Roundabouts in United States and other countries have been proved to be very successful, effective, and a safe traffic control treatment. Roundabouts in the context of regularly expected truck configuration have also ...Roundabouts in United States and other countries have been proved to be very successful, effective, and a safe traffic control treatment. Roundabouts in the context of regularly expected truck configuration have also been successful for effective roundabout designs;however, there are always some site specific issues for trucks accommodation at roundabouts. Therefore, there is a great need for an informational guide in the form of synthesis report for roundabout designs specific to unique trucking traffic activity. While there are not significant literatures and studies in this subject, there are few studies/reports spread out which address various issues in this subject area. This study attempts to synthesize the research and knowledge of truck accommodation at roundabouts by synthesizing various research studies, reports, and articles;various subject areas such as roundabout designs for trucking activity, roundabout designs and accommodation strategies for specialized trucking activity such as oversized trucks, truck safety at roundabouts, and motor carrier perspective of trucking at roundabouts have been analyzed and relevant knowledge has been synthesized. This synthesis can be useful o researchers, designers, planners, and decision makers to determine effective ways to address specific trucking related issues at a roundabout.展开更多
The trucking industry is a major force behind the United States （US） economy with approximately 750,000 interstate motor carriers. Trucks deliver 70% of all freight tonnage while 80% of U.S. communities receive good...The trucking industry is a major force behind the United States （US） economy with approximately 750,000 interstate motor carriers. Trucks deliver 70% of all freight tonnage while 80% of U.S. communities receive goods exclusively by truck. The motor carrier industry provides jobs, generating significant income and tax revenue, representing approximately 5% of U.S. GDP （gross domestic product）. Despite one of every 13 people employed in a trucking-related job, there is a significant driver shortage. The ATA （American Trucking Associations） currently projects a shortage of 20,000 to 25,000 drivers in the for-hire truckload market. Women are well positioned to address this shortage. In 2011, women represented 7% of total employment in the U.S. trucking industry. The purpose of this study was to identify truck design needs for women truck drivers. This research is significant due to limited data sources about truck design needs for women drivers. This study also contributes to the body of knowledge about women in the trucking industry. In response, a 33-question survey was developed using QualtricsTM survey software. In April, 2012, an electronic survey was distributed to 663 Women in Trucking Association members over a two-week period with a response rate of 18%. Results were separated into quantitative and qualitative data and analyzed accordingly. Adjustability was a central issue facing women truck drivers. Recommendations for seat design, side mirrors, steps, handrails, hydraulic hood lifters, and steering consoles will be presented. Limitations of the study and recommendations for future research will be discussed.展开更多
为分析危险品道路运输路径优化领域的研究态势,筛选2000—2021年Web of Science核心合集数据库和中国知网的文献数据,采用可视化文献分析软件CiteSpace分析国内、外危险品道路运输路径优化领域的科研合作现状、研究热点及演进趋势。结...为分析危险品道路运输路径优化领域的研究态势,筛选2000—2021年Web of Science核心合集数据库和中国知网的文献数据,采用可视化文献分析软件CiteSpace分析国内、外危险品道路运输路径优化领域的科研合作现状、研究热点及演进趋势。结果表明:在科研合作上,中、美等国家注重合作交流,我国在危险品道路运输路径优化领域的影响力弱于美国,高校间合作密切,非高校机构多进行独立研究,国内、外均形成合作较密切且具有一定影响力的科研团队,发文数量与质量均较高;研究热点包括危险品道路运输路径优化模型、求解算法及信息系统应用等3方面;从演进趋势看,国内、外的危险品道路运输路径优化领域的演进趋势较一致,但国内研究相对滞后。建议相关研究人员增进与跨国及机构间的交流与合作,优化模型指标体系,改进求解算法,加强与现代先进信息技术的融合应用。展开更多
文摘Roundabouts in United States and other countries have been proved to be very successful, effective, and a safe traffic control treatment. Roundabouts in the context of regularly expected truck configuration have also been successful for effective roundabout designs;however, there are always some site specific issues for trucks accommodation at roundabouts. Therefore, there is a great need for an informational guide in the form of synthesis report for roundabout designs specific to unique trucking traffic activity. While there are not significant literatures and studies in this subject, there are few studies/reports spread out which address various issues in this subject area. This study attempts to synthesize the research and knowledge of truck accommodation at roundabouts by synthesizing various research studies, reports, and articles;various subject areas such as roundabout designs for trucking activity, roundabout designs and accommodation strategies for specialized trucking activity such as oversized trucks, truck safety at roundabouts, and motor carrier perspective of trucking at roundabouts have been analyzed and relevant knowledge has been synthesized. This synthesis can be useful o researchers, designers, planners, and decision makers to determine effective ways to address specific trucking related issues at a roundabout.
文摘The trucking industry is a major force behind the United States （US） economy with approximately 750,000 interstate motor carriers. Trucks deliver 70% of all freight tonnage while 80% of U.S. communities receive goods exclusively by truck. The motor carrier industry provides jobs, generating significant income and tax revenue, representing approximately 5% of U.S. GDP （gross domestic product）. Despite one of every 13 people employed in a trucking-related job, there is a significant driver shortage. The ATA （American Trucking Associations） currently projects a shortage of 20,000 to 25,000 drivers in the for-hire truckload market. Women are well positioned to address this shortage. In 2011, women represented 7% of total employment in the U.S. trucking industry. The purpose of this study was to identify truck design needs for women truck drivers. This research is significant due to limited data sources about truck design needs for women drivers. This study also contributes to the body of knowledge about women in the trucking industry. In response, a 33-question survey was developed using QualtricsTM survey software. In April, 2012, an electronic survey was distributed to 663 Women in Trucking Association members over a two-week period with a response rate of 18%. Results were separated into quantitative and qualitative data and analyzed accordingly. Adjustability was a central issue facing women truck drivers. Recommendations for seat design, side mirrors, steps, handrails, hydraulic hood lifters, and steering consoles will be presented. Limitations of the study and recommendations for future research will be discussed.
文摘为分析危险品道路运输路径优化领域的研究态势,筛选2000—2021年Web of Science核心合集数据库和中国知网的文献数据,采用可视化文献分析软件CiteSpace分析国内、外危险品道路运输路径优化领域的科研合作现状、研究热点及演进趋势。结果表明:在科研合作上,中、美等国家注重合作交流,我国在危险品道路运输路径优化领域的影响力弱于美国,高校间合作密切,非高校机构多进行独立研究,国内、外均形成合作较密切且具有一定影响力的科研团队,发文数量与质量均较高;研究热点包括危险品道路运输路径优化模型、求解算法及信息系统应用等3方面;从演进趋势看,国内、外的危险品道路运输路径优化领域的演进趋势较一致,但国内研究相对滞后。建议相关研究人员增进与跨国及机构间的交流与合作,优化模型指标体系,改进求解算法,加强与现代先进信息技术的融合应用。
