Modelling Risk Perceptions of Stakeholders in Public–Private Partnership Toll Road Contracts

This paper investigates the risk perceptions of key stakeholder groups typically involved in public–private partnership (PPP) toll roads. Risk perceptions have an important impact on these PPP schemes for investing in public infrastructure. However, the nature and extent of risk associated with the specification of a PPP contract that commits contracting parties to deliver on their obligations remain unclear. In the context of major transport infrastructure, such as a new toll road, the often‐cited key risk to investors is the traffic (and hence demand) risk. There are, however, other risks, including political risk and media risk, the latter often causing untold harm resulting in modifications to the planned infrastructure. This paper develops a method to capture evidence on how public sector and private sector partners involved in previous PPPs perceive the levels of risk associated with each risk attribute, as a way of identifying the ex ante risk setting brought to negotiations in PPP toll road investments. Using a sample of 101 experts with contract experience in 32 countries, we develop a stated choice experiment and estimate a discrete choice model to quantify a risk profile index (RPI) to capture the perceived (relative) influence of each dimension of risk, and then identify sources of systematic differences in the RPI as a way of understanding the influence of personal traits and contextual and contractual factors.     

加强农村公路养护管理工作的探讨

文章针对目前农村公路养护管理工作中普遍存在的问题,提出了设想和建议,并就如何加强农村公路养护管理工作进行了探讨。     

道路桥梁施工中高性能混凝土的应用探讨

随着科学技术的飞速发展,道路桥梁建设中的施工技术也在不断进步革新。利用高性能混凝土具有高耐久性、高工作性、高强度和高体积等良好品质铺设的高质量的道路和桥梁成为日后发展的趋势。近年来,高性能混凝土在道路桥梁工程中的应用日渐广泛,本文结合高性能混凝土自身的特点,对道路桥梁工程中高性能混凝土在道路桥梁建设中的应用问题进行了浅要分析。     

论中小城市道路工程施工质量管理模式

城市道路施工不同于公路建设,由于多在市区施工,必然受到交通、时间等限制,同时也要为城市居民生活作考虑,在紧促时间的限制下,往往导致城市道路出现质量问题,这就需要对城市道路工程施工质量问题进行严格把关,本文将着重分析、探讨中小城市道路施工的特点,以及如何确保中小城市道路工程的施工质量。     

Design and implementation of the Expanded Public Works Programme: Lessons from the Gundo Lashu labour-intensive programme

This article examines the design and implementation of the Expanded Public Works Programme, drawing from the lessons of the Gundo Lashu programme on labour-intensive construction in the road sector. The aim of the study was to examine major barriers to the design and implementation of the programme. The article is based on the analysis of data that were gathered from the Gundo Lashu programme. The data were collected using a structured questionnaire, face-to-face interviews with the project participants as well as reviewing key secondary data from the project documents. The study found that the projects under the Gundo Lashu programme have clearly demonstrated the importance of labour-intensive approaches, especially in the road sector. However, these projects were constrained by a wide range of challenges, ranging from a lack of community participation to poor product quality and inadequate planning for sustainable financing.     

脱贫与经济增长:"贵州新现象"探析——贵州云南两省的比较研究

经济增长通常意味着贫困率的下降,然而,对于增长很慢的经济体或经济增长没有带动贫困率降低的案例,这种假设似乎并不成立.中国两个较为贫困省份的数据展示了这样一个谜题:贵州省的经济增长缓慢但农村贫困率的下降较为显著,对这一现象不妨称之为"贵州新现象";与此同时,云南省经济高速增长但贫困率下降较为迟缓.根据相关考察和统计数据的分析,交通、流动人口、旅游业和矿产业四个因素是解释这个谜题的关键.这四个因素在两个省的不同分布和构造解释了它们经济增长与贫困率下降关系中的不平衡性.     

结核分枝杆菌诱导抗原提呈细胞Toll样受体表达差异性研究进展

该文结核分枝杆菌感染后,抗原提呈细胞表面Toll样受体(toll-like receptors,TLR)表达差异、抗原提呈细胞的增殖、分化以及相关信号通路作一阐述.     

沥青路面平整度控制

路面平整度是衡量高等级公路使用性能的一项重要指标。文章通过梧州至信都二级公路第5合同段、钦州至浦北二级公路第A合同段、环江至大沙坡二级公路第B合同段沥青路面施工实践,阐述沥青路面施工中平整度控制。     

How road improvement reduces poverty: the case of Laos

A general equilibrium modeling approach is used to study the effect that rural road improvement has on poverty incidence in Laos. Household survey data are used to distinguish three categories of rural villages according to their road access: (i) no vehicular access; (ii) dry season only access; and (iii) all weather access. A general equilibrium model of the Lao economy is then used to simulate, first, the effect of upgrading category (i) to category (ii) roads, and second, category (ii) to category (iii) roads. The former has a larger poverty‐reducing effect but is also more costly.     

The long and winding roads: Perceived quality of scenic tourism routes

This study aims to understand self-drive tourists’ satisfaction with and loyalty toward scenic roads. Building on previous studies in the context of tourism destinations, satisfaction is hypothesised to be influenced by leisure and holiday motorists’ motivation for driving the routes and the provision of roadside facilities. In turn, satisfaction is assumed to increase motorists’ loyalty toward the route. The study comprises data from two scenic roads in Norway that differ with respect to landscapes formations, settlements, experiences along the routes, and travel distance. Data are analysed using structural equation modelling. Results show that roadside facilities play a crucial role in achieving overall satisfaction and loyalty among motor tourists, and that route managers should improve the quality of these and related infrastructure facilities and services. Moreover, the study indicates that it is important to take into consideration the motorists’ desire to experience attractive sceneries in order to increase overall route satisfaction. Finally, satisfaction is demonstrated to significantly increase route loyalty, although this relationship appears weaker than in conventional destination studies.