Horizontal and Vertical Curvature and its Effects on Driver Passing Choice

2019 ◽  
Vol 2673 (2) ◽  
pp. 734-742
Author(s):  
Regan Hansen ◽  
Kevin Chang
Keyword(s):  
Simulation Experiment ◽  
Highway Safety ◽  
Gap Acceptance ◽  
Highway Design ◽  
The Road ◽  
Traffic Lane ◽  
Oncoming Vehicle ◽  
The Right ◽  
Horizontal Curvature ◽  
Practical Implications

Passing maneuvers on rural two-lane highways require drivers to enter the opposing traffic lane to overtake an impeding vehicle. A successful maneuver requires the driver to correctly judge the time it will take to complete the pass, and the distance to and speed of the oncoming vehicle. Previous studies have shown that the type and speed of impeding vehicle, traffic volume, roadway cross-section, and driver characteristics influence gap-acceptance behavior, but have not considered vertical curvature or specified directionality in the horizontal curvature. This paper describes a driving simulation experiment in which these geometric, situational, and driver characteristic variables were collected for 643 passing attempts. A logistic regression model was developed to infer the effects of horizontal and vertical curvature on driver passing decisions. This study uniquely quantified that drivers were: more likely to pass if the road curved to the left than if it was straight and less likely to pass if the road curved to the right; more likely to pass if there was a sag curve than if the road was flat and less likely to pass if there was a crest curve; and less likely to pass when traveling uphill than if the road was level. As the influence of roadway geometry on gap-acceptance decisions is not currently implemented in overtaking models, the results of this study have practical implications for microsimulation of rural two-lane highways, highway design, and highway safety, and the inclusion of roadway geometry variables may improve future modeling of roadway capacity and passing locations along two-lane highways.

A New Highway Safety Model Based on Cellular Automata

2014 ◽  
Vol 989-994 ◽  
pp. 2340-2343
Author(s):  
Li Xing Li
Keyword(s):  
Cellular Automata ◽  
Energy Conservation ◽  
Traffic Safety ◽  
Conservation Law ◽  
Highway Safety ◽  
Traffic Density ◽  
New Model ◽  
The Road ◽  
The Right ◽  
Energy Conservation Law

With the growth of the total mileage of highway. There is great importance in studying highway safety. At the present time, there are little research on traffic safety with the consideration of the Keep-Right-Except-To-Pass Rule, which requires drivers to drive in the right-most lane unless they are passing another vehicle. Based on Cellular Automata, this paper constructs a new model of highway safety with the consideration of the particular Rule. To evaluate the safety of the road, the model proposes a new index based on energy conservation law. After the simulation, the result shows the best traffic density to balance the safety and traffic flux is 20.1133veh/km.

scholarly journals Pendekatan Antrhopometry Tinggi Penglihatan Mata Sebagai Dasar Ukuran Redesain Median Jalan (Studi Kasus Jalan Diponegoro Simpang Gili Tugel)

2018 ◽  
Vol 5 (1) ◽  
pp. 28-38
Author(s):  
Ali Mushoffan ◽  
Tri Susila Hidayati
Keyword(s):  
Opposite Direction ◽  
Human Body ◽  
High Dimensional Data ◽  
High Dimensional ◽  
Main Function ◽  
Physical Separation ◽  
Safety Standards ◽  
The Road ◽  
Traffic Lane ◽  
The Right

The road median is a physical separation of the traffic lane that serves to eliminate traffic conflictsfrom the opposite direction, which in turn will improve the safety of traffic. road infrastructure factorsthat do not meet safety standards. An example is due to the manufacture of a median road at eachintersection that does not meet such standards as too wide and too high such as in the tegal city ofDiponegoro, this indicates reduced main function of the median road, Antrhopometry is anapproximation of the size of the human body. In this study discusses how to make the mediandesign does not eliminate the main function of traffic separator traffic by using antrhopometry. Thedata used are high-dimensional data of sight and median dimension size, looking forstandardeviation as the lowest value of high vision value to find the right value as a redesignracetrack.

Observations on the Provenance of the Thames Valley Pick, Swalecliffe, Kent

1926 ◽  
Vol 5 (2) ◽  
pp. 224-230 ◽  
Author(s):  
F. H. Worsfold
Keyword(s):  
Subject Matter ◽  
Sloping Ground ◽  
Relative Age ◽  
Treasure Trove ◽  
The Road ◽  
University College London ◽  
Exact Position ◽  
The Subject ◽  
London Clay ◽  
The Right

From the Marine Parade, Tankerton, Whitstable, looking East, one obtains a capital view of Tankerton Bay, Swalecliffe, in which my discoveries have been made which are to form the subject matter of this paper. The grassy cliff at Priest and Sow corner at the end of the road stands at 55 O.D. This height gradually declining round the arc of the bay, to die out entirely in the Long Rock occupying the middle distance and through which the Swalecliffe Brook discharges into the sea. Just beyond, a little to the right, are the disused Swalecliffe Brick Works, with Stud Hill and Hampton lying further back. To the left and edging the horizon, Herne Bay Pier is clearly discernable. The accompanying copy of (Plate I.) the 25-in. Ordnance map of this Tankerton Bay section gives the exact position of the 650 yards from the Parish Boundary Stone eastwards indicated thereon with a X in which are found the gravels and brick-earths which have proved so rich in archaeological treasure trove. The whole of this south-easterly directioned well-drained gently sloping ground, from the Priest and Sow corner to the Swalecliffe brook, forms an ideal camping site. Last April a paper was read by me before the Geological Association, at University College, London, entitled “An Examination of the Contents of the Brick Earths and Gravels of Tankerton Bay, Swalecliffe, Kent,” in which the geological aspect of this section was fairly exhaustively treated, so that in this particular it will be unnecessary for me to do more than give a brief summary of the results of that examination as to the relative age and stratigraphical sequence of the Drift material found here overlying the London Clay.

Determination of Resistance to Abrasive Wear. VIII. Influence of Softeners in Tests with the Akron-Croydon and Du Pont Machines

1949 ◽  
Vol 22 (1) ◽  
pp. 259-262
Author(s):  
J. F. Morley
Keyword(s):  
Unit Area ◽  
Published Data ◽  
The Road ◽  
Abrasive Surface ◽  
Abrasive Power ◽  
The Difference ◽  
On The Road ◽  
The Right ◽  
Abrasion Testing

Abstract These experiments indicate that softeners can influence abrasion resistance, as measured by laboratory machines, in some manner other than by altering the stress-strain properties of the rubber. One possible explanation is that the softener acts as a lubricant to the abrasive surface. Since this surface, in laboratory abrasion-testing machines, is relatively small, and comes repeatedly into contact with the rubber under test, it seems possible that it may become coated with a thin layer of softener that reduces its abrasive power. It would be interesting in this connection to try an abrasive machine in which a long continuous strip of abrasive material was used, no part of it being used more than once, so as to eliminate or minimize this lubricating effect. The fact that the effect of the softener is more pronounced on the du Pont than on the Akron-Croydon machine lends support to the lubrication hypothesis, because on the former machine the rate of wear per unit area of abrasive is much greater. Thus in the present tests the volume of rubber abraded per hr. per sq. cm. of abrasive surface ranges from 0.03 to 0.11 cc. on the du Pont machine and from 0.0035 to 0.0045 cc. on the Akron-Croydon machine. On the other hand, if the softener acts as a lubricant, it would be expected to reduce considerably the friction between the abrasive and the rubber and hence the energy used in dragging the rubber over the abrasive surface. The energy figures given in the right-hand columns of Tables 1 and 3, however, show that there is relatively little variation between the different rubbers. As a test of the lubrication hypothesis, it would be of interest to vary the conditions of test so that approximately the same amount of rubber per unit area of abrasive is abraded in a given time on both machines; this should show whether the phenomena observed under the present test conditions are due solely to the difference in rate of wear or to an inherent difference in the type of wear on the two machines. This could most conveniently be done by considerably reducing the load on the du Pont machine. In the original work on this machine the load was standardized at 8 pounds, but no figures are quoted to show how abrasion loss varies with the load. As an addition to the present investigation, it is proposed to examine the effect of this variation with special reference to rubbers containing various amounts and types of softener. Published data on the influence of softeners on the road wear of tire rubbers do not indicate anything like such large effects as are shown by the du Pont machine. This throws some doubt on the value of this machine for testing tire tread rubbers, a conclusion which is confirmed by information obtained from other workers.

In quest of goldilocks ranges in searching for information on the web

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Anna Matysek ◽  
Jacek Tomaszczyk
Keyword(s):  
Information Search ◽  
Design Methodology ◽  
Search Task ◽  
Web Searching ◽  
Content Type ◽  
Scientific Disciplines ◽  
Preliminary Study ◽  
The Right ◽  
User Experiment ◽  
Practical Implications

PurposeThe quest to discover optimal conditions or amounts has been carried out in many scientific disciplines and practical fields. In astrophysics, biology, medicine, psychology and education, the quest has resulted in finding the right amount of something, a desirable middle between extremes, a balance between conditions or the optimal state of a system. The results are referred to as the Goldilocks principle, which is based on the idea of being “just right”. The aim of our study was to find out if there are any measures in information search that could be identified as Goldilocks ranges.Design/methodology/approachWe conducted a user experiment in which 68 participants carried out a time-unlimited, topical search task involving finding relevant websites on the basis of which the participants were supposed to prepare a presentation on a given topic. We examined aspects of their search behavior.FindingsWe found that information search Goldilocks ranges can be identified for a length of a search session, number of relevant results, number of queries submitted and number of search engine results pages (SERPs) visited. This preliminary study has resulted in indicating the following dominant ranges: Number of relevant documents found: 5–8; Time spent searching: 21–35 min; Number of queries submitted: 3–7; Number of SERPs viewed: 1–3.Originality/valueTill now, no one has studied Goldilocks ranges in information retrieval. The Goldilocks ranges have some practical implications for improving the effectiveness of web searching.

Sending all the right signals: can locally sensitive employer branding address the global integration-local responsiveness problem?

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Keyword(s):  
Case Studies ◽  
Design Methodology ◽  
Reading Time ◽  
Employee Voice ◽  
Global Integration ◽  
Employer Branding ◽  
Content Type ◽  
Pertinent Information ◽  
The Right ◽  
Practical Implications

Purpose This paper aims to review the latest management developments across the globe and pinpoint practical implications from cutting-edge research and case studies. Design/methodology/approach This briefing is prepared by an independent writer who adds their own impartial comments and places the articles in context. Findings The study uses two case studies to explore the integration-responsiveness problem in multi-national enterprises and finds that locally sensitive employer branding and facilitating employee voice can help mitigate global-local tensions in religiously sensitive environments. Originality/value The briefing saves busy executives and researchers hours of reading time by selecting only the very best, most pertinent information and presenting it in a condensed and easy-to-digest format.

An Introduction to Global Health Delivery

2021 ◽  
Author(s):  
Joia Mukherjee ◽  
Paul Farmer
Keyword(s):  
Health Care ◽  
Global Health ◽  
Access To Health Care ◽  
Right To Health ◽  
Treatment Access ◽  
The Road ◽  
Health Delivery ◽  
Positive Side ◽  
Access To Health ◽  
The Right

What has called so many young people to the field of global health is the passion to be a force for change, to work on the positive side of globalization, and to be part of a movement for human rights. This passion stems from the knowledge that the world is not OK. Impoverished people are suffering and dying from treatable diseases, while the wealthy live well into their 80s and 90s. These disparities exist between and within countries. COVID-19 has further demonstrated the need for global equity and our mutual interdependence. Yet the road to health equity is long. People living in countries and communities marred by slavery, colonialism, resource extraction, and neoliberal market policies have markedly less access to health care than the wealthy. Developing equitable health systems requires understanding the history and political economy of communities and countries and working to adequately resource health delivery. Equitable health care also requires strong advocacy for the right to health. In fact, the current era in global health was sparked by advocacy—the activist movement for AIDS treatment access, for the universality of the right to health and to a share of scientific advancement. The same advocacy is needed now as vaccines and treatments are developed for COVID-19. This book centers global health in principles of equity and social justice and positions global health as a field to fulfill the universal right to health.

scholarly journals Valarie Zeithaml: autobiographical reflections

2017 ◽  
Vol 9 (3) ◽  
pp. 264-276 ◽  
Author(s):  
Valarie A. Zeithaml
Keyword(s):  
Personal Development ◽  
Design Methodology ◽  
Chronological Order ◽  
Career Trajectory ◽  
Content Type ◽  
Look Back ◽  
The Subject ◽  
Research Philosophy ◽  
The Right ◽  
Practical Implications

Purpose By examining my personal development and career trajectory, I hope to share some insights into life as an academic. My particular path has contained, as most paths do, twists and turns. As I look back, they all seem somehow related to each other, but they were not all planned. Design/methodology/approach I will discuss my life and career in chronological order, then reflect on my career and research philosophy. I will also discuss several of my most cited articles and how they emerged. Findings I emphasize research that is both academically rigorous and relevant to business. I also show that passion for a subject, even one that is risky and not encouraged by others, has resulted in lifelong interest and inspiration for me. While not appropriate for all because of the risk, I found it worth taking a chance, largely because I was highly inspired by the subject. Practical implications Research that is programmatic has benefits because it allows a scholar to own an area. Also, working with the right co-author teams – sometimes ones where different talents are distributed across the team is effective. Originality/value The story and opinions are mine alone.

To risk or not to risk

2016 ◽  
Vol 32 (8) ◽  
pp. 12-14
Keyword(s):  
Case Studies ◽  
Design Methodology ◽  
Reading Time ◽  
Cutting Edge ◽  
Stressful Event ◽  
Content Type ◽  
Private Lives ◽  
Pertinent Information ◽  
The Right ◽  
Practical Implications

Purpose This paper aims to review the latest management developments across the globe and pinpoint practical implications from cutting-edge research and case studies. Design/methodology/approach This briefing is prepared by an independent writer who adds their own impartial comments and places the articles in context. Findings It is said that the most stressful event in our lives is moving house. The risk of the whole project falling through; the sheer scale of planning and coordination required; the emotional highs and lows of the success or failure in finding the right home to move to. Certainly, there are few activities that adults go through that guarantee such a levels of anxiety. And if this is the case for our private lives, then what is the equivalent of our business lives? Implications The paper provides strategic insights and practical thinking that have influenced some of the world’s leading organizations. Originality/value The briefing saves busy executives and researchers hours of reading time by selecting only the very best, most pertinent information and presenting it in a condensed and easy-to-digest format.

scholarly journals Characterisation of cyclists’ willingness to pay for green initiatives at Africa’s largest cycle tour

2016 ◽  
Vol 19 (3) ◽  
pp. 432-439
Author(s):  
Melville Saayman ◽  
Waldo Krugell ◽  
Andrea Saayman
Keyword(s):  
Willingness To Pay ◽  
Carbon Footprint ◽  
Climate Change Mitigation ◽  
Demographic Variables ◽  
The Road ◽  
Road Cycling ◽  
Different Types ◽  
On The Road ◽  
The Right ◽  
Change Mitigation

The Cape Argus Pick n Pay Cycle Tour is a major event on the road cycling calendar. The majority of cyclists travel significant distances and participation produces a substantial carbon footprint. This paper examines participants’ willingness to pay to offset their carbon footprint. The purpose of this paper is to make a contribution to the literature by linking willingness to pay to attitudes towards or beliefs (green views) about the initiatives in place, to ensure a greener cycle tour. Factor analysis is used to identify different types of cyclists, based on their green views: those with green money, those who prefer green products and the “re-cyclers”. The results of the regression analysis reveal that socio-demographic variables and the right attitude towards the environment are significant predictors of stated willingness to pay for climate change mitigation.

Sign in / Sign up

Export Citation Format

Share Document