R.M.N.T. Sirisoma a Doug Morgan b S.C. Wirasinghe a

Transcription

1 R.M.N.T. Sirisoma a Doug Morgan b S.C. Wirasinghe a a Dept. of Civil Engineering, Schulich School of Engineering, University of Calgary b Calgary Transit, Calgary, Canada

2 Introduction Study Area Availability of Data Data Analysis Recommendations and Conclusion

3 The reliability of a LRT system is defined as the probability of operating of trains according to the schedule. Due to operational difficulties the actual departure time can be more than few minutes of the actual schedule time (Maximum of 5 minutes). But if the train arrives it has to wait till the scheduled departure time. Calgary Transit considers the delays less than 3 minutes as a punctual train Reliability can be measured using some of those parameters such as Probability of delay departures Probability of early departures Actual and scheduled average travel time between links Expected arrival time and actual arrival time etc. Mean and standard deviation of delays

4 In LRT system in Calgary has many operational issues such as Technical issues Train breakdowns Faulty signals Malfunctioning of automatic doors of trains Operational issues Running in bad weather Accidents At- grade railway crossings Boarding and alighting times Passenger emergencies Passengers holding doors Construction disruptions (single tracking, reverse running, slow orders) Planning related issues Schedule development Dwell/travel time estimation

5 The LRT system consists of three NW, NE and SE lines connecting downtown. In this study the NE line was considered for the analysis. Northeast Railway line consists of Eight railway stations outside the downtown Ten staggered stations for both in bound and out bound directions in downtown section End terminal at downtown at 10 th street southwest Total length of line 14.6 km Double track (with few trailing cross-overs) Share the 7 th Avenue by both buses and LRT, emergency vehicles and pedestrians. 16 at-grade crossings controlled by fixed time traffic signals and accessible to cars and pedestrians with two inter locking at both ends of 7 th Avenue

6 Source : Calgary Transit

7 7 th Avenue in Downtown with at grade- rail crossings Source : Calgary Transit

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9 Schedule for LRT for Northeast line Passenger Counts done for commuter survey in 2007 Departure time for all trains in each station for the whole day for both directions for month of July 2008 Distances between LRT stations

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11 Percentage Comparison of delay of trains for in bound - weekdays McKnight 3rd ST SE th ST SW More Delay Min

12 Percentage Headway Ratio for Stations for in Bound - Weekdays Headway Ratio Actual HW Scheduled HW McKnight 3rd ST SE 7th ST SW Station

13 Percentage Delay Distribution of trains at time points for outbound (towards McKnight) Delay Distribution of trains for Out Bound - Weekdays th ST SW City Hall Whitehorn More Delay Min

14 Percentage Headway Ratio for Outbound Headway Ratio for Trains for Out Bound - Weekdays th ST SW City Hall Whitehorn Station

15 percentage Difference between actual headway and scheduled headway along the NE line for AM peak (6.00 to 9.00) - out bound more 0 10th ST SW to City Hall City Hall to Bridgeland Bridgeland to Barlow Barlow to Franklin Franklin to Marlborough Marlborough to Rundle Rundle to Whitehorn delay min

16 Percentage Difference between actual headway and scheduled headway along the NE line for off peak (9.00 to 15.00) - out bound more 0 10th ST SW to City Hall City Hall to Bridgeland Bridgeland to Barlow Barlow to Franklin Franklin to Marlborough Marlborough to Rundle Rundle to Whitehorn Delay Min

17 Percentage Difference between actual headway and scheduled headway along the NE line for PM peak (15.00 to 18.00) - out bound more 0 10th ST SW to City Hall City Hall to Bridgeland Bridgeland to Barlow Barlow to Franklin Franklin to Marlborough Marlborough to Rundle Rundle to Whitehorn Delay Min

18 Time Min : Sec Comparison of Travel times for Downtown Section - Out bound 11:31 10:05 08:38 07:12 05:46 Actual Avg TT Scheduled Avg TT 04:19 02:53 01:26 00: Time interval Hrs

19 Total Boarding and Alighting Variation in LRT Stations in NE Line Boarding Alighting Bridgeland Zoo Barlow Franklin Marlborough Rundle Whitehorn

20 Passengers per Day Hourly Variation of Passengers Boarding in the NE LRT Line Whitehorn Rundle 3000 Marlborough Franklin Barlow Zoo Bridgeland Time Hrs

21 Passenger per hr Hourly Variation of Passenger Alighting in LRT Whitehorn Rundle 3000 Marlborough Franklin Barlow 2000 Zoo Bridgeland

22 Reliability of LRT for the inbound direction is satisfactory compared to the outbound direction Too many early departures have occurred due to poor scheduling in downtown section Schedule has been created assuming minimal delays in traffic, efficient boarding and alighting, no doors held. The fixed time traffic signals provide a granularity to the schedule in increments of 90 seconds (if the window is missed the delays occur in increments of 90 seconds) When the headways are 2-5 minutes and a delay in one train will accumulate delay in other trains in both directions

23 Non availability of passenger count information will be a constraint in optimizing the schedule for LRT Demand oriented schedule should be designed for both directions of LRT Schedule should be designed in at least half minute (30 seconds) intervals since all signal lights are designed in seconds for green red and amber

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