Traffic Engineering and Operations for BRT in Los Angeles NACTO BRT Running Way Workshop #2 June 29, 2010 By: Kang Hu, PE, PTOE Chun Wong, PE
LADOT s s Involvement in BRT LADOT has partnered with LA Metro in National BRT Demonstration Program since 1997 Strong commitment from the Mayors to improve transit services in LA Focusing on improving bus speeds Successfully implemented Transit priority System for 25 Metro Rapid Bus corridors and the Metro Orange Line Responsible for the traffic safety improvements of the Metro Orange Line Developing new bus lane projects 1
LADOT s s Transit Priority System (TPS) A centralized signal priority system Fully integrated with the City s Adaptive Traffic Control System (ATCS) Reduce bus delays at signalized intersections with minimal impacts on cross streets smart priority Provide real-time bus arrival information Measure bus performance throughout the system Page 3
LADOT S S ATSAC Control Center Page 4
TPS Central System Diagram Comm. Network TPS Server (Transit Priority Manager) TPS Workstation Sensor Input Sensor Input Sensor Input 2070 Controller 2070 Controller 2070 Controller Database LAN/WAN Web Server Page 5
Bus Detection Selected loop-transponder based on field tests of 3 different technologies Inductive loops placed in the roadway serve as antennas to receive bus transponder identification code Advance (check-in) detector just past upstream bus stop Release (check-out) detector just prior to limit line or within the intersection Page 6
Bus Loop and Transponder Transponder Page 7
Sensor Card and 2070 Controller Page 8
Bus Priority Operation EARLY GREEN - Phase is started earlier than normal to minimize delays to stopped or approaching buses GREEN EXTENSION - Phase continues past normal endpoint to help buses pass through critical intersections PHASE HOLD - Phase held in green until bus arrives, typically used for left turns. Page 9
Cycle Time Changes 20% 20% 45% Main Street Cross Street 45% Main Street Cross Street Left Turns Left Turns 35% 35% 15% 15% 55% Main Street Cross Street Left Turns 30% 55% Main Street Cross Street Left Turns 30% Page 10
MTA S S Bus Dispatch Center Monitor bus performance Radio communication with bus operators Real time bus data provided by LADOT ATSAC video & camera control access Page 11
TPS Map Client Software Page 12
TPS Performance Benefits The Metro Rapid Buses achieved a 25% reduction in total travel time Transit Priority System alone contributed to 30% of the total travel time saving Bus delays at signalized intersections were reduced by 33-39% Average of 1 second per vehicle per cycle increase in delay to the cross traffic Page 13
Passenger Information System Developed by LADOT Based on bus detection Uses actual travel times Also on the web www.rapidbus.net Page 14
Typical Station Locations Metro Rapid Local Bus Local Bus Metro Rapid 15
Metro Orange Line Busway Page 16
Type of Crossings Median Alignment Diagonal Crossings Side Aligned Intersections (right-turn pocket intersections) Isolated intersections Mid-block Pedestrian Crossings 17
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Traffic Safety Features Traffic Signals All Busway crossings are signalized Protected Left Turn and Right Turns across the Busway Extended All-Red time Pavement Markings Double yellow Busway centerlines Bus Only, Keep Clear and Wait Here markings Signage Illuminated Bus Coming signs NO TURN and DO NOT ENTER signs Illuminated pedestrian/bus signs Bus Xing and Look Both Ways warning signs 24
Protected Turn Pockets 25
Signs and Markings 26
Busway Signs 27
New Crosswalk and Pedestrian Signs 28
Photo Cameras 29
In-Pavement Lights In-Pavement Lights Page 30
San Fernando Valley North-South Transit Corridors Valley N-S Study Corridor Metro Orange Line Canoga Transit Corridor Chatsworth Metrolink Station Metro Red Line North Hollywood Station CANOGA CORRIDOR METRO ORANGE LINE RESEDA CORRIDOR SEPULVEDA CORRIDOR VAN NUYS CORRIDOR LANKERSHIM/SF CORRIDOR