In the U.S.and worldwide,driver behavior within an area close to high-speed signalized intersections-the dilemma zone,can be a major safety concern especially for heavy trucks.A variety of mechanisms are available as ...In the U.S.and worldwide,driver behavior within an area close to high-speed signalized intersections-the dilemma zone,can be a major safety concern especially for heavy trucks.A variety of mechanisms are available as countermeasures for the dilemma zone problem.In Nebraska,the Department of Roads has developed and implemented an Actuated Advance Warning dilemma zone protection system.The system has been effective at improving traffic safety in isolated applications.However,the system is yet to be used at signalized intersections operating in the coordinated mode.This paper presents results from a simulation study that assessed the potential deployment of the system on arterials where the signals are closely spaced and operate in a coordinated mode.The analysis indicated that,on average,there were 30%,7%and 30%reductions in the number of rear-end,lane change and crossing conflicts.The system also improved relative productivity by processing more vehicles.展开更多
In the U.S.and worldwide,driver behavior within an area close to high-speed signalized intersections-the dilemma zone,can be a major safety concern especially for heavy trucks.A variety of mechanisms are available as ...In the U.S.and worldwide,driver behavior within an area close to high-speed signalized intersections-the dilemma zone,can be a major safety concern especially for heavy trucks.A variety of mechanisms are available as countermeasures for the dilemma zone problem.In Nebraska,the Department of Roads has developed and implemented an Actuated Advance Warning dilemma zone protection system.The system has being effective at improving traffic safety in isolated applications.However,the system is yet to be used at signalized intersections operating in the coordinated mode.This paper presents results from a simulation study that assessed the potential deployment of the system on arterials where the signals are closely spaced and operate in a coordinated mode.The analysis indicated that,on average,there were 30%,7%and 30%reductions in the number of rear-end,lane change and crossing conflicts.The system also improved relative productivity by processing more vehicles.展开更多
This paper illustrates the studies and developments of China’s rainstorm warning service system, including its design and construction, information collecting, product distributing and government special service line...This paper illustrates the studies and developments of China’s rainstorm warning service system, including its design and construction, information collecting, product distributing and government special service line, etc. Results obtained by the Hubei, Sichuan, Henan and Jiangsu Provinces, etc are introduced. Another main focus of the paper is on the research and construction of the national typhoon and rainstorm disaster reduction information system. In addition, a series of research results serving the various systems is also discussed and a preliminary analysis is made at the end on the effect of the system which goes into operation in the course of construction, thus revealing that the system has brought notable social and economic benefit.展开更多
文摘In the U.S.and worldwide,driver behavior within an area close to high-speed signalized intersections-the dilemma zone,can be a major safety concern especially for heavy trucks.A variety of mechanisms are available as countermeasures for the dilemma zone problem.In Nebraska,the Department of Roads has developed and implemented an Actuated Advance Warning dilemma zone protection system.The system has been effective at improving traffic safety in isolated applications.However,the system is yet to be used at signalized intersections operating in the coordinated mode.This paper presents results from a simulation study that assessed the potential deployment of the system on arterials where the signals are closely spaced and operate in a coordinated mode.The analysis indicated that,on average,there were 30%,7%and 30%reductions in the number of rear-end,lane change and crossing conflicts.The system also improved relative productivity by processing more vehicles.
基金The authors would like to acknowledge the contributions of numerous individuals and organizations that made the successful completion of this study possible.We are especially grateful to the Federal Highway Administration for making the Surrogate Safety Assessment Module available to usand the business team at the Mid-America Transportation Center who provided technical support.
文摘In the U.S.and worldwide,driver behavior within an area close to high-speed signalized intersections-the dilemma zone,can be a major safety concern especially for heavy trucks.A variety of mechanisms are available as countermeasures for the dilemma zone problem.In Nebraska,the Department of Roads has developed and implemented an Actuated Advance Warning dilemma zone protection system.The system has being effective at improving traffic safety in isolated applications.However,the system is yet to be used at signalized intersections operating in the coordinated mode.This paper presents results from a simulation study that assessed the potential deployment of the system on arterials where the signals are closely spaced and operate in a coordinated mode.The analysis indicated that,on average,there were 30%,7%and 30%reductions in the number of rear-end,lane change and crossing conflicts.The system also improved relative productivity by processing more vehicles.
文摘This paper illustrates the studies and developments of China’s rainstorm warning service system, including its design and construction, information collecting, product distributing and government special service line, etc. Results obtained by the Hubei, Sichuan, Henan and Jiangsu Provinces, etc are introduced. Another main focus of the paper is on the research and construction of the national typhoon and rainstorm disaster reduction information system. In addition, a series of research results serving the various systems is also discussed and a preliminary analysis is made at the end on the effect of the system which goes into operation in the course of construction, thus revealing that the system has brought notable social and economic benefit.
