Subjects -> TRANSPORTATION (Total: 214 journals)
    - AIR TRANSPORT (9 journals)
    - AUTOMOBILES (26 journals)
    - RAILROADS (10 journals)
    - ROADS AND TRAFFIC (9 journals)
    - SHIPS AND SHIPPING (43 journals)
    - TRANSPORTATION (117 journals)

TRANSPORTATION (117 journals)                     

Showing 1 - 53 of 53 Journals sorted by number of followers
Journal of Navigation     Hybrid Journal   (Followers: 200)
Accident Analysis & Prevention     Hybrid Journal   (Followers: 111)
Transportation Research Part B: Methodological     Hybrid Journal   (Followers: 38)
Transportation Research Part A: Policy and Practice     Hybrid Journal   (Followers: 38)
Urban, Planning and Transport Research     Open Access   (Followers: 33)
Transportation     Hybrid Journal   (Followers: 32)
Transportation Research Record : Journal of the Transportation Research Board     Full-text available via subscription   (Followers: 29)
Transportation Research Part C: Emerging Technologies     Hybrid Journal   (Followers: 29)
Journal of Transport and Land Use     Open Access   (Followers: 28)
Transportation Science     Full-text available via subscription   (Followers: 26)
European Transport Research Review     Open Access   (Followers: 22)
Journal of Transport Geography     Hybrid Journal   (Followers: 22)
Nonlinear Dynamics     Hybrid Journal   (Followers: 19)
Public Transport     Hybrid Journal   (Followers: 18)
International Journal of Sustainable Transportation     Hybrid Journal   (Followers: 18)
Cities in the 21st Century     Open Access   (Followers: 17)
Open Journal of Safety Science and Technology     Open Access   (Followers: 16)
Transportation Journal     Full-text available via subscription   (Followers: 16)
Economics of Transportation     Partially Free   (Followers: 16)
Transport     Open Access   (Followers: 16)
Journal of Transportation Technologies     Open Access   (Followers: 13)
International Journal of Intelligent Transportation Systems Research     Hybrid Journal   (Followers: 13)
IET Electrical Systems in Transportation     Open Access   (Followers: 13)
Case Studies on Transport Policy     Hybrid Journal   (Followers: 13)
Journal of Advanced Transportation     Hybrid Journal   (Followers: 12)
International Journal of Traffic and Transportation Engineering     Open Access   (Followers: 12)
Journal of Transport & Health     Hybrid Journal   (Followers: 12)
Journal of Supply Chain Management Science (JSCMS)     Open Access   (Followers: 12)
Journal of Transport History     Hybrid Journal   (Followers: 12)
EURO Journal of Transportation and Logistics     Open Access   (Followers: 12)
Sport, Education and Society     Hybrid Journal   (Followers: 12)
Transport Reviews: A Transnational Transdisciplinary Journal     Hybrid Journal   (Followers: 11)
Modern Transportation     Open Access   (Followers: 11)
European Journal of Transport and Infrastructure Research (EJTIR)     Open Access   (Followers: 11)
IET Intelligent Transport Systems     Open Access   (Followers: 11)
International Journal of Physical Distribution & Logistics Management     Hybrid Journal   (Followers: 11)
Proceedings of the Institution of Mechanical Engineers Part F: Journal of Rail and Rapid Transit     Hybrid Journal   (Followers: 11)
Journal of Sport & Social Issues     Hybrid Journal   (Followers: 10)
International Journal of Crashworthiness     Hybrid Journal   (Followers: 10)
Journal of Transportation Safety & Security     Hybrid Journal   (Followers: 9)
International Journal of Transportation Science and Technology     Open Access   (Followers: 9)
Travel Behaviour and Society     Full-text available via subscription   (Followers: 9)
Journal of Transport and Supply Chain Management     Open Access   (Followers: 9)
International Journal of Mobile Communications     Hybrid Journal   (Followers: 8)
Pervasive and Mobile Computing     Hybrid Journal   (Followers: 8)
Transportation Infrastructure Geotechnology     Hybrid Journal   (Followers: 8)
Analytic Methods in Accident Research     Hybrid Journal   (Followers: 8)
Transportmetrica A : Transport Science     Hybrid Journal   (Followers: 7)
IEEE Vehicular Technology Magazine     Full-text available via subscription   (Followers: 7)
International Journal of Electric and Hybrid Vehicles     Hybrid Journal   (Followers: 7)
Journal of Modern Transportation     Full-text available via subscription   (Followers: 7)
Mobility in History     Full-text available via subscription   (Followers: 7)
Journal of Waterway Port Coastal and Ocean Engineering     Full-text available via subscription   (Followers: 7)
International Journal of Heavy Vehicle Systems     Hybrid Journal   (Followers: 6)
Transportation Research Procedia     Open Access   (Followers: 6)
Journal of Mechatronics, Electrical Power, and Vehicular Technology     Open Access   (Followers: 6)
World Review of Intermodal Transportation Research     Hybrid Journal   (Followers: 5)
Applied Mobilities     Hybrid Journal   (Followers: 5)
International Journal of Applied Logistics     Full-text available via subscription   (Followers: 5)
Vehicular Communications     Full-text available via subscription   (Followers: 4)
Transactions on Transport Sciences     Open Access   (Followers: 4)
Journal of Traffic and Transportation Engineering (English Edition)     Open Access   (Followers: 4)
Transportation Letters : The International Journal of Transportation Research     Hybrid Journal   (Followers: 4)
IEEE Open Journal of Intelligent Transportation Systems     Open Access   (Followers: 4)
Research in Transportation Business and Management     Partially Free   (Followers: 4)
Logistics & Sustainable Transport     Open Access   (Followers: 4)
Transport and Telecommunication     Open Access   (Followers: 4)
Transport Problems     Open Access   (Followers: 4)
Journal of Transportation and Logistics     Open Access   (Followers: 3)
Journal of Transportation Security     Hybrid Journal   (Followers: 3)
World Electric Vehicle Journal     Open Access   (Followers: 3)
TRANSPORTES     Open Access   (Followers: 3)
International Journal of Transportation Engineering     Open Access   (Followers: 2)
Transportation Research Interdisciplinary Perspectives     Open Access   (Followers: 2)
Journal of Big Data Analytics in Transportation     Hybrid Journal   (Followers: 2)
Sport, Ethics and Philosophy     Hybrid Journal   (Followers: 2)
Journal of Public Transportation     Open Access   (Followers: 2)
Packaging, Transport, Storage & Security of Radioactive Material     Hybrid Journal   (Followers: 2)
Streetnotes     Open Access   (Followers: 2)
Travel Medicine and Infectious Disease     Hybrid Journal   (Followers: 2)
International Journal of Vehicle Systems Modelling and Testing     Hybrid Journal   (Followers: 2)
Les Dossiers du Grihl     Open Access   (Followers: 1)
International Journal of Ocean Systems Management     Hybrid Journal   (Followers: 1)
Transportation Engineering     Open Access   (Followers: 1)
Asian Transport Studies     Open Access   (Followers: 1)
Danish Journal of Transportation Research / Dansk Tidsskrift for Transportforskning     Open Access   (Followers: 1)
Transportation Safety and Environment     Open Access   (Followers: 1)
eTransportation     Open Access   (Followers: 1)
Synthesis Lectures on Mobile and Pervasive Computing     Full-text available via subscription   (Followers: 1)
Open Transportation Journal     Open Access   (Followers: 1)
Journal of Intelligent and Connected Vehicles     Open Access   (Followers: 1)
Emission Control Science and Technology     Hybrid Journal   (Followers: 1)
Botswana Journal of Technology     Full-text available via subscription   (Followers: 1)
Decision Making : Applications in Management and Engineering     Open Access   (Followers: 1)
Logistics     Open Access   (Followers: 1)
Recherche Transports Sécurité     Hybrid Journal   (Followers: 1)
International Journal of Services Technology and Management     Hybrid Journal   (Followers: 1)
Romanian Journal of Transport Infrastructure     Open Access   (Followers: 1)
Transportmetrica B : Transport Dynamics     Hybrid Journal   (Followers: 1)
Transportation Geotechnics     Full-text available via subscription   (Followers: 1)
Maritime Transport Research     Open Access  
Communications in Transportation Research     Open Access  
IET Smart Cities     Open Access  
Journal on Vehicle Routing Algorithms     Hybrid Journal  
Transportation in Developing Economies     Hybrid Journal  
Vehicles     Open Access  
Periodica Polytechnica Transportation Engineering     Open Access  
Transportation Systems and Technology     Open Access  
LOGI ? Scientific Journal on Transport and Logistics     Open Access  
Promet : Traffic &Transportation     Open Access  
IFAC-PapersOnLine     Open Access  
Revista Transporte y Territorio     Open Access  
Транспортні системи та технології перевезень     Open Access  
Geosystem Engineering     Hybrid Journal  
Logistique & Management     Hybrid Journal  
IATSS Research     Open Access  
Transport in Porous Media     Hybrid Journal  

           

Similar Journals
Journal Cover
Romanian Journal of Transport Infrastructure
Number of Followers: 1  

  This is an Open Access Journal Open Access journal
ISSN (Online) 2286-2218
Published by Sciendo Homepage  [370 journals]
  • Connections of Steel Girders with End Plates and Partially Prestressed
           Bolts

    • Abstract: The connections with end plates and bolts can be used in steel bridge structures, or joining the decking beams, which can lead to very simple and economical constructive solutions. The paper presents some theoretical aspects concerning the behavior and calculation of the end plate connections which is partially pre-tensioned by high-strength bolts, and supplementary a welded cover plate is added to the tensioned flange of the plate girder. In the case of connections subjected to tension forces, it is not recommended to prestress the bolts as much as is the case when the joints are subjected only to shear because live loads can lead to the overloading of the bolts; the overload is a function of the relative stiffness of the end plate and of the bolts. The additional welded splice at the tension flange contributes to the transfer of the large tension stresses from the extreme bolts to the welded cover plate, resulting in a significantly reduced joint assembly loading and an increased load-bearing capacity. The paper includes a numerical example highlighting the influence of the stiffness of the joint elements and of the welded splice-plate on the joint loading, considering its pre-tensioning effect from the cooling contraction of the longitudinal welding fillets.
      PubDate: Sat, 28 May 2022 00:00:00 GMT
       
  • Spatiotemporal Correlation Between Railway Transport Development and Land
           Use

    • Abstract: Rail transport developments seem to offer tremendous benefits to land use and spatial development. As the development of rail lines induces land use growth and development. However, the veracity of this claim remains unclear in the context of Nigeria rail resuscitation efforts. This research intends to examine the correlation between rail development and land use in Nigeria. The association between state population characteristics, rail line development, population density, and square kilometres is examined. The methodology comprises both qualitative and quantitative designs. The correlation coefficients are used to establish a relationship between the parameters used in the research. The study reveals that spatial development and land uses are greatly influenced by rail transportation infrastructure provision in the state with a rail line. The analysis reveals a positive relationship between rail line development and population density. Therefore, more investment and better management are needed to facilitate nationwide rail transportation links.
      PubDate: Sat, 28 May 2022 00:00:00 GMT
       
  • The Decision-Making Analysis on End-of-Life Vehicle Recycling Extending
           Producer Responsibility Policy in the Context of Remanufacturing

    • Abstract: For ensuring an ideal recycling rate, the extending producer responsibility (Extending Producer Responsibility) has been recognized by more and more governments. And an increasing number of original vehicle manufacturers (Original Vehicle Manufacturers) participated in their End-of-Life vehicles (End-of-Life Vehicles) reusing to fulfil their social responsibility. The Original Vehicle Manufacturers can do well in auto parts remanufacturing due to their knowledge and skills of vehicle manufacturing, and the third-party vehicle recyclers are more capable of recycling the End-of-Life Vehicles due to their skills and facilities of waste recycling. To better improve the End-of-Life Vehicle reusing businesses and improve the efficiency and quality of End-of-Life Vehicle recycling and remanufacturing, this research built a remanufacturing system with dual-cycle End-of-Life Vehicle recycling. Moreover, for the well operation of this system, the researchers established the game model between Original Vehicle Manufacturers and third-party recyclers with the government involved and analyzed this model with evolutionary game theory. This research found that there are two evolutionary stable strategies (ESS) for the two groups. For well operation of remanufacturing system with dual-cycle End-of-Life Vehicle recycling, the government need to use the Extending Producer Responsibility policy to impose strict restrictions on Original Vehicle Manufacturers doing End-of-Life Vehicle recycling through promoting Original Vehicle Manufacturers’ recycling quantity standard and the penalty for insufficient End-of-Life Vehicle recycling. Further, this research also found that the licensing fee that the third-party recycler needs to pay the Original Vehicle Manufacturer for getting the recycling business plays a vital role in the ESS.
      PubDate: Sat, 28 May 2022 00:00:00 GMT
       
  • Network of Dedicated Bus Lanes: A Solution to Increase the Accessibility
           of the Urban Intermodal Transport

    • Abstract: The public transport system has an essential role in the sustainability of the urban environment. The accessibility is one of the critical functions for the increase of public transport efficiency. In this framework, the paper presents a methodology to enhance the accessibility of the public transport network. The methodology aims to design a network of dedicated bus lanes to operate in areas with low accessibility and improve the connections to metro and tram lines that provide rapid and high-capacity services.
      PubDate: Sat, 28 May 2022 00:00:00 GMT
       
  • Considerations on Loads Transmitted By the Bridge Inspection Installation
           on Support Structures

    • Abstract: The inspection of bridges is an essential activity to maintain the viability and safe operation of these structures. The inspection process shall be carried out by visual means using special equipment called bridge inspector. The equipment is similar in design to mobile crane installations – crane lorries, with the rotating part in the form of a boom at the end of which is the work platform for personnel and tools. The structure of the arm has the shape of a lattice girder or beams with closed section (caisson); regardless of the type of construction there is at least one telescopable section. During use, the installation is positioned on the superstructure of the bridges, supporting it by means of folding or telescopic outriggers.Starting from the determination of the loads on the supports of a crane, loads necessary to ensure the stability, in the case study presented in the paper, the authors identify for bridge inspection equipment the value of the loads transmitted through the support system for different positions of the telescopic arm. These values are of interest when, due to space or omission, the outriggers of the installation are positioned on sidewalks or degraded structures and may cause loss of stability leading to technical damage (of the installation and the bridge) but also possible injuries to workers.
      PubDate: Sat, 28 May 2022 00:00:00 GMT
       
  • Investigation of the Effect of the Deck Material on the Cost in
           Cable-Stayed Bridges with Different Spans

    • Abstract: Recent developments in the social sphere also cause an increase in transportation activities. Increased transport activities lead to the construction of new roads and bridges. Different bridge construction systems are available to overcome large span obstacles. Cable-stayed bridges are more advantageous construction systems than other bridge type building carrier systems in overcoming large spans through suspension cables. Therefore, it is also widely preferred by designers. The biggest factor in the development of cable-stayed bridges is undoubtedly steel cables. Cable-stayed bridges are bridge structures that become lighter with the increase of the span, which has a more expanded flexibility, and that includes a cable system with the effect of nonlinear factors. Costs of cable-stayed bridges vary according to different spans. The span as well as the deck material used in the bridge system have a great effect on the cost. In cable-stayed bridge systems, decks are constructed of reinforced concrete and steel.The costs of cable-stayed bridges are widely discussed around the world; therefore, the effect of the span and deck material on the cost of cable-stayed bridges is being investigated. The main bearing elements of such bridges are cables, decks, and towers, and among these elements, the tower bridge carries all the weight of the bridge, even other external loads such as vehicle, wind, etc. In this study, the three-dimensional model of the cable, deck and tower elements that make up the cable-stayed bridge system was created and analysed using the CSI Bridge Program. The AASHTO LRFD Standards, which are widely used in the analysis of bridge systems with the CSI Bridge program and the design of bridge systems in the world, were used. In the study, the analysis and designs of cable-stayed bridges with reinforced concrete and steel deck at 250, 500, 750, 1000, 1500, 2000 meters span were carried out. The amount of materials and costs used in the analysis and design of the cable-stayed bridge systems were obtained and the results were interpreted.
      PubDate: Mon, 30 Aug 2021 00:00:00 GMT
       
  • Carbonation Resistance Classes of Concretes

    • Abstract: Concrete carbonation is a phenomenon that occurs by the penetration into the cement stone of CO2 present in the atmosphere. The phenomenon occurs in the presence of water in which CO2 dissolves, forming carbonate ions, which in turn react with calcium ions in the pores of the concrete, resulting in calcium carbonate (calcite). The diffusion of CO2 occurs through pores and surface defects, it thus penetrates deeper into the concrete and the carbonation reaction can occur at a greater depth, eventually exceeding the thickness of the cover, causing corrosion of the reinforcement. [1]In the case of reinforced concrete bridges, corrosion induced by carbonation of concrete is one of the main causes of degradation. Thus, in the design stage of the reinforced concrete bridge structures, the inevitable process of carbonation of the concrete must be taken into account, in the design of the durability, by calculating the thickness of the concrete cover layer.This article aims to present the concept of carbonation resistance class, which will be a major change in the standard based on which the thickness of the concrete cover for reinforcement will be determined. This presentation is made in the context of the European performance approach to durability. In this sense, an analysis of the experimental results obtained in research on concrete prepared with different types of cements, carried out in collaboration with the laboratory of the Reinforced Concrete Structures Department, within the Technical University of Civil Engineering Bucharest. Proposals for classification in the carbonation resistance classes for concretes prepared with two types of cements are also presented.
      PubDate: Mon, 30 Aug 2021 00:00:00 GMT
       
  • Static and Dynamic Structural Health Monitoring System for Bridges

    • Abstract: This document describes a system for static and dynamic monitoring of the structural health of bridges, but not only. The need to develop the system resulted from the difficulties encountered by the authors in installing and operating complex monitoring systems, composed of elements from different manufacturers, with different measurement technologies, power supplies, communication modes and software applications. The described system facilitates the integration of different measurements, sensors, power supplies and communication technologies, in a unitary system that allows both static and dynamic measurements, simultaneously.
      PubDate: Mon, 30 Aug 2021 00:00:00 GMT
       
  • Research on the Parameters Influencing the Numerical Analysis of the
           Fatigue Behaviour of a Forklift-ARM

    • Abstract: Estimating the remaining service life of a forklift for an objective reference is not only a requirement of the applicable legislation but also represents a challenge for specialized technical staff.It is well known that the first fatigue failure element of a forklift is its fork. A simulation using the SolidWorks suite and its result is presented in this article. It allows the identification of critical areas of fatigue failure.Based on the design of the subassembly and the loading scheme of the original product, the model under analysis with finite element was made on a 1: 1 scale. The filet areas also required a comparative analysis of the results obtained depending on the choice of mesh and discretization element.Starting from the mechanical properties of the material as well as the association with the characteristic fatigue yield curves (Wohler), a method for estimating the remaining service life of the structure is proposed. The aspect related to obtaining exact results without an excessive consumption of computing resources was also taken into account.
      PubDate: Mon, 30 Aug 2021 00:00:00 GMT
       
  • Effects of Coarse Aggregate Shape and Texture on Engineering Properties of
           Roller Compacted Concrete Prepared for High Traffic Routes

    • Abstract: Use of roller-compacted concrete in pavement construction is increasing. Roller compacted concrete is a zero-slump, highly compacted concrete that is placed by equipment similar to that used in asphalt pavement construction. This investigation was conducted to collect the state-of-the-art information on effects of coarse aggregate size and texture on the strength and workability of roller-compacted concrete (RCC) for pavement construction and maintenance. Concrete specimens containing cubical and rough coarse aggregate, irregular and rough coarse aggregate, angular and rough coarse aggregate, rounded/spherical and smooth coarse aggregate, and flaky/elongated and rough coarse aggregate were prepared at 1:3:3 concrete mix ratio and 0.4 water cement ratio. Laboratory testing of specimens derived from the concrete specimens showed excellent results for cubical and rough coarse aggregate, irregular and rough coarse aggregate, and angular and rough coarse aggregate. Specimens from the rounded/spherical and smooth coarse aggregate, and flaky/elongated and rough coarse aggregate performed poorly in laboratory. The study therefore recommends the use of cubical and rough coarse aggregate, and irregular and rough coarse aggregate in the production of roller-compacted concrete for pavement construction and maintenance.
      PubDate: Mon, 30 Aug 2021 00:00:00 GMT
       
  • Characterization of Coconut Shell Ash and Eggshell Powder as Supplementary
           Cementitious Materials in Roller Compacted Concrete Industrial Access
           Pavements and Parking Facilities

    • Abstract: The cost of cement used in concrete works is on the increase and unaffordable, yet the need for hydraulic cement concrete and other cement concrete based infrastructures keeps growing with increasing population, thus the need to find alternative binding materials that can be used solely or in partial replacement of cement. The use of waste materials with pozzolanic properties in concrete production is a becoming a worldwide practice. The assessment of the pozzolanic activity of cement replacement materials is becoming increasingly important because of the need for more sustainable cementing products. In this study, a mixture of coconut shell ash and eggshell powder is used as partial replacement of hydraulic cement in ranges of 0%, 5%, 10%, 15%, and 20%. The concrete specimens were prepared at 1: 3: 2.5 mix ratio of cementitious material, fine aggregate and coarse aggregate. The mix ratio satisfied the minimum cement content of 148.32kg/m3 (250Ib/yd3) and the minimum cementitious material content of 267 kg/m3 (450Ib/yd3) for roller compacted concrete pavement. The compressive strength, splitting tensile strength and flexural strength tests were carried out to assess the strength characteristics of ternary concrete mixture containing coconut shell ash and eggshell powder and the feasibility of using coconut shell ash and eggshell powder as partial replacement of cement in industrial plant access concrete roads and parking lots. The results indicate that a mixture of coconut shell ash and eggshell powder can be used up to 20% by weight for replacement of cement in roller compacted industrial plant access concrete roads and parking lots.
      PubDate: Mon, 30 Aug 2021 00:00:00 GMT
       
  • Accelerated Laboratory Testing for Reflective Cracking

    • Abstract: One of the most used methods of rehabilitation of road structures is the laying of a protective asphalt layer over a degraded concrete. The main problem of this solution is the reflective cracking, more precisely the transmission of the existing cracks in the lower layer in the asphalt pavement.The method presented in this article involves an accelerated laboratory test on specimens composed of a pre-cracked concrete slab over which an asphalt slab is glued, subjected to equivalent traffic loads. This test allows the observation of the crack propagation from the lower layer to the upper layer, until it yields, through parameters such as deformed specimen, opening and length of the crack in asphalt, but also the opening of the existing crack in concrete, relative to the number of cycles.By relating these parameters, important conclusions can be drawn about the behavior of the composite structure at reflective cracking, being able to choose the optimal recipe of the protective asphalt layer.
      PubDate: Mon, 30 Aug 2021 00:00:00 GMT
       
  • Vertical Interaction Between a Driving Wheelset and Track in the Presence
           of the Rolling Surfaces Harmonic Irregularities

    • Abstract: The driving wheelset is used in railway traction (locomotives, electric trains, trams, etc.) to support part of the weight of the suspended mass and to drive and brake the vehicle. The dynamics of the driving wheelset/track system is a very important issue in the railway engineering, and this paper is focused on basic features of the frequency response functions which describe the dynamic behavior in the presence of the rolling surfaces harmonic irregularities. To this end, a simple model of the driving wheelset/track system with the range of application limited up to 6-700 Hz is adopted. The driving wheelset model consists of a free-free uniform Euler-Bernoulli beam with three attached rigid bodies, representing the axle, the two wheels and the gear; the distinct feature of this model is the inertial asymmetry. Two independent infinite uniform Euler-Bernoulli beams, each on its foundation including two elastic layers for rail pad and ballast and an intermediate inertial layer for sleepers represent the track model. For simplicity, the moving irregularity model is applied to simulate the interaction between wheels and rails. Numerical simulations show that the driving wheelset/track system has three resonance frequencies, all situated in the frequency range of the evanescent waves in rails. FRF of the driving wheelset/track system have been calculated for left and right wheel/rail pair. The influence of the asymmetric inertia of the driving wheelset and the out of phase between the rolling surface irregularities are evaluated in terms of frequency response functions of the wheel/rail contact force.
      PubDate: Fri, 29 Jan 2021 00:00:00 GMT
       
  • Sustainable Urban Transport on Three Wheels

    • Abstract: Many of our global warming problems come from transport. The majority of people who need transport the most in the developing world are too poor to pay for the highest-technology vehicles which are not polluting. In the past 10 years, 3-6-passenger, battery-powered, Small Electric Passenger Vehicles (as this article is calling them, SEPVs) have appeared in major cities in the developing world. These slow, relatively safe, easily maneuverable, non-polluting and low-cost vehicles, on their three little wheels, are cutting the size of the world’s transport carbon footprint. Recognize that this paper is only focused on carbon footprint: carbon emissions. It is not about “pollution in general” or “emissions in general”. No other published article has explicitly considered the potential of the SEPV to contribute in reducing a nation's contribution to carbon footprint and thus to global warming. This article makes the case for building urban transport strategy and policy around such vehicles, in developing countries, in order to lower the countries' carbon footprint: that is its original contribution. The data showed that the SEPVs made a significant contribution to reducing the potential carbon footprint of transport in the small city of Cox’s Bazar, in Bangladesh, proportionate to its population. The inference is that SEPVs could reduce the carbon footprint of the nation if they become a major, integrated part of urban transport in the megacities, which creates most of the country's carbon footprint. Other developing countries should study Cox's Bazar's example. India is already ahead of the game.
      PubDate: Fri, 29 Jan 2021 00:00:00 GMT
       
  • Special-Purpose River-Port Sediment Valorization as Road Construction
           Material Emphasising Environmental Aspects

    • Abstract: Special-purpose river port sediment was investigated for its potential use as a road construction material. Sediment samples were extracted from three locations in three small river ports, and detailed laboratory research was conducted to determine its basic mechanical properties and characteristics that can potentially have an adverse influence in a roadside environment. The results of the research conducted indicate that there is a need for systematic monitoring of the quality and quantity of sediment in special-purpose river ports of the Danube River Basin to maintain its mobility and prevent flooding. The basic engineering characteristics (Proctor elements, Atterberg limits, California bearing ratio, and unconfined compressive strength) determined represent the good potential of the sediment samples tested herein for use in road construction. In addition, the chemical characteristics tested indicate the need for detailed analyses of the potential environmental risk before application in civil engineering structures
      PubDate: Fri, 29 Jan 2021 00:00:00 GMT
       
  • Residents’ Willingness to Adopt Cycling as Intra-City Transport in
           Calabar, Nigeria

    • Abstract: This study investigated the willingness of residents to use bicycles for intra-city transportation in Calabar, South-South Nigeria. Administered questionnaires were successfully retrieved (82%) from residents of all income and employment groups in the 22 political wards of the study area. Stratified sampling technique was used to select survey participants. Initial socioeconomic characteristics of respondents in intercept only model was used to predict the willingness of respondents to ride in the city. Twelve problems of bicycle transportation were further presented to participants who rated them using a six-point scale (1-6), highly unwilling to highly willing to ride, respectively. Logistic Regression Analysis was employed to predict the probability that a respondent would be willing to ride. The predictor variables were respondents’ gender, age, education, occupational status, 12 bicycle infrastructure characteristics and dummy variables coding each socioeconomic scenario. A test of the full model versus a model with intercept only was statistically significant, χ2 (24, N = 315) = 50.5, p < .001 and χ2 (19, N = 315) = 36.5, p < .001. The model was able to correctly classify 86% of those willing to ride and 29.1% of those unwilling to ride, for an overall success rate of 66.2%. The study revealed that there is no gender sensitivity in the willingness of residents to ride in the city. In model 2, the odd ratio of some bicycle infrastructure characteristics such as bicycle lanes (1.181), conflicts with motorist (1.338), lack of respect for cycling (1.078), culture/stigma (1.046), weather (1.013), potholes (1.222), safety issues (1.280), and illumination (1.241) are more significant in predicting the probability of respondents to ride bicycles. The study recommended designated bicycle paths/trails to motivate residents to ride bicycles in the city.
      PubDate: Fri, 29 Jan 2021 00:00:00 GMT
       
  • Freeze/Thaw Resistance Classes of Concretes

    • Abstract: The freeze/thaw phenomenon is of interest for the field of transport infrastructure through the degradations it produces in the structure of construction elements. The climatic specificity of Romania on the one hand and the exposure to aggressive environments of construction elements in transport on the other hand, determine the importance of studying this phenomenon, its mode of action/propagation and also prevention and maintenance to ensure the functionality of buildings in transport infrastructure.Currently, in the Romanian regulations [*], the assurance of sustainability is done, as in most national annexes for the application of EN 206 [1] in Europe, by a descriptive approach (concrete “designed to last”) referring to (with mandatory status) a series of requirements of the concrete composition (water / cement ratio, minimum cement dosage, entrained air, freeze/thaw resistant aggregates, etc.) and to the compressive strength (concrete compressive strength class) in depending on the classification of the element in a certain exposure class “X”.The support of this descriptive national approach was based on the analysis of a large number of results obtained in a complex experimental program carried out by Technical University of Civil Engineering Bucharest, by analyzing the results obtained by laboratory tests on “candidate” cements and cements “reference” (having a good behavior and traditional use) as well as “in situ” tests/determinations on construction elements made with both categories of cements and maintained in specific environments.At European level, performance approaches to sustainability have made clear progress. The development of accelerated laboratory experimental methods, the establishment of performance criteria, classes of resistance to various environmental actions and the link between them and the classes of exposure to various environmental actions were the starting point for experimental research whose results will be presented in this article.Thus, in conjunction with these modern approaches, an analysis will be presented on the experimental results obtained in research on freeze/thaw resistance to different types of cements, carried out in collaboration with the laboratory of the Reinforced Concrete Structures Department, Technical University of Civil Engineering Bucharest and proposals for classification in different classes of freeze/thaw resistance.
      PubDate: Fri, 29 Jan 2021 00:00:00 GMT
       
 
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