Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.
-
Upload
evelyn-stanley -
Category
Documents
-
view
213 -
download
0
Transcript of Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.
![Page 1: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/1.jpg)
Left Lane Mixed-Traffic BRTAugust 22, 2012
Stefano Viggiano and Jack Gonsalves
![Page 2: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/2.jpg)
Agenda
• Balancing BRT priority and impacts
• Why consider a left-lane option
• Technical issues
• Lessons learned
![Page 3: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/3.jpg)
BRT SpectrumBRT – “Lite”
Eugene EmX Orange Line - LA“Hybrid” BRT
Swift BRT - EverettFull BRT
$2-5 million per mile $10–30 million per mile$5–10 million per mile
![Page 4: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/4.jpg)
A Balancing Act
• Key issue is exclusive lanes vs. mixed traffic• Exclusive lanes
• Improved performance• Long-term benefits• Rail-like image
• Mixed Traffic• Less expensive• Less impact• Easier to implement
![Page 5: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/5.jpg)
Curbside Mixed Traffic
• Advantages• Least expensive
• Less risky (public perception)
• Disadvantages• Conventional bus image
• Right lane typically has more friction/delay
• Pedestrian/bike conflicts
![Page 6: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/6.jpg)
Left Lane Mixed Traffic
• Advantages• Different image/median stations
• Potentially faster travel
• Smoother ride
• Avoids conflicts with bikes/peds
• Disadvantages• More expensive (vehicle/property/construction)
• Concern about safety of median stations
• Possible impact on left-turn access
![Page 7: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/7.jpg)
Mid-Block Median Station
![Page 8: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/8.jpg)
Double-Sided Median Station
![Page 9: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/9.jpg)
Split Median Station
![Page 10: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/10.jpg)
Left Lane Mixed Traffic Design Issues
• Approach docking geomerty
• Merging back into traffic
• Pedestrian Access
• Impact on Business Access
• Right-side or Left-side Boarding
• Pullout or stop in traffic?
![Page 11: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/11.jpg)
Mid-Block Median Station - Design
![Page 12: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/12.jpg)
Double-Sided Median Station - Design
![Page 13: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/13.jpg)
Split Far-Side Median Station - Design
![Page 14: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/14.jpg)
T-Intersection Median Station - Design
![Page 15: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/15.jpg)
Split Median Station – Right Hand Bus Door From left hand Lane - extreme “S” curve approachFrom Left turn PocketMid - Block Median Station not applicable for Right Hand Bus Door
![Page 16: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/16.jpg)
Cost Considerations
• Extra cost for Median vs Curbside - $7M
• Requires 20-22 ft width in median
• Right of way, new street widening tapers.
• New sidewalk and pave marking and Traffic signal poles
• $240K /per vehicle extra cost for doors both sides
![Page 17: Left Lane Mixed-Traffic BRT August 22, 2012 Stefano Viggiano and Jack Gonsalves.](https://reader036.fdocuments.us/reader036/viewer/2022070412/5697bf751a28abf838c804f6/html5/thumbnails/17.jpg)
Considerations - Left Lane BRT
• Perceived Transit Image
• Smoother ride/ potentially faster speeds
• Preserves sidewalk zone for pedestrian/multi use
• Eliminates Bike lane conflicts
• Eliminates driveway - right hand turn conflicts
• Preserves space for future transit conversion
• Median platform serves as crosswalk refuge
• Allows fixed route curb side Bus stops to remain