低质心混凝土搅拌车设计原理与结构

低质心混凝土搅拌车的主要结构和特点。针对市场上大容量混凝土搅拌车质心高的结构特点,介绍了一种能改善整车行驶稳定性的     

高速公路改扩建作业区的合理布设

目前我国相关规范并没有对高速公路改扩建作业区的布设做出相应的规定,施工中的一些不合理设置大大降低了作业区的通行能力和运行效率,并且存在诸多安全隐患。针对这一问题,运用交通仿真技术对双向四车道高速公路基本路段的通行能力以及作业区各主要控制区段（如预告段、合流段等）的长度进行研究分析,得到高速公路改扩建期作业区的长度设置标准和布设要求,为今后高速公路改扩建工程作业区的设置提供参考。     

社会转型时期公路工会群众工作探索

文章基于社会转型时期河池公路管理局工会群众工作实际,分析了新时期公路工会群众工作中存在的问题,提出改进公路工会群众工作的对策与建议,以建设服务型、法治型、活力型工会,积极作为服务职工群众。     

编制国省道改建项目可研报告的几点心得体会

通过对近年来山东省国省道改建可研报告编制工作中常见问题及设计对策的总结,用工作实例提出了解决问题的思路和方法。     

Bayesian estimation of multinomial probit models of work trip choice

In this paper, we estimate a multinomial probit model of work trip mode choice in Seoul, Korea, using the Bayesian approach with Gibbs sampling. This method constructs a Markov chain Gibbs sampler that can be used to draw directly from the exact posterior distribution and perform finite sample likelihood inference. We estimate direct and cross-elasticities with respect to travel cost and the value of time. Our results show that travel demands are more sensitive to travel time than travel cost. The cross-elasticity results show that the bus has a greater substitute relation to the subway than the auto (and vice versa) and that an increase in the cost of an auto will increase the demand for bus transport more so than that of the subway.     

Non-commuters: the people who walk to work or work at home

The paper focuses on the socioeconomic characteristics of workers at home and those who walk to work and these are compared with commuters (those who travel to work by motorized transportation). Understanding of such characteristics of these people is useful for purposes of designing policies that encourage these forms of "travel" to work, if it is believed desirable for planning or environmental purposes. For example, subsidizing public transportation may also have an impact on the proclivity to work at home or walk to work. Using a large census data set for Israel, separate subsamples are analyzed for heads of household and for their spouses. Metropolitan areas as well as peripheral urbanized areas are analyzed separately. Logit analysis is used to identify those variables that affect the likelihood of different groups of people to walk to work or to work at home.It is shown that walkers to work tend to be lower-income, less-educated people with lower asset ownership rates. Females are overrepresented amongst them, while "high-status" professionals are underrepresented. Workers at home appear to be a more complex group. They tend to have higher levels of education and wealth than commuters, but earn less on average. They include proportionately more females. The likelihood of working at home increases with home size and with ownership of some durable goods. The workers at home may in fact be comprised of two or more differing groups with contrasting characteristics, one higher-income and higher-educated, the other with lower socio-economic indicators. Because they may be a heterogeneous group, development of planning policies to encourage non-vehicle commuting may require different policy tools for the different subgroups.     

Non‐compatible chemicals as cargoes in industry,on road,rail, and water

Toronto is to have an urban transit system with a passenger carrying capacity which fills the gap between the capacity of the subway and the capacity of the car and bus. Correspondingly, in the words of the Premier of Ontario, the system will “make possible an attractive alternative to high‐rise, high‐density living and urban sprawl. . . .” Furthermore, the new system is sufficiently economical to provide “. . . an encouragement to growth in appropriate areas, rather than merely responding to growth as it occurs . . .”

The decision to have such a system is the culmination of some years of major transportation activities in the Province, which included the Metropolitan Toronto and Region Transportation Study (MTARTS) of 1962. This study pursued both urban expressways and public transport solutions to the movement of people in Metropolitan Toronto.

The urban expressways programmes ran into difficulties, on environmental terms, when strong opposition from community groups was met on proposed routes. A climax came when the Ontario Government halted the construction of the controversial Spadina expressway in June 1971. However, the programmes of public transport solutions met with great success. The Toronto subway and its extensions, together with the change in land values along the route, has become a classic success story. So, too, has the introduction of the GO Train Service (Government of Ontario train service). This pioneered a combination of commuter rail service and integrated feeder buses and today replaces some 14,000 cars each day along the lakeshore highways.

The success of the subway and the GO train coupled with the difficulties experienced by the urban expressways programme, gave rise to the realisation that a better city through public transport rather than the car, was practicable. However, subways were too expensive and they needed a large patronage in a narrow corridor. Accordingly, an intermediate capacity transit system was sought.

The paper describes the programme of activities involved in the choice of the system and describes the technical specification which the system will enjoy. In particular, the demonstration installation which is to be set‐up in Toronto is described in detail, together with the plans to instal some 56 miles over five routes in Metropolitan Toronto.     

浅谈当前交调工作意义与存在的问题

交调工作是公路规划、建设的重要基础工作,详细地分析了交调工作的意义及河北省开展现状及存在的问题,并提出相应建议。     

IMO自愿审核机制下我国海事监管对策研究

国际海事组织（IM0）为了促进国际海上安全和海洋环境保护公约的有效实施,于2006年开始推行“IMO成员国自愿审核机制”。文中第一部分简要介绍了IMO自愿审核机制,分析了该机制的产生原因和运作过程;第二部分分析了该机制的实施可能给中国海事监管工作带来的影响;第三部分通过对自愿审核机制的认识,尝试性地提出我国海事主管机关应对自愿审核的对策性建议。     

如何做好施工技术管理工作

施工技术管理,是施工企业对各项技术活动和工作要素进行科学管理的总称,也是企业生产经营管理的重要组成部分。施工技术管理的好与坏,直接关系工程的安全质量,经济效益,关系到职工的切身利益,关系到企业的信誉、生存与发展。就中国铁建而言,施工技术管理分总部、集团公司、工程公司和项目经理部四级,施工技术管理存在的问题不少,内容也很多,但最关键的应把握图纸会审、施工技术方案,技术交底,施工测量,施工试验与检验、技术难题的攻关与处理、"四新"技术与BIM技术的研究与应用、技术资料的积累整理与归档等关键问题。企业各级管理人员与技术人员必须充分认识技术管理的重要性,从而从建立技术管理制度到建筑产品的建成,形成一套完整的技术管理链。