literature, analysis by the project team, …

A Multimodal Approach For Monitoring Driving Behavior And Emotions, Arash Tavakoli, Vahid Balali, Arsalan Heydarian

Mineta Transportation Institute

Studies have indicated that emotions can significantly be influenced by environmental factors; these factors can also significantly influence drivers’ emotional state and, accordingly, their driving behavior. Furthermore, as the demand for autonomous vehicles is expected to significantly increase within the next decade, a proper understanding of drivers’/passengers’ emotions, behavior, and preferences will be needed in order to create an acceptable level of trust with humans. This paper proposes a novel semi-automated approach for understanding the effect of environmental factors on drivers’ emotions and behavioral changes through a naturalistic driving study. This setup includes a frontal road and facial camera, a …

Exploratory Analysis Of Recent Trends In School Travel Mode Choices In The U.S., Abhay Lidbe, Xiaobing Li, Emmanuel Kofi Adanu, Shashi Nambisan, Steven Jones

Civil and Environmental Engineering and Construction Faculty Research

The study explores the recent trends in school travel using the 2017 National Household Travel Survey data. The study also investigates the exogenous factors affecting the school travel mode choice using random parameters multinomial logit (RPMNL) model. The results indicate that urban school trips range between 3 and 5 miles, whereas, average rural trips are longer than 6 miles. School commute times are higher among lower-income households. Further, the share of school bus and auto has declined while that of walking and biking has increased in 2017. This change is significant among high school students. Like other studies, the findings …

Current State And Prospects Of Construction Of High-Speed Railway Overpasses In Seismic Conditions Of The Republic Of Uzbekistan, Ulugbek Zabixullayevich Shermuxamedov, Saidxon Salixanovich Salixanov

Journal of Tashkent Institute of Railway Engineers

The article deals with the issues of seismic stability of high-speed railway overpasses in the Republic of Uzbekistan, taking into account the experience of their design and construction in developed foreign countries. A review of technical solutions to ensure the seismic stability of overpasses and bridges located on high-speed and high-speed Railways in the world and in the Republic of Uzbekistan. Features of ensuring seismic stability of bridges and overpasses on high-speed lines are given.

Substantiation Of Technical And Economic Indicators Of Modern Technologies With The Current Maintenance Of The Subgrade Of Railways, Pardaboy Abduraximovich Begmatov, Sunnatulla Sulaymanov, Sherzod Amirkulovich Tadjibayev

Journal of Tashkent Institute of Railway Engineers

The article summarizes the results of a comparison of technical and economic indicators of existing technologies used to clean and destroy herbs and shrubs on the territory of the railway line. It was proved that the use of small means of mechanization in the performance of work included in the routing is effective.

About The Influence Of A Zeolite Containing Filler (Natrolite) On The Properties Of Cement Binder, Anvar Ishanovich Adilkhodjayev, Ilkhom Abdullaevich Kadyrov, Kadyr Saparbaevich Umarov

Journal of Tashkent Institute of Railway Engineers

The issue of the influence of the zeolite-containing filler of the Beltau field on the properties of cement binder is considered. Graphically presented are the experimental results of the effect of dispersion and degree of filling on the strength of cement stone. The data obtained confirm the advisability of using this type of filler in concrete.

Research Of Running Resistance To Longitudinal Movement Of Rails On Jsc "Zbekiston Temir Yulari", Gali-Askar Khalfin

Journal of Tashkent Institute of Railway Engineers

This article presents the main design characteristics of a joint-less track, analyzes the linear resistance to longitudinal movements of rails, and also shows the design of a special measuring stand and measurement methods. The result of testing the Methodology the first stage will be obtained materials that are required for the preparation of new regulations on laying, maintenance and repair of seamless way, including with whips length block area and stage, as well as for the development of technological processes for the production of certain types of track work.

Automation Of The Process Of Attaching Locomotives To Trains In Conditions Of A Non-Pairing Graphics, Marufdjan Xalikovich Rasulov, Makhamadaziz Makhamadaminovich Rasulmukhamedov, Shinpolat Mansuralievich Suyunbayev, Masud Numonzhonovich Masharipov

Journal of Tashkent Institute of Railway Engineers

As you know, in the conditions of an unpaired train schedule at points of turnover and re-coupling of locomotives, it becomes necessary to determine candidates for dispatch or dispatch of locomotives in reserve. In this article, a technology has been developed to minimize the downtime of locomotives at points of turnover and re-coupling in conditions of their insufficiency or excess. In order to automate the process of identifying candidates for sending or sending locomotives, an algorithm has been created in reserve and a program for solving this problem on a computer has been developed. The developed computer program on the …

About Fastening Cargo On The Wagon Under The Influence Of Transverse Forces, Yadgor Ozodovich Ruzmetov, Jamol Shihnazarov

Journal of Tashkent Institute of Railway Engineers

The content of the article is devoted to the incorrectness of the existing methodology for calculating freight fastening. Based on the conducted research, the article proved that the strength of freight fasteners subjected to transverse forces is not provided. The existing methodology for calculating freight fastenings, firstly, does not take into account the force of preliminary twists of the fastening wire, which increase the adhesion force of the freight to the car floor, and secondly, it does not take into account freight shifts that occur during transportation. The force in all wire fasteners subjected to transverse forces, depending on the …

Systematization Of Factors Influencing During Processing Of Wagons At The Sorting Station, Dilmurod Baхodirovich Butunov, Nodir Kodirovich Aripov, Alfiya Mirkhatimovna Bashirova

Journal of Tashkent Institute of Railway Engineers

This article discusses the issues of systematization of factors affecting the main quality indicator of the operation of the sorting station. The methods of system and factor analysis and statistical data processing are used. The structure of the elements for the transit wagon transit time with processing at the sorting station has been developed. Systematized factors affecting the processing of wagons at the sorting station according to the elements of the time spent in transit wagon.

Evaluation Of The Efficiency Of Diesel Locomotives On The Section Of Marokand - Kattakurgan Of Uzbek Railway, Oleg Sergeyevich Ablyalimov, Jasur Djura Ug'li Khodjiyev

Journal of Tashkent Institute of Railway Engineers

A comparative analysis of the efficiency of using diesel traction locomotives in the Marokand - Kattakurgan section of the Uzbek Railway for freight trains with and without stops at intermediate stations, siding and separate points is given. Mathematical models of conducting freight trains by diesel-powered locomotives were developed, specific resultant forces of the train were calculated and built in the modes of traction, idling and braking, curves of the speed of movement and time of the train on the considered real railway section. The kinematic parameters of the movement of freight trains and the main energy indicators of the transportation …

Improvement Of Technological Standards Spent On Local Cars During Cargo Delivery, Jamshid Renatovich Kobulov, Jamshid Sayfullayevich Barotov

Journal of Tashkent Institute of Railway Engineers

The article analyzes the norms of time that affect the movement of cars in case of violation of the terms of delivery of goods when sending cars from the station. When delivering goods from the shipper to the station track from the shipper to the shipper, a sequence was developed to find the total amount of time for performing operations on their Assembly from the station, as well as the total amount of time spent on technological operations before transferring the cars to the cargo owners at the designated station. After the arrival of local cars at the unloading station, …