Links Following recent fatal accident,school bus checks kick off nationwide in China According to Xinhua news, twenty-one people, including 19 preschoolers and two adults, died and 43 others were injured when a nine-s...Links Following recent fatal accident,school bus checks kick off nationwide in China According to Xinhua news, twenty-one people, including 19 preschoolers and two adults, died and 43 others were injured when a nine-seat school bus illegally carrying 64 people collided head-on with a展开更多
The school bus system in the United States took its form in 1939 when Frank W. Cyr, from the New York-based Teachers College of Columbia University, organized a national standards conference for school transportation....The school bus system in the United States took its form in 1939 when Frank W. Cyr, from the New York-based Teachers College of Columbia University, organized a national standards conference for school transportation. Representatives of education and transportation depart- ments from all 48 states, together with school bus manufacturers, attended the 7-day meeting. They worked out 45 standards and rules concerning school bus safety, specifying in detail school bus length, roof height, aisle width, etc.展开更多
The school bus routing problem(SBRP)is a central issue in transportation planning and optimization systems.SBRP seeks to plan an efficient schedule for a fleet of school buses where each bus picks up students from var...The school bus routing problem(SBRP)is a central issue in transportation planning and optimization systems.SBRP seeks to plan an efficient schedule for a fleet of school buses where each bus picks up students from various bus stops and delivers them to their designated schools while satisfying various constraints such as the maximum capacity of a bus,and the time window of a school.Due to its inherent complexity,many heuristics have been proposed to solve this combinatorial problem in an effective way.In this paper,a novel geographic information systems(GIS)-based decisionmaking framework that combines GIS,clustering techniques,network cutting techniques,and a hybrid ant colony optimization metaheuristic with the iterated Lin–Kernighan local improvement heuristic is proposed for solving the SBRP as a split delivery vehicle routing problem(SDVRP).Experiments were conducted for evaluating the proposed framework by comparing the results for solving 11 routing problems using both the proposed decision-making framework and Arc-GIS 9.2 Network Analyst which uses the greedy Dijkstra’s algorithm.The reported results of the proposed framework generally outperform that of the ArcGIS Network Analyst.In addition,the proposed decision-making framework was applied to solve a real life SBRP to demonstrate its application.展开更多
Objective:There is no safer way to transport a child than a school bus.Fatal crashes involving occupants are extremely rare events in the US.In recent years,school bus transportation began to develop in China.We want ...Objective:There is no safer way to transport a child than a school bus.Fatal crashes involving occupants are extremely rare events in the US.In recent years,school bus transportation began to develop in China.We want to bring advanced experience on school bus safety in Western countries such as the US to developing countries. Methods:We searched the papers related to school bus safety from Medline,Chinese Scientific Journals Database and the Web of the National Highway Traffic Safety Administration(NHTSA). Results:There were only 9 papers related to school bus safety,which showed that higher levels of safety standards on school buses,school bus-related transportation and environmental laws and injury prevention were the primary reasons for the desired outcome.Few school bus is related to deaths and injuries in the developed countries. Conclusions:The developing countries should make strict environmental laws and standards on school bus safety to prevent children's injury and death.展开更多
文摘Links Following recent fatal accident,school bus checks kick off nationwide in China According to Xinhua news, twenty-one people, including 19 preschoolers and two adults, died and 43 others were injured when a nine-seat school bus illegally carrying 64 people collided head-on with a
文摘The school bus system in the United States took its form in 1939 when Frank W. Cyr, from the New York-based Teachers College of Columbia University, organized a national standards conference for school transportation. Representatives of education and transportation depart- ments from all 48 states, together with school bus manufacturers, attended the 7-day meeting. They worked out 45 standards and rules concerning school bus safety, specifying in detail school bus length, roof height, aisle width, etc.
文摘The school bus routing problem(SBRP)is a central issue in transportation planning and optimization systems.SBRP seeks to plan an efficient schedule for a fleet of school buses where each bus picks up students from various bus stops and delivers them to their designated schools while satisfying various constraints such as the maximum capacity of a bus,and the time window of a school.Due to its inherent complexity,many heuristics have been proposed to solve this combinatorial problem in an effective way.In this paper,a novel geographic information systems(GIS)-based decisionmaking framework that combines GIS,clustering techniques,network cutting techniques,and a hybrid ant colony optimization metaheuristic with the iterated Lin–Kernighan local improvement heuristic is proposed for solving the SBRP as a split delivery vehicle routing problem(SDVRP).Experiments were conducted for evaluating the proposed framework by comparing the results for solving 11 routing problems using both the proposed decision-making framework and Arc-GIS 9.2 Network Analyst which uses the greedy Dijkstra’s algorithm.The reported results of the proposed framework generally outperform that of the ArcGIS Network Analyst.In addition,the proposed decision-making framework was applied to solve a real life SBRP to demonstrate its application.
文摘Objective:There is no safer way to transport a child than a school bus.Fatal crashes involving occupants are extremely rare events in the US.In recent years,school bus transportation began to develop in China.We want to bring advanced experience on school bus safety in Western countries such as the US to developing countries. Methods:We searched the papers related to school bus safety from Medline,Chinese Scientific Journals Database and the Web of the National Highway Traffic Safety Administration(NHTSA). Results:There were only 9 papers related to school bus safety,which showed that higher levels of safety standards on school buses,school bus-related transportation and environmental laws and injury prevention were the primary reasons for the desired outcome.Few school bus is related to deaths and injuries in the developed countries. Conclusions:The developing countries should make strict environmental laws and standards on school bus safety to prevent children's injury and death.
