Commute responses to employment decentralization: Anticipated versus actual mode choice behaviors of new town employees in Kunming,China

This study examines workers’ mode-choice responses to a typical job decentralization policy implemented in China’s urban development – government job relocation (GJR) to new towns in the urban periphery. Broadly, the literature suggests that job decentralization tends to increase car commuting; however, little is known about the effects of China’s GJR initiatives on individuals’ commuting mode choices. Using Kunming as a case study, this study examines how workers’ commuting mode choices have shifted in response to the GJR policy. Our study analyzes two travel survey datasets that span the job relocation process: (1) stated preference (SP) data on workers’ anticipated mode choices after a move of workplace to a planned new town; and (2) revealed preference (RP) data on workers’ actual choices of commuting mode after their jobs were moved. The findings suggest that after job relocation, workers’ actual commuting modes shift from more sustainable modes towards cars. The determinants of workers’ mode choices differ substantially between the hypothetical and actual setting of job relocation. The anticipated mode choices are largely determined by socio-demographic characteristics whereas the actual mode choices are strongly influenced by travel time and housing locations. The evidence from this study offers two important implications for future planning practice of job decentralization. First, planners and policy-makers should be skeptical about the transportation benefits of job decentralization. Second, while SP surveys can assist planners to predict individuals’ mode-choice responses, the robustness of SP results should be carefully assessed before translating into the evidence base for informing job decentralization policy-makings.     

空心板桥新旧板间的新连接设计方法及应用

文章针对目前公路中空心板桥拓宽改造的新旧空心板横向间连接问题,提出一种新连接设计方法,并结合信阳市杜河桥施工实践,对成桥后的现场静载测试进行分析,结果表明此新连接设计取得了较好的实用效果,可为同类桥梁扩建工程提供参考。     

2021年上海市长宁区道路交通运行状况分析

为了优化道路使用功能与运行效率、提高道路设施服务水平，对上海市长宁区2021年道路交通运行情况进行了分析，梳理现状问题并提出改善建议。首先分析道路基础设施建设情况；其次基于上海市交通信息采集系统，从快速路、交叉口、主要干道三个层面进行交通运行情况的评价；并结合区域内重大项目的交通影响分析，对区域交通运行和管理状况进行系统性的评估，提供未来交通发展趋势研判；最后提出长宁区近期道路交通建设计划和改善建议。     

上海市临港新片区绿化土壤质量评价

土壤是城市发挥绿地功能的载体，与城市宜居性、环境质量和人类的生活质量密切相关。以上海市临港新片区某大型社区为例，对绿化种植土壤和绿化用表土的主控指标（pH、含盐量、EC值、有机质、质地、入渗率和发芽指数）进行了调查分析，评价了土壤质量状况。分析结果表明，绿化种植土壤和绿化用表土含盐量大多满足要求，样品超标率低于4%；质地以壤质砂土和砂质壤土为主，无样品超标。pH、有机质、EC值超标率较高，尤其是EC值超标率高达88%。两种土壤盐碱化严重，EC值和有机质整体偏低，均需进行土壤改良。     

水泥稳定碎石基层在浦东道路工程中的应用

该文结合工程实例介绍水泥稳定碎石的配比设计和施工工艺。用水泥稳定碎石代替以往上海地区常用的粉煤灰三渣作为道路的半刚性材料基层,对重交通道路适用性强,有一定的推广应用价值。