Transportation professionals in China are facing challenges resulting from increased conflicts be... more Transportation professionals in China are facing challenges resulting from increased conflicts between various transportation modes in mixed traffic. This research examines practical and low-cost measures that could reduce the number of conflicts at intersections between bike lane occupants and right-turning vehicles, while maintaining or improving existing operational performance. To test different configurations, three representative intersections in Kunming, China, were analyzed using microsimulation software. The unique traffic flows and geometric layout of the intersections resulted in different alternatives being applied at each intersection. Changes included signal phase changes, such as delayed green signals and separate bicycle phasing; and geometric changes, such as the addition of turn lanes and upstream merge sections for conflicting traffic. Two main operational parameters are used to evaluate existing conditions and alternatives: delay and queue length. Each alternative was compared with the existing conditions to determine the impact on operations, while potentially reducing conflict. The addition of right-turn lanes, which displaces conflicts relative to other alternatives, yielded generally shorter queue lengths and delay, mostly because of added capacity. Partially protected through-bike signal phases proved to only slightly increase delay for most road users, and in some cases reduced delay, but could be more effective at reducing conflict than right-turn lane geometric strategies.
Page 1. MTI Report 04-05 Mineta Transportation Institute Created by Congress in 1991 Designing an... more Page 1. MTI Report 04-05 Mineta Transportation Institute Created by Congress in 1991 Designing and Operating Safe and Secure Transit Systems: Assessing Current Practices in the United States and Abroad MTI Designing and Operating Safe and Secure T ransit Systems: ...
In many urban areas, high-occupancy vehicle (HOV) lanes have been provided to permit carpools and... more In many urban areas, high-occupancy vehicle (HOV) lanes have been provided to permit carpools and express buses to bypass congestion and offer a significant travel time advantage to commuters willing to share a ride or take transit. In many locations, however, HOV lanes are incomplete because of difficulties in securing right-of-way or funding. In other locations, because existing HOV lanes
Description/Abstract Bike sharing is an exciting new model of public-private transportation provi... more Description/Abstract Bike sharing is an exciting new model of public-private transportation provision that has quickly emerged in the past five years. Technological advances have overcome hurdles of early systems and cities throughout the globe are adopting this ...
Abstract: The Federal Motor Carrier Safety Administration (FMCSA) Wireless Roadside Inspection (W... more Abstract: The Federal Motor Carrier Safety Administration (FMCSA) Wireless Roadside Inspection (WRI) Program is demonstrating the feasibility and value of electronically assessing truck and coach driver and vehicle safety at least 25 times more often than is ...
Transportation professionals in China are facing challenges resulting from increased conflicts be... more Transportation professionals in China are facing challenges resulting from increased conflicts between various transportation modes in mixed traffic. This research examines practical and low-cost measures that could reduce the number of conflicts at intersections between bike lane occupants and right-turning vehicles, while maintaining or improving existing operational performance. To test different configurations, three representative intersections in Kunming, China, were analyzed using microsimulation software. The unique traffic flows and geometric layout of the intersections resulted in different alternatives being applied at each intersection. Changes included signal phase changes, such as delayed green signals and separate bicycle phasing; and geometric changes, such as the addition of turn lanes and upstream merge sections for conflicting traffic. Two main operational parameters are used to evaluate existing conditions and alternatives: delay and queue length. Each alternative was compared with the existing conditions to determine the impact on operations, while potentially reducing conflict. The addition of right-turn lanes, which displaces conflicts relative to other alternatives, yielded generally shorter queue lengths and delay, mostly because of added capacity. Partially protected through-bike signal phases proved to only slightly increase delay for most road users, and in some cases reduced delay, but could be more effective at reducing conflict than right-turn lane geometric strategies.
Page 1. MTI Report 04-05 Mineta Transportation Institute Created by Congress in 1991 Designing an... more Page 1. MTI Report 04-05 Mineta Transportation Institute Created by Congress in 1991 Designing and Operating Safe and Secure Transit Systems: Assessing Current Practices in the United States and Abroad MTI Designing and Operating Safe and Secure T ransit Systems: ...
In many urban areas, high-occupancy vehicle (HOV) lanes have been provided to permit carpools and... more In many urban areas, high-occupancy vehicle (HOV) lanes have been provided to permit carpools and express buses to bypass congestion and offer a significant travel time advantage to commuters willing to share a ride or take transit. In many locations, however, HOV lanes are incomplete because of difficulties in securing right-of-way or funding. In other locations, because existing HOV lanes
Description/Abstract Bike sharing is an exciting new model of public-private transportation provi... more Description/Abstract Bike sharing is an exciting new model of public-private transportation provision that has quickly emerged in the past five years. Technological advances have overcome hurdles of early systems and cities throughout the globe are adopting this ...
Abstract: The Federal Motor Carrier Safety Administration (FMCSA) Wireless Roadside Inspection (W... more Abstract: The Federal Motor Carrier Safety Administration (FMCSA) Wireless Roadside Inspection (WRI) Program is demonstrating the feasibility and value of electronically assessing truck and coach driver and vehicle safety at least 25 times more often than is ...
Uploads
Papers by Christopher Cherry