MBTA Green Line Positive Train Control Project

Transcription

1 PRESENTATION MBTA Green Line Positive Train Control Project Presented to: MBTA Board of Directors December 2012

2 Agenda Project Goal Why Green Line PTC/Evaluation Criteria? Key Findings Maintaining Green Line Service Characteristics Projected Implementation Costs Next Steps Project Implementation Schedule Q&A 2

3 Project Goal Provide safe, reliable and efficient service to the traveling public Limit the risk of an accident by on the MBTA s Green Line by implementing a Positive Train Control (PTC) system Project divided into three phases: Phase I Vehicle Collision Avoidance Assessment Phase II Condition Assessment Phase III Alternatives Analysis and Recommendations 3

4 Positive Train Control Positive Train Control is a system to prevent: Train to train collisions Excessive speed derailments, including derailments related to curve restrictions, and slow orders Train incursions into established work zones Movement through main line switch in the incorrect position. 4

5 Why Green Line PTC? The National Transportation Safety Board (NTSB) investigation of a Green Line May 2008 incident, which involved one fatality and multiple injuries, concluded: This accident could have been prevented had the Massachusetts Bay Transportation Authority Green Line been equipped with a positive train control system that could have intervened to stop train 3667 before it could strike the rear of train Synergies of PTC and Green Line state of good repair investments, Track switch replacement Microprocessor interlockings Replacement of obsolete signal components Improved communications (Fiber backbone) 5

6 MBTA Green Line PTC Phase III Alternatives Analysis Evaluation Criteria Operational Improvements/Impact Order of Magnitude Cost In service History System Design Principles Impact on Collision Avoidance Vehicle Considerations Infrastructure Improvement Modification and Expansion Fall back Operations Additional Operational Advantages Feasibility of Implementation 6

7 Green Line PTC Key Findings Maintaining Green Line Service Characteristics Green Line with each of the 3 PTC Technologies (Moving Block, Virtual Block, Distance-to-Go) was simulated. PTC results in degradations in travel times, passenger wait times, and throughputs PTC will require mitigation in order to maintain current Green Line customer experience. Three mitigation scenarios based upon speed improvements were simulated. Speed Improvements Infrastructure Improvements Three Car Operations Mitigation strategies improved throughput and travel times. 7

8 Green Line PTC Key Findings Scores of 3 PTC technologies differ by less than 2 percent. MBTA should progress PTC preliminary design while maintaining ability to support any of the 3 technologies. As detailed plans and specifications are developed, MBTA opt for: Specification of a particular technology or; Selection of a supplier/integrator based on a performance specification not tied to one technology. (Cont.) 8

9 Average Trip Time Central Subway Baseline Maintaining Green Line Service Characteristics Trip Time PTC without Mitigation Not Feasible PTC with Speed Increases PTC with Mitigation PTC with Operational Changes PTC with Vehicle Changes PTC with Speed Increase & 3-Car Ops Better than or equal to Baseline 9

10 Passengers per Hour Maintaining Green Line Service Characteristics Central Subway Throughput Baseline PTC without Mitigation Not Feasible PTC with Speed Increases PTC with Mitigation PTC with Operational Changes PTC with Vehicle Changes PTC with Speed Increase & 3-Car Ops Better than or equal to Baseline 10

11 Projected Implementation Costs Estimated Green Line PTC capital cost (2012 $): CBTC Moving Block - $662 million, CBTC Virtual Block - $645 million DTG estimated - $721 million Estimates include train control and vehicle installation costs for a live system Estimates reflect PTC mitigation, including track upgrades, turnout replacement and additional vehicles/power system upgrades to support 3 car operation 11

12 Green Line PTC Next Steps Address Green Line train control state of good repair issues, Build out fiber backbone, Track circuit replacement, Replace interlockings for better reliability, make them PTC ready, Track switch replacement (reliability, speed improvements) These projects will make Green Line PTC Ready and provide improved service (better passenger information, reliability and travel times), 12

13 Green Line PTC Next Steps (GLX) GLX can serve as Green Line PTC initial deployment phase (vehicles, central control and wayside), (Cont.) Improves implementation efficiency by eliminating revenue operating constraints during construction, Provides signal system cost savings versus wayside signaling now and PTC after GLX opens. 13

14 Green Line PTC Implementation Schedule Standard Procurement (Months) Consultant Design Prebid/Bid & Award Final Design Submittals & Review Manufacturing of Equipment & Factory Testing Vehicle Installation Field & OCC Installation Testing and Certification Total Duration 18 Months 18 Months 12 Months 30 Months Decision point 22 months 48 Months 60 Months 18 Months 9 Years 14

15 Summary Begin PTC design and Readiness Projects State of good repair projects also achieve PTC readiness Immediate benefit to riding public through decreased travel times and increased service reliability Green Line Extension (GLX) provides unique opportunity for Testing and Validation 15

16 Q&A 16