Summary Of NFPA-130 Analysis Of Proposed CTA Station .
I-290 Phase I StudySummary of NFPA-130 Analysis ofProposed CTA Station Platform WidthsMay 2016INTRODUCTIONAs part of the I-290 reconstruction phase I study, IDOT has coordinated with the CTA regardingthe availability of parallel CTA ROW for expressway improvements in the constrained section ofthe corridor, generally between Austin Boulevard and Circle Avenue. There are three existingCTA Blue Line stations within this section, Austin, Oak Park, and Harlem. Through coordinationand collaboration with the CTA and CTA Blue Line Vision Study, CTA has determined that up toa 10’ foot strip of existing CTA ROW is available for expressway improvements, and that theremaining CTA ROW would accommodate CTA’s Blue Line rail modernization needs. IDOT hasdetermined that the 10’ of ROW would be used to accommodate wider expressway shouldersthat will result in improved expressway safety performance.The CTA Blue Line Vision Study concluded that as part of the Blue Line modernization needs,Austin, Oak Park, and Harlem stations would remain in place and that they would continue to beaccessible via dual head houses located at the adjacent cross streets and track level platformaccess would continue to be end loaded as it is today. The Blue Line Vision study alsoconcluded that a third or express track is not needed and is not proposed as part of themodernization.The CTA requires a minimum 13.5-foot maintenance offset between the expressway barrier andthe centerline of the closest track to accommodate maintenance activities and the south trackexisting alignment would be maintained. Assuming an expressway improvement that utilizes upto 10 ft. of CTA right-of-way to accommodate wider shoulders and/or lanes, and a 13.5 ft.maintenance offset, the resulting space available for platform widths were determined andevaluated assuming that the south track would remain on its current alignment and the northtrack would be shifted to accommodate wider platforms. The new platform widths at the threestations in this section would be: Austin – 18.4’, Oak Park – 17.9’, and Harlem 20.9’. Thefollowing figure illustrates how the ROW is proposed to be allocated, and more detailed planand elevation exhibits are attached. NO CSX ROW is utilized based upon coordination withCSX.Page 1 of 4\\AMCHGFIL01\Chgf2\DEPARTMENTAL SHARES\Projects\I-290\6.0 - Project Deliverables\6.4-Alternate Geometric Studies\6.4.9CTA Facilities-Stations\NFPA 130 Eval\I-290 - CTA Platform NFPA 130 Memo 2016-May-3a.docx
I-290 Phase I StudySummary of NFPA-130 Analysis ofProposed CTA Station Platform WidthsMay 2016The CTA stated that the proposed widths are adequate for the number of passengers, andrequested that IDOT evaluate the proposed platform widths to determine if the widths wouldmeet the NFPA-130 fire code egress time requirements. This document summarizes theassumptions and findings of a feasibility analysis to modify three (3) existing CTA Blue LineForest Park Branch stations with respect to meeting the National Fire Protection Association(NFPA) -130 Standards for Fixed Guideway Transit and Passenger Rail Systems, Version 2014.This analysis was conceptual in nature to determine if the proposed platform widths couldfundamentally meet fire code requirements. Further and more detailed fire codes safetyanalysis will be required during final design to account for any proposed platform features /amenities, obstructions, which would be fully detailed at that time.EXISTING CONDITIONSThe existing CTA’s Blue Line Harlem, Austin and Oak Park Stations are original to the 1950design and construction. CTA platforms and tracks are located between I-290 and CSX. Theplatforms are located at the expressway level, with elevated stationhouses located each /opposite end(s) of the platforms at the cross-road level. The stationhouses provide access to /from the platforms via end loaded ramps or stairs that run in line with platforms. The platformsand stationhouses currently do not meet NFPA 130 -2014 standards for egress capacity.Each station is located between, and accessible via two adjacent local streets. Therefore thetravel distance, from platform to point of safety (the street) for each station, is given. At aconceptual level, the elements that can most positively affect the reduction of evacuation timeare increasing clear widths of stairs and ramps from the platforms to stationhouses, andincreasing clear widths and / or quantities of fare gates, emergency exit gates and doors at thestationhouses to the point(s) of safety.Although though the goal of this analysis was to investigate proposed platform widths and theirability to comply with egress standards of NFPA 130 – 2014, it was necessary to assess theperformance of the facilities as a whole, including the street level stationhouse exits. Thestructure of NFPA requirements assess the egress though the entire facility as a completeevacuation system. The system can be determined to be non-compliant if a single element in asystem, such as emergency exit doors, are under-designed / inadequate; because that oneelement will cause a bottleneck and short-circuit the evacuation system as a whole.The distances proposed for egress travel over the platforms are within the parameters set forthby NFPA 130 – 2014. The regulation stipulates that travel distance on a platform to means ofegress (stair or pedestrian ramp) be no greater than 325’ (100m). The existing passengerloads, provided by the CTA, and travel distances used to conduct the analysis are as follow:Travel Distance (feet)Platform toPlatformStationhouseStation HouseStationOccupantLoad(persons)Harlem Station131826032335Austin Station142026030582Oak Park Station1466260288100Page 2 of 4\\AMCHGFIL01\Chgf2\DEPARTMENTAL SHARES\Projects\I-290\6.0 - Project Deliverables\6.4-Alternate Geometric Studies\6.4.9CTA Facilities-Stations\NFPA 130 Eval\I-290 - CTA Platform NFPA 130 Memo 2016-May-3a.docx
I-290 Phase I StudySummary of NFPA-130 Analysis ofProposed CTA Station Platform WidthsMay 2016To develop NFPA compliant conceptual configurations, this analysis considered the clear widthof vertical circulation elements, stationhouse egress elements, and station exits to evacuate thestation occupant loads over the travel distances noted above.METHODOLOGYThe analysis was conducted assuming proposed concepts developed as part of the I-290 PhaseI Study including proposed crossroad bridge & sidewalk widths, ADA accessibility (ADA Rampsor elevators), and previously collected data. As this was a conceptual analysis of a proposedconcept, a site survey of existing physical conditions was not conducted to verify configurationof existing station elements or potential compliance. The data used to conduct this analysis wasprimarily from, existing plans, diagrams, and tables noting: Platform width and length Vertical circulation type (ramp and / or stair), length and height of travel Station depth (including sidewalk) Distance from the back of curb in front of one stationhouse to the back of curb to theopposite stationhouse Maximum train car capacity and number of cars per train (consist) Entraining occupant load by station turnstile entries Number of trains (headways) per hour of CTA Blue Line trains at peak periods byscheduleNFPA 130 – 2014 requires sufficient egress capacity to evacuate the platform occupant loadfrom the station platform in 4 minutes or less and that the station shall be designed to permitevacuation from the most remote point on the platform to a point of safety in 6 minutes or less.In order to anticipate and eliminate bottlenecks while evacuating stations NFPA 130 guidelinesset forth calculations that assess egress time by: Occupant loads Travel distances Platform exit capacities (clear width of stairs and pedestrian ramps) Egress element capacity (clear width of fare gates, emergency exit gates and doorsto safe area)Per the NFPA standard the flow of egress should be consistent, minimizing / eliminatingbottlenecks, across the platform, up / down the vertical circulation (stair and / or pedestrianramp), through stationhouse egress elements such as turnstiles, roto gates, accessible faregates, emergency exit gates and out of the station exit doors / gates to a point of safety. Itassesses compliance by means of two tests: Test 1 - The station occupant load must egress the platform in 4 minutes or less Test 2 - Egress the entire facility to safe area (usually the street) in 6 minutes or less.Occupant loads for the analysis were determined by assuming a worst case scenario in that alltrains traveling in the direction of peak flow would be filled to crush capacity, as stipulated byCTA (8 car trains with a maximum capacity of 100 passengers per car 800 passengers) andPage 3 of 4\\AMCHGFIL01\Chgf2\DEPARTMENTAL SHARES\Projects\I-290\6.0 - Project Deliverables\6.4-Alternate Geometric Studies\6.4.9CTA Facilities-Stations\NFPA 130 Eval\I-290 - CTA Platform NFPA 130 Memo 2016-May-3a.docx
I-290 Phase I StudySummary of NFPA-130 Analysis ofProposed CTA Station Platform WidthsMay 2016half capacity in reverse peak flow direction (8 car trains with a maximum capacity of 50passengers per car 400 passengers). Entraining loads were estimated by taking actual 2013counts and data from the Rail OD Model, scaling up to match May 2015 station entries, thendividing the hourly counts by the number of trains per hour, at the time of peak travel. Per therequirements for NFPA 130 – 2014, the largest entraining loads were then doubled to estimatea condition where a one (1), eight (8) car train does not arrive and the entraining load for twotrains are waiting on the platform at the time of evacuation.Using this data, the analysis evaluated the proposed platform widths to determine if they couldconceptually meet the egress time requirements of NFPA 130 – 2014. The proposed platformwidths analyzed were as follows: Harlem Station at 18.4’ (18’- 4¾”) Austin Station at 20.9’ (20’- 10¾”) Oak Park Station at 17.9’ (17’- 10¾”)FINDINGSThe platform widths as proposed for Harlem, Austin and Oak Park Stations could conceptuallyevacuate their platforms and stationhouses, to the sidewalk outside the stationhouse as thepoint of safety, in the times noted below:StationPlatform Exit Flow Time 4 min.Total Exit Time 6 min.Harlem Station3.215.99Austin Station3.125.77Oak Park Station3.175.98All platform exit flow times are significantly lower than the required maximum limit of 4 minuteswhereas total exit time is at the limit of 6 minutes.The analysis indicates that the limiting factor in the platform / station configurations related moreto the configuration of stationhouse egress barriers (turnstiles, roto gates, accessible fare gates,emergency exit gates and station exit doors / gates) than to the width of the platforms. HarlemStation’s platform exit flow time is significantly lower than the required 4 minutes, however theproposed platform width is very close to the clear width required to accommodate verticalcirculation elements to achieve this evacuation time. This will require further investigation indesign.To analyze compliance with minimum egress time requirements of NFPA 130 -2014, theconceptual proposed platform width analysis also assumed overall egress systemimprovements including stationhouses, turnstiles, roto gates, fare gates, emergency exit gates,exit doors, and revised ADA compliant vertical circulation elements (pedestrian ramps andelevator). The analysis indicates that the proposed platform widths can be compliant as part ofan overall egress system, but that all system elements need to be configured appropriately.Simply increasing platform widths beyond the proposed dimensions (and thereby the clearwidths of vertical circulation elements) is not a key driver in reducing total evacuation time perNFPA 130 - 2014.Page 4 of 4\\AMCHGFIL01\Chgf2\DEPARTMENTAL SHARES\Projects\I-290\6.0 - Project Deliverables\6.4-Alternate Geometric Studies\6.4.9CTA Facilities-Stations\NFPA 130 Eval\I-290 - CTA Platform NFPA 130 Memo 2016-May-3a.docx
AUSTIN STATION4/25/2016EXITING CALCULATIONS PER NFPA 130-2014Application (1.3)1.3.1 This standard shall apply to new fixed guideway transit and passenger rail systems and to extensions of existing systemsDeffinitionspim persons per inch per minuteppm people per minuteMax Travel Distance on a platform to means of egress route 325 feet (100m)Alternate Egress (5.3.3.7): At least two means of egress remote from each other shall be provided from each station platform (Emergency Exits)Platforms, Corridors, and Ramps (5.3.4)Platforms Corridors and ramps minimum clear width 44 inches (5.3.4.1)Means of egress capacity of platforms, corridors, and ramps shall be deducted by 12 inch at each sidewall and 18 inch at each platform edge (5.3.4.2)Platforms, corridors, and ramps egress capacity 2.08 pim (5.3.4.3) x width of platform, corridor, or ramp - (minus) sidewall deduction (12inches) - (minus) platform edgededuction (18 inches x both edges if applicable) as applicable.Platforms, corridors, and ramps egress travel speed 124 fpm (5.3.4.4)Travel speed for concourses and other areas where lesser pedestrian density is anticipated 200fpm (5.3.4.5)Stairs and Escalators (5.3.5)Means of egress stairs Minimum 44 inches (5.3.5.2)Egress capacity 1.41 pim x clear width of stairs (5.3.5.3 (1))Egress travel speed 48 fpm (5.3.5.3 (2))Doors, Gates and Exit Hatches (5.3.7)Egress capacity for single leaf doors and gates Maximum of 60 ppm (5.3.7.1(1))2.08 pim for biparting multileaf doors and gates measured for the clear width dimension (5.3.7.1(2))Fare Barriers (5.3.8)Turnstyle exit capacity 25 ppm (5.3.8.5(3) (a))FINAL Blue Line Stations NFPA 130 Analysis1 of 12
AUSTIN STATION4/25/2016CENTER PLATFORM OCCUPANT LOAD CALCULATIONFull Train Load / Crush LoadActual Train Load in Reverse Peak DirectionPeak 15 Minute Entraining Load (estimated)Cars/ TrainOccupants/ Car88Entraining Load10050Headway Time11015 minutesTracks (one train Train Occupant Loadper track)18001400One MissedPeak Entraining LoadHeadway2220Platform OccupantLoad (POC)1420PLATFORM EXIT CAPACITIESCenter PlatformRamp to StationhouseEmergency Exit Stairs to Safe AreaDirectionupdnQuantity20Width (inches)Capacity (pim)Total Capacity (ppm)124.02.08515.840.01.410.00Platform Exit Capacity (PEC)516Egress ElementsStationhouse Fare BarrierTurnstilesRotoGatesAccessible Fare GateEmergency Exit GateDirectionQuantityn/an/an/an/a8222Fare Barrier to Safe Area (Unpaid Area toExterior)Single leaf doors and gates (minimum 36 incheswide)Pairs of doors or gates (no center mullion)DirectionQuantityWidth (inches)Capacity (pim)Total Capacity (ppm)n/a00.0600n/a472.02.08Safe Area Exit Capacity (SAEC)EGRESS ELEMENT - EXIT CAPACITIESFINAL Blue Line Stations NFPA 130 AnalysisWidth (inches)Capacity (ppm)n/a25n/a2536.06036.060Fare Array Exit Capacity (FBEC)Total Capacity (ppm)200501201204905995992 of 12
AUSTIN STATION4/25/2016WALKING TIME FOR LONGEST EXIT ROUTEElement - Austin Blvd. (This is the longer of thetwo exit routs)Platform to Safe AreaTravel Time on PlatformPlatform to Stationhouse (ramp)Stationhouse to Safe Area (to outside)SymbolLength (feet)fpmWalking Time Total Walking Time (T)STATIONHOUSE OCCUPANT LOADPlatform Occ Load Platform Exit Flow Time(POC)(fpi)Stationhouse Occupant Load(POC - fpi x Emergency Stairs Exit Capacity)14202.75Emergency Stair Emergency Stair Occ.CapacityLoad00Total Stationhouse Occupant LoadTotal StationhouseOcc. Load14201420TEST NO. 1 - TIMED EXIT CALCULATIONS - CENTER PLATFORM (in miutes)ElementPlatform Exit Flow Time (time to clear platform)(Fpi POC/IPEC)Waiting Time @ Platform ExitsWaiting Time at Platform Exits (W pi Fpi - T1)FINAL Blue Line Stations NFPA 130 AnalysisSymbolFpiPlatform Occupant Load(POC)1420Platform ExitCapacity (PEC)516SymbolWpExit Flow Time (Fp)2.75Travel Time (T1)2.10Platform Exit FlowTime (fpi)2.754 Min. Max.PlatformExit Flow TimeExit Flow Time 4minutesWaiting Times (Wp)0.663 of 12
AUSTIN STATION4/25/2016TEST NO. 2 - TIMED EXIT CALCULATIONS - STATIONHOUSE (in miutes)ElementFlow Time @ Fare Barrier(Station Occupant Load / FBEC)Waiting Time @ Fare BarrierWaiting Time (minutes) at Fare Barrier(W fb Ffb - Fp)ElementFlow Time @ Stationhouse Exits(Stationhouse Occupant Load / SAEC)ElementWaiting Time @ Stationhouse ExitsWaiting Time @ Stationhouse Exits((Fs - max (Ffb or Fp))SymbolFfbSymbolW fbSymbolFsSymbolWsStationhouse Occ. Load Fare Barrier ExitCapacity1420490Fare Barrier Exit FlowTime2.90Fare Barrier Exit FlowTime2.90Platform ExitFlow Time2.75Waiting time at FareBarrier0.15Stationhouse OccupancyLoad1420StationhouseExit Capacity599Stationhouse ExitFlow Time2.37Stationhouse Exit FlowTimeFs2.37Platform ExitFlow TimeFpi2.75max (Ffb or Fp) Fare Barrier ExitFlow TimeFfb2.90Waiting Time atStation Exits(W s)0.002.90TOTAL EXIT TIME (Platform to Safe Area) (in miutes)Total Exit Time T W p W fb W sTotal Walk TimeTPlatform Wait TimeWpFair Barrier WaitTime WfbStation House ExitWait Time WsTotal Exit TimeReq. 6 min4.970.660.150.005.77Total Exit Time 6minutesOriginal spreadsheet by: Muller Muller ArchitectsFINAL Blue Line Stations NFPA 130 Analysis4 of 12
HARLEM STATION4/25/2016EXITING CALCULATIONS PER NFPA 130-2014Application (1.3)1.3.1 This standard shall apply to new fixed guideway transit and passenger rail systems and to extensions of existing systemsDeffinitionspim persons per inch per minuteppm people per minuteMax Travel Distance on a platform to means of egress route 325 feet (100m)Alternate Egress (5.3.3.7): At least two means of egress remote from each other shall be provided from each station platform (Emergency Exits)Platforms, Corridors, and Ramps (5.3.4)Platforms Corridors and ramps minimum clear width 44 inches (5.3.4.1)Means of egress capacity of platforms, corridors, and ramps shall be deducted by 12 inch at each sidewall and 18 inch at each platform edge (5.3.4.2)Platforms, corridors, and ramps egress capacity 2.08 pim (5.3.4.3) x width of platform, corridor, or ramp - (minus) sidewall deduction (12inches) - (minus) platform edgededuction (18 inches x both edges if applicable) as applicable.Platforms, corridors, and ramps egress travel speed 124 fpm (5.3.4.4)Travel speed for concourses and other areas where lesser pedestrian density is anticipated 200fpm (5.3.4.5)Stairs and Escalators (5.3.5)Means of egress stairs Minimum 44 inches (5.3.5.2)Egress capacity 1.41 pim x clear width of stairs (5.3.5.3 (1))Egress travel speed 48 fpm (5.3.5.3 (2))Doors, Gates and Exit Hatches (5.3.7)Egress capacity for single leaf doors and gates Maximum of 60 ppm (5.3.7.1(1))2.08 pim for biparting multileaf doors and gates measured for the clear width dimension (5.3.7.1(2))Fare Barriers (5.3.8)Turnstyle exit capacity 25 ppm (5.3.8.5(3) (a))FINAL Blue Line Stations NFPA 130 Analysis5 of 12
HARLEM STATION4/25/2016CENTER PLATFORM OCCUPANT LOAD CALCULATIONFull Train Load / Crush LoadActual Train Load in Reverse Peak DirectionPeak 15 Minute Entraining Load (estimated)Cars/ TrainOccupants/ Car88Entraining Load10050Headway Time5915 minutesTracks (one train Train Occupant Loadper track)18001400One MissedPeak Entraining LoadHeadway2118Platform OccupantLoad (POC)1318PLATFORM EXIT CAPACITIESCenter PlatformRamp to StationhouseStair to StationhouseEmergency Exit Stairs to Safe AreaDirectionupupdnQuantity110Egress ElementsStationhouse Fare BarrierTurnstilesRotoGatesAccessible Fare GateEmergency Exit GateDirectionQuantityn/an/an/an/a6113Fare Barrier to Safe Area (Unpaid Area toExterior)Single leaf doors and gates (minimum 36 incheswide)Pairs of doors or gates (no center mullion)DirectionQuantityn/a0n/a4Width (inches)Capacity (pim)Total Capacity rm Exit Capacity (PEC)410EGRESS ELEMENT - EXIT CAPACITIESFINAL Blue Line Stations NFPA 130 AnalysisWidth (inches)Capacity (ppm)n/a25n/a2536.06036.060Fare Array Exit Capacity (FBEC)Width (inches)Total Capacity (ppm)1502560180415Capacity (pim)Total Capacity (ppm)60072.02.08Safe Area Exit Capacity (SAEC)5995996 of 12
HARLEM STATION4/25/2016WALKING TIME FOR LONGEST EXIT ROUTEElement - Circle Ave. (This is the longer of thetwo exit routs)Platform to Safe AreaTravel Time on PlatformPlatform to Stationhouse (ramp)Stationhouse to Safe Area (to outside)SymbolLength (feet)fpmWalking Time Total Walking Time (T)STATIONHOUSE OCCUPANT LOADPlatform Occ Load Platform Exit Flow Time(POC)(fpi)Stationhouse Occupant Load(POC - fpi x Emergency Stairs Exit Capacity)13183.21Emergency Stair Emergency Stair Occ.CapacityLoad00Total Stationhouse Occupant LoadTotal StationhouseOcc. Load13181318TEST NO. 1 - TIMED EXIT CALCULATIONS - CENTER PLATFORM (in miutes)ElementPlatform Exit Flow Time (time to clear platform)(Fpi POC/IPEC)Waiting Time @ Platform ExitsWaiting Time at Platform Exits (W pi Fpi - T1)FINAL Blue Line Stations NFPA 130 AnalysisSymbolFpiPlatform Occupant Load(POC)1318Platform ExitCapacity (PEC)410SymbolWpExit Flow Time (Fp)3.21Travel Time (T1)2.10Platform Exit FlowTime (fpi)3.214 Min. Max.PlatformExit Flow TimeExit Flow Time 4minutesWaiting Times (Wp)1.127 of 12
HARLEM STATION4/25/2016TEST NO. 2 - TIMED EXIT CALCULATIONS - STATIONHOUSE (in miutes)ElementFlow Time @ Fare Barrier(Station Occupant Load / FBEC)Waiting Time @ Fare BarrierWaiting Time (minutes) at Fare Barrier(W fb Ffb - Fp)ElementFlow Time @ Stationhouse Exits(Stationhouse Occupant Load / SAEC)ElementWaiting Time @ Stationhouse ExitsWaiting Time @ Stationhouse Exits((Fs - max (Ffb or Fp))SymbolFfbSymbolW fbSymbolFsSymbolWsStationhouse Occ. Load Fare Barrier ExitCapacity1318415Fare Barrier Exit FlowTime3.18Fare Barrier Exit FlowTime3.18Platform ExitFlow Time3.21Waiting time at FareBarrier0.00Stationhouse OccupancyLoad1318StationhouseExit Capacity599Stationhouse ExitFlow Time2.20Stationhouse Exit FlowTimeFs2.20Platform ExitFlow TimeFpi3.21max (Ffb or Fp) Fare Barrier ExitFlow TimeFfb3.18Waiting Time atStation Exits(W s)0.003.21TOTAL EXIT TIME (Platform to Safe Area) (in miutes)Total Exit Time T W p W fb W sTotal Walk TimeTPlatform Wait TimeWpFair Barrier WaitTime WfbStation House ExitWait Time WsTotal Exit TimeReq. 6 min4.881.120.000.005.99Total Exit Time 6minutesOriginal spreadsheet by: Muller Muller ArchitectsFINAL Blue Line Stations NFPA 130 Analysis8 of 12
OAK PARK STATION4/25/2016EXITING CALCULATIONS PER NFPA 130-2014Application (1.3)1.3.1 This standard shall apply to new fixed guideway transit and passenger rail systems and to extensions of existing systemsDeffinitionspim persons per inch per minuteppm people per minuteMax Travel Distance on a platform to means of egress route 325 feet (100m)Alternate Egress (5.3.3.7): At least two means of egress remote from each other shall be provided from each station platform (Emergency Exits)Platforms, Corridors, and Ramps (5.3.4)Platforms Corridors and ramps minimum clear width 44 inches (5.3.4.1)Means of egress capacity of platforms, corridors, and ramps shall be deducted by 12 inch at each sidewall and 18 inch at each platform edge (5.3.4.2)Platforms, corridors, and ramps egress capacity 2.08 pim (5.3.4.3) x width of platform, corridor, or ramp - (minus) sidewall deduction (12inches) - (minus) platform edgededuction (18 inches x both edges if applicable) as applicable.Platforms, corridors, and ramps egress travel speed 124 fpm (5.3.4.4)Travel speed for concourses and other areas where lesser pedestrian density is anticipated 200fpm (5.3.4.5)Stairs and Escalators (5.3.5)Means of egress stairs Minimum 44 inches (5.3.5.2)Egress capacity 1.41 pim x clear width of stairs (5.3.5.3 (1))Egress travel speed 48 fpm (5.3.5.3 (2))Doors, Gates and Exit Hatches (5.3.7)Egress capacity for single leaf doors and gates Maximum of 60 ppm (5.3.7.1(1))2.08 pim for biparting multileaf doors and gates measured for the clear width dimension (5.3.7.1(2))Fare Barriers (5.3.8)Turnstyle exit capacity 25 ppm (5.3.8.5(3) (a))FINAL Blue Line Stations NFPA 130 Analysis9 of 12
OAK PARK STATION4/25/2016CENTER PLATFORM OCCUPANT LOAD CALCULATIONFull Train Load / Crush LoadActual Train Load in Reverse Peak DirectionPeak 15 Minute Entraining Load (estimated)Cars/ TrainOccupants/ Car88Entraining Load10050Headway Time13315 minutesTracks (one train Train Occupant Loadper track)18001400One MissedPeak Entraining LoadHeadway2266Platform OccupantLoad (POC)1466PLATFORM EXIT CAPACITIESCenter PlatformRamp to StationhouseEmergency Exit Stairs to Safe AreaDirectionupdnQuantity20Width (inches)Capacity (pim)Total Capacity (ppm)112.02.08465.920.01.410.00Platform Exit Capacity (PEC)466Egress ElementsStationhouse Fare BarrierTurnstilesRotoGatesAccessible Fare GateEmergency Exit GateDirectionQuantityn/an/an/an/a7222Fare Barrier to Safe Area (Unpaid Area toExterior)Single leaf doors and gates (minimum 36 incheswide)Pairs of doors or gates (no center mullion)DirectionQuantityWidth (inches)Capacity (pim)Total Capacity (ppm)n/a00.0600n/a472.02.08Safe Area Exit Capacity (SAEC)EGRESS ELEMENT - EXIT CAPACITIESFINAL Blue Line Stations NFPA 130 AnalysisWidth (inches)Capacity (ppm)n/a25n/a2536.06036.060Fare Array Exit Capacity (FBEC)Total Capacity (ppm)1755012012046559959910 of 12
OAK PARK STATION4/25/2016WALKING TIME FOR LONGEST EXIT ROUTEElement - East Ave. (This is the longer of thetwo exit routs)Platform to Safe AreaTravel Time on PlatformPlatform to Stationhouse (ramp)Stationhouse to Safe Area (to outside)SymbolLength (feet)fpmWalking Time 2Total Walking Time (T)STATIONHOUSE OCCUPANT LOADPlatform Occ Load Platform Exit Flow Time(POC)(fpi)Stationhouse Occupant Load(POC - fpi x Emergency Stairs Exit Capacity)14663.15Emergency Stair Emergency Stair Occ.CapacityLoad00Total Stationhouse Occupant LoadFINAL Blue Line Stations NFPA 130 AnalysisTotal StationhouseOcc. Load1466146611 of 12
OAK PARK STATION4/25/2016TEST NO. 1 - TIMED EXIT CALCULATIONS - CENTER PLATFORM (in miutes)ElementSymbolPlatform Exit Flow Time (time to clear platform)(Fpi POC/IPEC)Waiting Time @ Platform ExitsWaiting Time at Platform Exits (W pi Fpi - T1)FpiPlatform Occupant Load(POC)1466Platform ExitCapacity (PEC)466SymbolWpExit Flow Time (Fp)3.15Travel Time (T1)2.10Platform Exit FlowTime (fpi)3.154 Min. Max.PlatformExit Flow TimeExit Flow Time 4minutesWaiting Times (Wp)1.05TEST NO. 2 - TIMED EXIT CALCULATIONS - STATIONHOUSE (in miutes)ElementFlow Time @ Fare Barrier(Station Occupant Load / FBEC)Waiting Time @ Fare BarrierWaiting Time (minutes) at Fare Barrier(W fb Ffb - Fp)ElementFlow Time @ Stationhouse Exits(Stationhouse Occupant Load / SAEC)ElementWaiting Time @ Stationhouse ExitsWaiting Time @ Stationhouse Exits((Fs - max (Ffb or Fp))SymbolFfbSymbolW fbSymbolFsSymbolWsStationhouse Occ. Load Fare Barrier ExitCapacity1466465Fare Barrier Exit FlowTime3.15Fare Barrier Exit FlowTime3.15Platform ExitFlow Time3.15Waiting time at FareBarrier0.01Stationhouse OccupancyLoad1466StationhouseExit Capacity599Stationhouse ExitFlow Time2.45Stationhouse Exit FlowTimeFs2.45Platform ExitFlow TimeFpi3.15max (Ffb or Fp) Fare Barrier ExitFlow TimeFfb3.15Waiting Time atStation Exits(W s)0.003.15TOTAL EXIT TIME (Platform to Safe Area) (in miutes)Total Exit Time T W p W fb W sTotal Walk TimeTPlatform Wait TimeWpFair Barrier WaitTime WfbStation House ExitWait Time WsTotal Exit TimeReq. 6 min4.921.050.010.005.98Total Exit Time 6minutesOriginal spreadsheet by: Muller Muller ArchitectsFINAL Blue Line Stations NFPA 130 Analysis12 of 12
May 09, 2016 · The existing CTA’s Blue Line Harlem, Austin and Oak Park Stations are original to the 1950 design and construction. CTA platforms and tracks are located between I-290 and CSX. The platforms are located at the expressway level, with elevated stationhouses located each / opposite end(s) of the platforms at the cross-road level.
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