Www.ptvamerica.com Bus Lane with Intermittent Priority.
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Transcript of Www.ptvamerica.com Bus Lane with Intermittent Priority.
www.ptvamerica.com
Bus Lane with Intermittent Priority
© PTV America 2007
• Bus Lane with Intermittent Priority (BLIP)
• Exclusive bus lane provided when bus is present
• BLIP lane controlled with
In-Pavement Lights
BLIP Concept
Overhead Lane-Use Control Signals
© PTV America 2007
BLIP Operations1. All lanes open to traffic prior to bus arriving.
2. Approaching bus is detected.
3. Overhead lane-use control signals activate.
4. In-pavement lights activate.
5. Traffic begins exiting BLIP lane.
6. Bus enters cleared BLIP lane.
7. As bus clears a block, lane reopens.
8. This process continues until bus exits BLIP lane.
9. BLIP lane remains open until next bus is detected.
© PTV America 2007
Features
BLIP Concept
Bus detection
Signal
BLIP lane
BLIP Start
BLIP End
Lane-use control signals
= Lane open to general purpose traffic
= Lane open to bus only
In-PavementLights
© PTV America 2007
All lanes open
BLIP Concept
BLIP Start
BLIP End
© PTV America 2007
Bus approaches BLIP lane
BLIP Concept
• Approaching bus detected• Lane-use control signals change• In-pavement lights flash
BLIP Start
BLIP End
© PTV America 2007
General purpose traffic exits BLIP lane
BLIP Concept
BLIP Start
BLIP End
© PTV America 2007
Bus enters cleared BLIP lane
BLIP Concept
BLIP Start
BLIP End
© PTV America 2007
Bus travels along BLIP lane
BLIP Concept
BLIP Start
BLIP End
• Lane reopens to general purpose traffic after bus travels through each block
© PTV America 2007
Return to all lanes open
BLIP Concept
BLIP Start
BLIP End
© PTV America 2007
Key Benefits• Bus travel time reduced
• Bus schedule reliability improved
• Exclusive bus lane provided only when needed!
• Strategy fits within existing right-of-way
• Existing property access maintained
© PTV America 2007
Key Challenges• Public information/education campaign is required
• Requires driver compliance
• Enforcement may be needed
• Traffic delays may increase under specific conditions
© PTV America 2007
BLIP Applicability• Transit service can benefit from an exclusive lane
• Right-of-way is limited
• Balance can be found between transit benefits + traffic impacts
• Compatible with Transit Signal Priority to maximize transit benefits
© PTV America 2007
Where has it been applied• University Avenue, Lisbon, Portugal
• Melbourne, Australia
© PTV America 2007
Next Steps• Microsimulation for Feasibility Study