To promote the development of traffic engineering disciplines in China, the progress, hot topics, existing problems and its countermeasures and development prospects of traffic engineering in academic researches at home and abroad were systematically summarized in 11 aspects including traffic flow theory, traffic planning, road traffic safety, traffic control and intelligent transportation system, traffic management, traffic design, traffic service facilities and electrical facilities, ground public transit, urban parking transportation, traffic big data, and traffic evaluation. In the aspect of traffic flow theory, fundamental diagram model of traffic flow, microscopic and mesoscopic traffic flow theories and their simulations, macroscopic traffic flow theory, and network theory of traffic flow were reviewed. As for traffic planning, traffic and land utilization, traffic and sustainable development, characteristics of traffic travelling behaviors, traffic survey methods and demand forecasting were summarized. Reviews of road traffic safety included traffic safety planning, facility safety, traffic safety management, traffic behavior, vehicle active safety, technical standards and norms of traffic safety, etc. Reviews of traffic control and intelligent transportation systems included traffic signal control,corridor control,traffic control and traffic assignment,cooperative vehicle-infrastructure system and intelligent vehicle system,etc. As for traffic management, traffic laws and order management, traffic system management, traffic demand management, and abnormal traffic management were reviewed. In terms of traffic design, traffic network design, node traffic design, traffic design of urban road, the bus traffic design, and traffic language design were summed up. The review on the aspect of ground public transit involved transit industry regulation and service evaluation, planning and optimization of public transit network, transit operation management and intelligent technology, and the new transit system. As for urban parking transportation, urban parking demand, planning and design of parking facilities, parking management and policies, and intelligentization and informatization of parking were expounded comprehensively. As for traffic big data, the researches on the application of mobile phone data, transit IC card, GPS track and license plate recognition, and social media data to traffic system analysis, especially the research progress in investigation of individual travelling behavior were reviewed. In the aspect of traffic evaluation, the assessments of social and economic impact and traffic impact on traffic construction projects were analyzed.

In order to promote the development of China's bridge engineering subject, the academic research status, hot issues, existing problems, corresponding countermeasures and development prospects about bridge engineering at home and abroad (including bridge structural design, new bridge construction technology, bridge disaster prevention and mitigation) were studied systematically. Firstly, the progress of bridge engineering in academic researches were summarized in five aspects including high performance materials and structural systems, industrial and intelligent construction technology, disaster-resistant capability and deep water foundation. Secondly, all aspects of the above filed in bridge engineering were summarized systematically: steel bridge, composite bridge and deep water foundation in bridge structural design; new construction technology of steel bridges and accelerated bridge construction technology of RC bridges; seismic resistance, wind resistance, fire resistance and anti-collision in bridge disaster prevention and mitigation, as well as the corresponding development prospects. Hopefully, this paper is supposed to provide new perspectives and basic data for academic researches and engineering practice on bridge engineering subject.

As the foundation of the pavement structure, a stable, strong and durable subgrade plays a key role in the quality protection of pavement. However, the phenomenon of paying attention to road surface but neglecting subgrade has existed in China for a long time, and makes it very common that the subgrade diseases lead to the destruction of pavement structure. Based on the subgrade engineering in recent years related the technical innovation contents of the China's National Science and Technology Award, the projects of the Ministry of Science and Technology (MOST) and the National Natural Science Foundation of China (NSFC), the excellent Chinese authoritative journals, and the highly cited papers in Web of Science (WoS), this review paper systematically analyzes the research status and future development direction of 5 major fields of pavement engineering in China and abroad. This content includes advanced foundation treatment technology, embankment filling engineering properties, embankment structural performance evolution under multi-field coupling action, cutting slope stability analysis, subgrade retaining and protection. Overall, this review paper is able to provide references and insights for researchers and engineers in the field of subgrade engineering.

In the past six years, China has made a tremendous number of achievements in tunnel engineering, which will greatly help China shift dramatically to achieve the great leap from a large tunneling country to a strong tunneling power of the world. In order to promote the sustainable and high quality development of tunnel engineering, the state of the art in tunneling was systematically analyzed in this review paper, including the construction status quo , design technology, survey and forward prospecting technology, excavation and support technology, green approach with Eco-friendly construction and operation technology, mechanized and intelligent construction, lining structure anti-seismic technology, operation support facilities, maintenance and operation technology, and typical tunnel engineering cases of traffic tunnels. Overall, this review paper provides references and insights for researchers and engineers in the field of tunnel engineering.

With More than 40 years of reform and opening, the highway construction in China has made remarkable achievements, which strongly supports the rapid development of the country's social economy. In the recent years, new theories, new methods, new technologies, new processes, new structures, and new materials related to pavement engineering are emerging. Based on the typical problems encountered in pavement construction, the technical innovation contents of the China's National Science and Technology Award, the projects of the Ministry of Science and Technology (MOST) and the National Natural Science Foundation of China (NSFC), the excellent Chinese authoritative journals, and the highly cited papers in Web of Science (WoS), this review paper systematically analyzes the research status and future development direction of 7 major fields of pavement engineering in China and abroad. The content includes intelligent and environment-friendly pavement, advanced pavement materials, advanced construction technology, pavement maintenance technology, pavement structure and mechanical properties, solid waste comprehensive utilization technology, and pavement recycling technology. Overall, this review paper is able to provide references and insights for researchers and engineers in the field of pavement engineering.

To improve the development of bridge design theory, including comprehensive consideration of multiple hazards, progress in the research of bridge design methods for multiple hazards is reviewed. First, the origins and research developments of bridge design methods are summarized, emphasizing the consideration of multihazard actions. Then, the concepts of multiple hazards and combination modes of hazards are explicitly specified. Moreover, the principles of a performance-based design method and its applications in bridge disaster mitigation design are specified. Next, structural performance degradation and life-cycle cost-based bridge disaster mitigation design methods are discussed. Finally, problems and shortcomings of the status of research are specified. The results indicate that, so far, there are two paths by which bridge multihazard design methods can be developed. One is to balance design demands of different hazards to seek optimal structural performance, and the other is to satisfy the design demands of hazard combination to seek acceptable structural performance. However, an integrated theory and a framework of bridge multihazard design has not yet been established systematically, and several technical challenges, such as the design objective, performance standard system, decision criteria, design optimization method, and hazard-actio