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TABLE A-2 UNINTERRUPTED FLOW Failure Average Dwell Time, Seconds Rate 10 20 30 40 50 60 1.00% 92 57 41 32 27 23 2.50% 98 62 45 35 29 25 5.00% 103 66 48 38 31 27 7.50% 107 69 51 40 33 28 10% 110 71 56 45 37 32 15% 145 76 56 45 37 32 20% 120 78 60 48 40 34 25% 24 84 63 55 42 36 30% 128 87 66 53 45 38 50% 144 103 80 65 55 48 SIGNALIZED WITH GREEN/CYCLE = 0.5 TCRP A-23 Implementation Guidelines for Bus Rapid Transit Page A-10 Final Report â June 2003 Failure Average Dwell Time, Seconds Rate 1.00% 53 34 25 20 16 14 2.50% 57 37 28 22 18 16 5.00% 60 40 30 24 20 17 7.50% 63 43 32 26 27 19 10% 65 45 34 27 23 20 15% 69 48 37 30 25 22 20% 72 51 40 33 28 24 25% 75 54 43 35 30 26 30% 78 58 46 38 32 28 50% 90 72 60 51 45 40 TCRP A-23 Implementation Guidelines for Bus Rapid Transit Page A-9 Final Report â June 2003 TABLEA-1 VALUES OF PERCENT FAILURE AND ASSOCIATED ONE TAIL NORMAL VARIATION Failure (%) Z a 1.0 2.330 2.5 1.960 5.0 1.645 7.5 1.440 10.0 1.280 15.0 1.040 20.0 0.840 25.0 0.675 30.0 0.525 50.0 0.000
TCRP A-23 Implementation Guidelines for Bus Rapid Transit Page A-12 Final Report â June 2003 TABLE A-3 EFFICIENCY OF MULTIPLE BERTHS Effective Berth Factor, Nb TCRP A-23 Implementation Guidelines for Bus Rapid Transit Page A-11 Final Report â June 2003 Berth No. On-line Stops Off-line Stops 1 1.00 1 2 1.75 1.85 3 2.45 2.60 4 2.65 3.25 5 2.75 3.75 SOURCES: 1. Special Report 209: Highway Capacity Manual, Transportation Research Board, National Research Council, Washington, D.C., 1985 (1994 and 1997 and 2000 updates). 2. Operational Analysis of Bus Lanes on Arterials â Application and Refinement, Research Results Digest â September 2000, Number 38, Transit Cooperative Research Program, Transportation Research Board, National Research Council, Washington, DC.
TABLE A-4 TYPICAL SERVICE VOLUMES TCRP A-23 Implementation Guidelines for Bus Rapid Transit Page A-13 Final Report â June 2003 BUS/FARE COLLECTION Arterial 50% Green/Cycle Grade Separated Busway Type of Bus Regular Articulated Regular Articulated Door Channels Available for Boarding 1 2 2 2 2 3 1 2 2 3 Fare Collection On Off Off On Off Of f Off Off Off Off Vehicle Vehicle Vehicle Vehicle Service Time Per Passenger Door (1)(2) 3.5 2.5 2 2.5 2 1.5 2.5 2 2 1.5 Passengers Boarding/Bus 25 15 15 20 20 20 15 15 20 20 DWELL TIME (Seconds) Passenger Boarding Time 52 38 30 50 40 30 38 30 40 30 Adjustment Factor for Random Variations(3) 0.905 0.905 0.905 0.905 0.905 0.905 1.405 1.405 1.405 1.405 Effective Dwell Time 47 34 27 45 36 27 53 42 56 42 Clearance Time 15 15 15 15 15 15 15 15 15 15 Effective Dwell Time, Plus Clearance 62 49 42 60 51 42 68 50 71 57 BUSES & PASSENGERS/HOUR Buses/Berth/Hour 29 37 43 30 35 45 53 63 51 63 Passengers/Berth/Hour 435 550 645 600 705 855 795 945 1020 1260 Effective berths 2.52.52.52.52.52.52.52.52.5 2.5 Passengers/Berth/Hour 1090 1375 1610 1500 1765 2145 1990 2360 2550 3150 PASSENGERS PER HOUR PAST MAXIMUM LOAD SECTION 25% Board at Busiest Station 4360 5500 6440 6000 7060 8570 7960 9440 10200 12600 50% Board at Busiest Station 2180 2750 3220 3000 3530 4290 3980 4720 5100 6300 1. Assumes Loading Conditions Govern 2. Service Time/Door Adjusted to reflect use of multiple doors, e.g. from 1 to 2 doors gives a 0.7 value 3. Effective Service Time = [1+(.675)(.6)] or 1.455 for uninterrupted flow, and [.5+.675(.6)] or .905 for a g/c of 0.5 for interrupted Flow to account for likely variations per hour applied to passenger boarding 4. Capacity equals 1800 divided by effective dwell plus clearance for signalized intersections (g/c = 0.5) and 3600 divided by Effective dwell plus clearance time uninterrupted flow (g/c = 1.0) TC RP A -2 3 Im pl em en ta tio n G ui de lin es fo r B us R ap id T ra ns it Pa ge A -1 4 Fi na l Re po rt â Ju ne 2 00 3
TABLEA-5 BERTH REQUIREMENTS AT BUS STOPS (Outlying Locations) TCRP A-23 Implementation Guidelines for Bus Rapid Transit Page A-15 Final Report â June 2003 Number of Berths When Service Time at Stop is Peak Hour Headway 10 20 30 40 50 60 Bus Flow (Min.) Sec. Sec. Sec. Sec. Sec. Sec. (Bus/Hr.) 15 4 1 1 1 1 1 1 30 2 1 1 1 1 1 1 45 1 1 2 2 2 2 60 1 1 1 2 2 2 2 75 1 2 2 3 3 3 90 1 2 3 3 4 4 105 1 2 3 3 4 4 120 1 2 3 3 5 5 150 2 3 3 4 5 5 180 1/3 1/2 2 3 4 5 6 6 NOTE: 95% probability that number of berths will not be overloaded; assumes a Poisson Distribution of Bus Arrivals.
