Active lane management for intelligent connected vehicles in weaving areas of urban expressway

Purpose–This paper aims to use activefine lane management methods to solve the problem of congestion in a weaving area and provide theoretical and technical support for traffic control under the environment of intelligent connected vehicles(ICVs)in the future.Design/methodology/approach–By analyzing the traffic capacities and traffic behaviors of domestic and foreign weaving areas and combining them withfield investigation,the paper proposes the active andfine lane management methods for ICVs to optimal driving behavior in a weaving area.The VISSIM simulation of trafficflow vehicle driving behavior in weaving areas of urban expressways was performed using research data.The influence of lane-changing in advance on the weaving area was evaluated and a conflict avoidance area was established in the weaving area.The activefine lane management methods applied to a weaving area were verified for different scenarios.Findings–The results of the study indicate that ICVs complete their lane changes before they reach a weaving area,their time in the weaving area does not exceed the specified time and the delay of vehicles that pass through the weaving area decreases.Originality/value–Based on the vehicle group behavior,this paper conducts a simulation study on the active traffic management control-oriented to ICVs.The research results can optimize the management of lanes,improve the traffic capacity of a weaving area and mitigate traffic congestion on expressways.

A Brief Analysis of the Migration of Silk Weaving Craftsmen and the Spread of Silk Weaving Techniques in the Ancient Bashu Area along the Southern Silk Road

During ancient times,silk weaving techniques already matured in the Bashu area and“Shu Satin”silk products were widely known.Shu Satin not only performed as a high-quality commodity in the Northern Silk Road trade activities,but also conveyed cultural and social significance.Credit for the importance of Shu Satin must go to the extraordinary weavers in the Bashu area.The migration and circulation of these weavers spread the exquisite brocade and sericulture techniques throughout and beyond the Bashu area,and accelerated brocade and sericulture techniques in ancient southern China,Myanmar,and Vietnam.Accordingly,the Southern Silk Road can be seen as a path to disseminate the silk weaving techniques that originated in the Bashu area.This paper takes the migration of Shu Satin as its mainline and discusses how the weaving craftsmen spread the brocade and sericulture techniques throughout southern China during their travels and migrations,and the immeasurable contributions these craftsmen made to economic and trade activities along the ancient Southern Silk Road.This paper explores the technical accumulation and dissemination of brocade craftsmen in the Bashu area from three perspectives.The first perspective is the accumulation period of the ancient silk weaving techniques-the inflow of craftsmen from central China and the development and integration of the sericulture and silk weaving techniques in the Bashu area.The second is the technique dissemination period,centered on the silk weaving craftsmen in the Chengdu region of the Bashu area.The third is the techniques’outmigration period and the migration and circulation of craftsmen throughout the Bashu area.This paper strives to outline the dynamic lines that the Bashu silk weaving craftsmen created and the spread of their exquisite weaving techniques during their migration and circulation.This will illustrate that the ancient Southern Silk Road was not only a trade and cultural exchange zone for ancient silk commodities,but more importantly,it was a dynamic space for the dissemination and development of brocade weaving techniques.

Investigation on interaction and characteristics of traffic flows in urban elevated road-ramp-ground road system

The rapid development of the automobile industry and the relative lag of the road construction have constituted a prominent contradiction all over the world, particularly, in most of large cities. To cope with it, elevated roads have been built in many cities both at home and abroad. However, traffic jams frequently appear on elevated roads immediately after the completion of their construction. The awkward situation mainly results from the planning bug or the unsuitable control, apart from drastic increase in transportation demand. Elevated roads,