bus signal priority: effets on quality of service and necessary condition on conceiving a system of...
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Bus signal priority: effets on quality of service and necessary condition on conceiving a system of this kind
Jean-Jacques HENRY - ITSJUZhengyi LIN – SoditHao ZHU - SCCTPI
Introduction of Bus signal priority: •The PT priority is at the border of 2
worlds▫Roads: road authorities, urban traffic
manager, police, in charge of managing road traffic
▫Public transport: public and private companies, in charge of managing fleet of vehicles
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Bus priority : some results
• Travel times for buses are in average 10% smaller with priority
• It is more efficient when traffic is not too saturated
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Bus priority : some results• Travel times for buses are also more regular (blue
line) with priority• There is less dispersion of travel times, so
timetable are more effective• There are more passengers attracted due to better
regularity
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System Architecture and components
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System architecture (1)
•Two technical points are essential:▫The Public Transport vehicle detection▫The way to take into account the priority
afterward•The combination of these 2 concepts
determine the system architecture
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System architecture (2)Vehicle detection Priority Management
• Local Detection▫ Buried electromagnetic
loops, active or passive▫ Radars▫ RF transponders
• Continuous vehicle tracking▫ Odometers▫ Infrared communication▫ GPS▫ Radio beacons
• Local Action▫ The traffic light
controller manage the traffic signal plan according to its internal program
• Centralized Action▫ The traffic light
controller receive orders form a control center then update the local traffic signal plan
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•A bilateral project, Supported by French FASEP fund •Pioneering in integration of French advanced technologies and experiences in shanghai’s local context.
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Bus signal priority “Pilot” Project
SCCTPI hosts and supports the project in Shanghai
French consortium, supported by French FASEP funds
SODIT : traffic + transport consultancyTHALES : equipments provider for buses & traffic controllerCITILOG : video monitoring of junctionsCERTU : evaluation of results
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Architecture and system realised
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What ensure or disturb the running bus and bus priority ?•As we know, bus signal priority is one of
the tools that can improve the bus line’s efficiency, which depends on a lot of interactions with other tools or events.
•A short film helps to apprehend the events that facilitate or disturb the running bus in the mixed traffic
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Things that facilitate the bus running
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▫Turning right on red▫Using the lateral lane for turning on the
right▫Use of the lateral lane for docking at stop▫Using the lateral lane as a Right-of-Way▫Priority against vehicles/pedestrians
forwards while turning on the left, or on the right as well
▫Efficient ticketing validation on board and contact-free system
Things that disturb the bus running and bus priority
▫Vehicles parking on the lateral lane▫Traffic congestion▫Short bay for docking▫Other bus or big vehicles in front of the bus
taking priority to turn on left▫Pedestrians waiting on the road to cross
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Necessary conditions when conceiving a bus signal priority system in common traffic (1)Regarding road
infrstructures:
• Enforce the usage of the Right-of-Way before crossrad and before bus stop
• To optimize the platforms of docking▫ A wider waiting space▫ Multiple bays according
the busyness of the stop
Objectives:
• Ensure regular progression of bus
• Improve the road safety and bus Service confort
• Make bus signal priority more efficient and less degrade the general traffic
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Necessary conditions when conceiving a bus signal priority system in common traffic (2)Regarding pedestrian/vehicle
behaviors:
• Enhance the trafic regulation, road safety
Regarding trafic congestion:
• Take in accout the general trafic condtion when according the priority to bus
• In case of congestion, coordinate the trafic light control in the sector
Objectives:• Road safety• Fluid bus running
• Reduce the impact on vehicle circulation
• Make priority more efficient
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On conceiving a bus signal priority system
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Output of FASEP BPS Project10-November-09
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Future cooperation: EC Project VIAJEO
•An open platform for transport planning and travel information
•Capable to collect, merge, disseminate traffic and public transportation data as well as environmental data
•Demonstration in 4 demo sites:▫Athens (Grace)▫Sau Paulo (Brazil) ▫Beijing and Shanghai (China)
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Future cooperation –VIAJEO Shanghai project
• Objectives of the Shanghai site:▫ To develop the PT information service ex:
bus arrival time, timetable…▫To integrate differents data (trafic,PT,FCD…)
and connect traffic and pollution data into platform
• Partners:▫ SCCTPC: local coordinator (Mr.ZHU)
▫ ITSJU: Project leader CERTU: Architecture conception
▫ TSSS: system development RIOH: validation
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Conclusion
•Thanks to FASEP BPS Project, cooperation is installed
•Good findings in bus signal priority •Progress in conception on BPS system
and bus line’s operation
“BSP is one of the solution durable in the transportation management, depending on the interaction of others relevant factors!”
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Thank you for your attention !
谢谢 !