Journal of the Transportation Research Forum最新文献_第9页

Modeling Fatigue-Induced Collision Relative Risk: Implications of Service Hours and Fatigue Management Policies on Transit Bus Operators in Florida 模拟疲劳引起的碰撞相对风险:服务时间和疲劳管理政策对佛罗里达州公交运营商的影响

Journal of the Transportation Research Forum Pub Date : 2013-03-01 DOI: 10.5399/OSU/JTRF.52.1.4145

Enock T. Mtoi, R. Moses, T. Sando

引用次数: 2

Correlation Analysis of Duty Cycle Effects on Exhaust Emissions and Fuel Economy 占空比对废气排放和燃油经济性影响的相关性分析

Journal of the Transportation Research Forum Pub Date : 2013-03-01 DOI: 10.5399/OSU/JTRF.52.1.4136

J. Tu, W. Wayne, M. Perhinschi

引用次数: 5

Introduction of Heavy Axle Loads by the North American Rail Industry 北美铁路工业引进重轴载

Journal of the Transportation Research Forum Pub Date : 2013-03-01 DOI: 10.22004/AG.ECON.206951

C. Martland

{"title":"Introduction of Heavy Axle Loads by the North American Rail Industry","authors":"C. Martland","doi":"10.22004/AG.ECON.206951","DOIUrl":"https://doi.org/10.22004/AG.ECON.206951","url":null,"abstract":"The Association of American Railroads (AAR) initiated the Heavy Axle Load (HAL) Research Program in 1988 in order to “provide guidance to the North American railroad industry about whether to increase axle loads and to determine the most economic payload consistent with safety” (Kalay and Martland 2001). The research demonstrated the technical feasibility and economic desirability of increasing axle loads and the ability of technology to mitigate the adverse effects of heavier loads. In 1991, the industry decided to accept cars with 286,000 lb. gross vehicle weight (286k GVW) in interchange service. Since then, more than 90% of all bulk equipment acquired has been rated for 286k GVW. By 2010, nearly 100% of coal traffic and 30% of general freight moved in 286k loads. Technological improvements resulting from the HAL research program have been critical in enabling the industry to reduce costs of 286k operations. Stronger materials, better designs, and improved maintenance techniques reduced life cycle costs for rail and other track components. Bridge costs did not increase as much as expected, because of technological developments and better understanding of their ability to withstand HAL loads. Net benefits of HAL operations to railroads, suppliers, and their customers were approximately $6 billion between 1994 and 2010. Annual net benefits exceeded $600 million in 2010. Benefits included reductions in equipment expense, more efficient operations, and increases in line capacity. Given the technological advances in railroad engineering over the past 20 years, further increases in GVW or loading density should now be considered.","PeriodicalId":405535,"journal":{"name":"Journal of the Transportation Research Forum","volume":"140 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123271050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 14

Modeling Injury Severity of Young Drivers Using Highway Crash Data from Kansas 使用堪萨斯州高速公路碰撞数据模拟年轻司机的伤害严重程度

Journal of the Transportation Research Forum Pub Date : 2013-03-01 DOI: 10.5399/OSU/JTRF.52.1.4148

N. Amarasingha, S. Dissanayake

引用次数: 7

Truck Use on Texas Toll Roads 德克萨斯州收费公路上的卡车使用情况

Journal of the Transportation Research Forum Pub Date : 2013-03-01 DOI: 10.5399/OSU/JTRF.52.1.4151

Dan P. K. Seedah, Joshua C. Muckelston, R. Harrison

引用次数: 5

Modeling Investments in County and Local Roads to Support Agricultural Logistics 支持农业物流的县域和地方道路投资模型

Journal of the Transportation Research Forum Pub Date : 2012-09-04 DOI: 10.5399/OSU/JTRF.50.2.2741

D. Tolliver, A. Dybing, Pan Lu, EunSu Lee

引用次数: 9

Border Zone Mass Transit Demand in Brownsville and Laredo 布朗斯维尔和拉雷多边境地区公共交通需求

Journal of the Transportation Research Forum Pub Date : 2012-09-04 DOI: 10.5399/OSU/JTRF.51.2.2906

T. Fullerton, A. Walke

引用次数: 1

Disappearance of American Wealth and Its Impact on Air Travel: An Empirical Investigation 美国财富的消失及其对航空旅行的影响:一项实证调查

Journal of the Transportation Research Forum Pub Date : 2012-09-04 DOI: 10.5399/OSU/JTRF.51.1.2816

D. Bhadra

{"title":"Disappearance of American Wealth and Its Impact on Air Travel: An Empirical Investigation","authors":"D. Bhadra","doi":"10.5399/OSU/JTRF.51.1.2816","DOIUrl":"https://doi.org/10.5399/OSU/JTRF.51.1.2816","url":null,"abstract":"Recently, the Federal Reserve reported that U.S. households net worth dropped by $17 trillion, a stunning 26% loss from the peak of the cycle to the bottom. The precipitous drop in home and stock prices that continued through the first quarter of 2009 accelerated the drop in household wealth. Meanwhile, U.S. air travel suffered tremendously. While the economy contracted by around 1% in 2008 and the first part of 2009, total domestic enplanement dropped more than 4% over its 2007 level. Gross domestic product (GDP) or some other measure of current income has been a good predictor of air travel in the past. While current income is considered to be a good proxy for current discretionary spending, of which air travel is only one small part, recent destruction of wealth has significantly reduced the average consumer’s traditional appetite for expenditure, including air travel. Interestingly, there is very little empirical analysis that establishes a link between wealth and air travel. The paper seeks to address this gap by asking and investigating two empirical questions: (a) Does wealth have any quantifiable impact on U.S. air travel, controlling for all other relevant variables such as current income, past wealth, fare, and credit availability? (b) What has been the quantitative impact of wealth loss on air travel? The paper finds that the household wealth loss of U.S. $17 trillion yielded a loss of air travel demand of 730,000 passengers; or a loss of revenue of $244 million. As household wealth improved during the last two years, air travel recovered. Some of the lost passenger demand has been recouped (435,000) but a complete wealth-induced recovery still seems to be far off. Results of this analysis are important for both understanding future transitions in U.S. air travel, and hence forecasting, and formulating policy responses that may be designed more narrowly and effectively.","PeriodicalId":405535,"journal":{"name":"Journal of the Transportation Research Forum","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2012-09-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116926038","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Intermodal Transportation: Moving Freight in a Global Economy 多式联运:在全球经济中运输货物

Journal of the Transportation Research Forum Pub Date : 2012-09-04 DOI: 10.5399/OSU/JTRF.51.1.2841

M. Boilé

引用次数: 13

Analysis of Bridge Deterioration Rates: A Case Study of the Northern Plains Region 桥梁老化率分析——以北方平原地区为例

Journal of the Transportation Research Forum Pub Date : 2012-09-04 DOI: 10.5399/OSU/JTRF.50.2.2736

D. Tolliver, Pan Lu

引用次数: 18