A park and ride facility provides an option to car drivers to park their cars and switch to public transportation for the remaining portions of their trips.Although park and ride has been implemented in many cities in...A park and ride facility provides an option to car drivers to park their cars and switch to public transportation for the remaining portions of their trips.Although park and ride has been implemented in many cities in the United States and integrated with different modes of transportation,no comprehensive approach has been developed in published literature to assess the feasibility of a potential park and ride site.This research proposes a comprehensive approach,which consists of the following tasks,to evaluate potential park and ride facilities:1.Site location analysis 2.Bus system reliability analysis 3.Parking supply and usage analysis 4.Mode choice model 5.User demand and ridership estimation 6.Cost estimation and economic impacts analysis The application of the proposed tasks was demonstrated through a case study of a site in the City of El Paso,Texas.展开更多
A lane changing event,at the instant when a vehicle crosses the lane marker,involves up to five vehicles:the subject vehicle,preceding and following vehicles in the original lane,and the preceding and following vehicl...A lane changing event,at the instant when a vehicle crosses the lane marker,involves up to five vehicles:the subject vehicle,preceding and following vehicles in the original lane,and the preceding and following vehicles in the target lane.Understanding the interactions of the subject vehicle with the surrounding vehicles is fundamental to the study of the safety and modeling of lane changing behavior.This research studies the statistical properties of 10 lane changing parameters.These parameters describe the gaps,times to collision between vehicles and the subject vehicle’s speed.The parameter values were extracted from the vehicle trajectory data in the Next Generation Simulation data sets.The results show that(i)all the parameters are positively correlated with each other;(ii)the gaps and distance are best described by the lognormal distribution;(ii)the times to collision are best described by the Laplace distribution;(iii)the speed may be described by the log-logistic distribution and the normal distribution.The results suggest that using one or few selected parameters may be sufficient to quantify the risk of a lane changing event.展开更多
文摘A park and ride facility provides an option to car drivers to park their cars and switch to public transportation for the remaining portions of their trips.Although park and ride has been implemented in many cities in the United States and integrated with different modes of transportation,no comprehensive approach has been developed in published literature to assess the feasibility of a potential park and ride site.This research proposes a comprehensive approach,which consists of the following tasks,to evaluate potential park and ride facilities:1.Site location analysis 2.Bus system reliability analysis 3.Parking supply and usage analysis 4.Mode choice model 5.User demand and ridership estimation 6.Cost estimation and economic impacts analysis The application of the proposed tasks was demonstrated through a case study of a site in the City of El Paso,Texas.
文摘A lane changing event,at the instant when a vehicle crosses the lane marker,involves up to five vehicles:the subject vehicle,preceding and following vehicles in the original lane,and the preceding and following vehicles in the target lane.Understanding the interactions of the subject vehicle with the surrounding vehicles is fundamental to the study of the safety and modeling of lane changing behavior.This research studies the statistical properties of 10 lane changing parameters.These parameters describe the gaps,times to collision between vehicles and the subject vehicle’s speed.The parameter values were extracted from the vehicle trajectory data in the Next Generation Simulation data sets.The results show that(i)all the parameters are positively correlated with each other;(ii)the gaps and distance are best described by the lognormal distribution;(ii)the times to collision are best described by the Laplace distribution;(iii)the speed may be described by the log-logistic distribution and the normal distribution.The results suggest that using one or few selected parameters may be sufficient to quantify the risk of a lane changing event.
