Transcription
7281 EAST GUNGAHLIN HIGH SCHOOL KENNY TIATRANSPORT IMPACT ASSESSMENT REPORTFOREAST GUNGAHLIN HIGH SCHOOL, KENNYNOVEMBER 2020CANBERRASYDNEYWOLLONGONGWeb: www.indesco.com.auCQ1, Level 5,Suite 401 Level 4Suite 1 Ground FloorEmail: Indesco@indesco.com.au68 Northbourne Avenue24 Hunter Street25 Atchison StreetCanberra City ACT 2601PARRAMATTA NSW 2150WOLLONGONG NSW 2500Phone: (02) 6285 1022Phone: (02) 9633 2273Phone: (02) 4288 4401www.indesco.com.au
7281 EAST GUNGAHLIN HIGH SCHOOL KENNY TIAPROJECT TITLE: East Gungahlin High School Kenny TIAPROJECT NUMBER: 7281Prepared by:B Hodges / H McDonaldDate:26/09/2020Reviewed by:D BeatonDate:26/09/2020Approved by:M MerangeDate:28/09/2020REVISION CONTROLDocumentIssue DateRecipientDetailsFirst Issue30/09/2020IDPM BeljicSecond Issue19/10/2020IDPM BeljicThird Issue06/11/2020IDPM BeljicBase Template:Version: B Feb 2020Ref: 7281 EGHS Kenny TIA rev4.0.docxCOMMERCIAL IN CONFIDENCEwww.indesco.com.au i
7281 EAST GUNGAHLIN HIGH SCHOOL KENNY TIAEXECUTIVE SUMMARYINTRODUCTIONIndesco was engaged by Major Projects Canberra (MPC) on behalf of Transport Canberra and CityServices (TCCS) to undertake a Traffic Impact Assessment (TIA) of the proposed East Gungahlin HighSchool (EGHS). This report summarises the range of analyses and assessments undertaken in relationto the traffic, public transport, active travel, and car parking elements of the proposed development.PROPOSED DEVELOPMENTThe subject site is located on the south side of Well Station Drive, between Old Well Station track andAlbatross Crescent West.The proposed development is a new high school, to service the future Kenny suburb and surroundingarea. The high school is proposed to accommodate 800 students with a capacity extension to 1,000students. The site will also make provision for a primary school (600 students with capacity extensionto 750 students) and a pre-school (44 students).The preliminary school Master Plan, below, shows the proposed high school located in the west half ofthe site, with provision for the primary school and pre-school on the east half. This analysis assumesthat the high school will begin operation in 2023 with the primary school and pre-school beginningoperation in 2031.East Gungahlin High School – Ultimate Internal Layout (Preliminary Master Plan)Vehicle access to the development site is proposed to occur via a School Loop Road along the southand west boundaries of the development site. Under the interim conditions (i.e. when only the highschool is operational) all access to and from the School Loop Road is assumed to occur via an extensionto Albatross Crescent West, along the east boundary of the site. In the ultimate conditions (i.e. when theprimary school and pre-school are operational) an additional left-in, left-out intersection has beenassumed on Well Station Drive at the northwest corner of the development site. Furthermore, drivewayaccess to the pre-school, via the extension to Albatross Crescent West, is assumed under the ultimateconditions. It is noted that the service road along the northern boundary of the school has been omittedfrom this analysis for pedestrian safety reasons and due to the anticipated impacts on the left-in, left-outaccess and bus stops along Well Station Drive.The preliminary school Master Plan shows a total of 221 car parking spaces, distributed as follows:xxx120 car parking spaces for the high school,86 car parking spaces for the primary school, and15 car parking spaces for the pre-school.Ref: 7281 EGHS Kenny TIA rev4.0.docxCOMMERCIAL IN CONFIDENCEwww.indesco.com.au ii
7281 EAST GUNGAHLIN HIGH SCHOOL KENNY TIAPUBLIC TRANSPORTExisting public transport services operating in the vicinity of the proposed EGHS development include:xxThe route 18 bus which operates at approximately 30-minute headways and serves the stops onWell Station Drive at Albatross Crescent West, andThe light rail which operates at between 5 to 10-minute headways and serves the stop onFlemington Road at Well Station Drive.In order to serve the proposed EGHS development, it is recommended to provide the followinginfrastructure under the interim conditions (i.e. prior to the duplication of Well Station Drive and theopening of the primary school and pre-school):xxxxxBus stops (accommodating three buses) on the west side of Albatross Crescent West along theschool frontage,Public route buses to divert via this new stop during school peak times,Turn around facility for buses (roundabout) at the southeast corner of the school site,Traffic signals at the Well Station Drive / Albatross Crescent West intersection, andExisting bus stops on Well Station Drive at Albatross Crescent West to be reconstructed to servepublic route buses during non-school times.It is noted that this interim arrangement is expected to preclude the construction of a driveway accessto the pre-school on the eastern side of the subject site.Ultimately (i.e. after the duplication of Well Station Drive) it is recommended to provide:xxxNew bus stops to be constructed at the Well Station Drive / Kings Canyon intersection to serve bothschool and public route buses,Existing bus stops on Well Station Drive at Albatross Crescent West to be reconstructed to maintainpublic transport network coverage, andBus stop on west side of Albatross Crescent West to be used exclusively for school excursions,camps, etc.ACTIVE TRAVELThe active travel network in the vicinity of the EGHS development site, has been assessed againstactive travel demands calculated based on both expected and aspirational active travel mode splits. Itwas found that a range of improvements are required to cater for the anticipated active travel demands.These include:xxxxxxxxxxWidening of the existing 2.5m wide shared path along the west side of Flemington Road, betweenWell Station Drive and Nullarbor Avenue, to 3.0m wide,A new 3.0m wide shared path on the north side of Well Station Drive, between Kings Canyon Streetand Flemington Road,A new 4.0m wide shared path on the south side of Well Station Drive, between Kings Canyon Streetand Flemington Road,A new 3.0m wide shared path on the south side of Well Station Drive, between Kings Canyon Streetand Albatross Crescent West (along the school frontage),A new 2.5m wide shared path on the east side of Albatross Crescent West, between Well StationDrive and the Kenny West Access Road,A new 3-4m wide shared path on the west side of Albatross Crescent West, between Well StationDrive and the Kenny West Access Road,A new 3-4m wide shared path parallel to the Kenny West Access Road,A signalised pedestrian crossing on Well Station Drive in the vicinity of Albatross Crescent West,A signalised pedestrian crossing on Well Station Drive in the vicinity of Kings Canyon Street, andKerb ramps and connecting paths on Nullarbor Avenue in the vicinity of Adder Street.TRAFFIC ANALYSISThe traffic impacts of the proposed development have been assessed through the use of amicrosimulation model, developed using the Aimsun Next 20 software package and built as an extensionto a previous model prepared by Calibre in 2019. It is noted that due to the process of extending theRef: 7281 EGHS Kenny TIA rev4.0.docxCOMMERCIAL IN CONFIDENCEwww.indesco.com.au iii
7281 EAST GUNGAHLIN HIGH SCHOOL KENNY TIACalibre model and also due to the impact of COVID-19 restrictions on traffic demands, at the time ofmodel development, the model has been calibrated and validated to reflect the 2019 existing conditions.2019 Existing ConditionsUnder the 2019 existing conditions all core intersections operate satisfactorily during each of the three(3) peak hours (AM commuter peak, PM school peak and PM commuter peak). It was however observedthat the maximum queue on the west approach to the Horse Park Drive / Well Station Drive / BettongAvenue intersection extended back to block the upstream Well Station Drive / Nullarbor Avenueintersection (213m queue in 170m storage), during the AM commuter peak hour. Furthermore, the rightturn movement from the north approach at this intersection was found to experience long delays (119s,LOS F) and have a queue that overflowed the short right-turn lane (126m queue in 85m storage). Thisindicates that the intersection is operating at a level approaching capacity under the 2019 existingconditions.Base CasesThe Base Cases represent the conditions on the road network with background growth, the Kennydevelopment, and the Park & Ride facility, but without the proposed EGHS development.Linear annual growth rates were derived from outputs from the Canberra Strategic Transport Model(CSTM). These growth rates were calculated to specifically exclude traffic demands associated with theKenny development (as these would be considered separately). Ultimately background growth rates of1.05% p.a. and 0.60% p.a. were adopted for the analysis.Traffic demands associated with the Kenny development were based on the following assumptions. In2023, the Kenny development would comprise 200 residential dwellings (and no commercialdevelopment), located in the west part of the development area. While in 2031, the Kenny developmentwould be fully occupied and would therefore comprise 1,500 dwellings and 5,000m 2 of commercial floorarea. Traffic demands associated with the Kenny development were then calculated using trafficgeneration rates from the Estate Development Code and RMS NSW Trip Generation publications andwere distributed in accordance with journey to work data for the surrounding area, from the 2016Australian Census.The Park & Ride facility at the south-east corner of Flemington Road / Well Station Drive is assumed toaccommodate 200 parked cars and be operational from 2023. Traffic generation and distribution fromthe previous Calibre model were adopted for consistency.Under the 2023 Base Case – Minimal Road Upgrade scenarios the core intersections are generallyexpected to operate satisfactorily. However, the maximum queues on the east approach to theFlemington Road / Well Station Drive intersection (during the AM commuter, PM school and PMcommuter peak hours) and the west approach to the Horse Park Drive / Well Station Drive intersection(AM commuter peak hour) are expected to extend back to block upstream intersections.On this basis, Works Packages A and B are required to provide access to the Park & Ride Facility andthe initial stage of the Kenny development. Furthermore, Works Packages C and D are recommendedin order to maintain an acceptable level of performance across the road network under the 2023 BaseCase traffic demands.Under the 2031 Base Case scenarios and in addition to those upgrades recommended under the 2023Base Case, Works Package G is required to provide access to the latter stages of the Kennydevelopment. Additionally, Works Package H is recommended to improve the performance of theFlemington Road / Well Station Drive intersection. Furthermore, Works Packages I and K have beenadopted in the modelling to address capacity constraints identified outside the core area of the model.Further analysis into the performance of the Hoskins Street / Well Station Drive and Federal Highway /Horse Park Drive / Majura Parkway intersections is required. Finally, Works Package J has also beenincluded to address geometric constraints that arise from the inclusion of Works Package I.EGHS CasesThe EGHS Cases represent the conditions on the road network with background growth, the Kennydevelopment, the Park & Ride facility and also with the proposed EGHS development.Ref: 7281 EGHS Kenny TIA rev4.0.docxCOMMERCIAL IN CONFIDENCEwww.indesco.com.au iv
7281 EAST GUNGAHLIN HIGH SCHOOL KENNY TIAThe traffic demands associated with the proposed EGHS development were agreed with TCCS. Thesewere based on the 70th percentile trip generation rates published by RMS NSW for public secondaryschools and the traffic distribution adopted in the previous Calibre model.Under the 2023 EGHS Case – Minimal Road Upgrade scenarios the core intersections are generallyexpected to operate satisfactorily. However, the maximum queues on the east approach to theFlemington Road / Well Station Drive intersection (during the AM commuter, PM school and PMcommuter peak hours) and the west approach to the Horse Park Drive / Well Station Drive intersection(AM commuter peak hour) are expected to extend back to block upstream intersections. This causesexcessive delays to vehicles on the west approach to the Well Station Drive / Nullarbor Avenueintersection as well as on the west approach to the Horse Park Drive / Well Station Drive / BettongAvenue intersection during the AM commuter peak hour. It was found that in 2023 EGHS contributedapproximately twice the number of peak hour vehicle trips to these critical approaches, compared to theKenny development. This is primarily due to the small number of occupied dwellings within Kenny,assumed as part of the 2023 scenarios. As such, the poor performance of part of the road network isexpected irrespective of whether only EGHS or the Kenny development were to proceed in 2023.On this basis, Works Package A is required to provide access to the Park & Ride Facility, while, WorksPackage E is recommended to provide safe and efficient access to the initial stages of the Kennydevelopment and the school site (including for pedestrians). Similarly, Works Package M isrecommended to improve pedestrian safety at the Kings Canyon Street / Well Station Drive intersection.Works Packages C and D are recommended to improve the performance of the arterial road networkwithin the study area and Works Package F is recommended to address geometric constraints on WellStation Drive.Under the 2031 EGHS Case scenarios and in addition to those upgrades recommended under the 2023EGHS Case, Works Package G is required to provide access to the latter stages of the Kennydevelopment. Similarly, Works Package L is recommended to provide an additional access to theschool site. Works Package H is recommended to improve the performance of the Flemington Road /Well Station Drive intersection. Furthermore, Works Packages I and K have been adopted in themodelling to address capacity constraints identified outside the core area of the model. Further analysisinto the performance of the Hoskins Street / Well Station Drive and Federal Highway / Horse Park Drive/ Majura Parkway intersections is required. Finally, Works Package J has also been included to addressgeometric constraints that arise from the inclusion of Works Package I.RECOMMENDED ROAD UPGRADESThe following table summarises the works packages recommended in order to maintain an acceptablelevel of performance across the road network, under the various future scenarios.Recommended Works PackagesWorks PackagePrimary Reason forRecommendationA – Park & Ride Access20232031BaseEGHSBaseEGHSAccessYesYesYesYesB – Kenny Access (2023)AccessYesC – Well Station DriveDuplication: Flemington Road toKings Canyon StreetRoad NetworkPerformanceYesYesYesYesD – Bettong Avenue / Horse ParkDrive / Well Station Drive: DualRight-Turn Lanes on WestApproachRoad NetworkPerformanceYesYesYesYesE – Albatross Crescent West /Well Station Drive: TrafficSignalsAccess andPedestrian SafetyRef: 7281 EGHS Kenny TIA rev4.0.docxCOMMERCIAL IN CONFIDENCEYesYesYeswww.indesco.com.au v
7281 EAST GUNGAHLIN HIGH SCHOOL KENNY TIA20232031Works PackagePrimary Reason forRecommendationF – Well Station DriveDuplication: Kings Canyon Streetto Albatross Crescent WestGeometricConstraintsG – Kenny Accesses (2031)AccessYesYesH – Flemington Road / WellStation Drive: Dual Right-TurnLanes on South ApproachRoad NetworkPerformanceYesYesI – Hoskins Street / Well StationDrive: Traffic SignalsFurther AnalysisRequiredYesYesJ – Well Station DriveDuplication: Hoskins Street toFlemington RoadGeometricConstraintsYesYesK – Federal Highway / Horse ParkDrive / Majura Parkway: ThirdEastbound Through Traffic LaneFurther AnalysisRequiredYesYesL – School Loop Road / WellStation Drive: Left-In, Left-OutAccessAccessM – Kings Canyon Street / WellStation Drive: Traffic SignalsPedestrian SafetyBaseEGHSBaseYesEGHSYesYesYesYesPARKING ASSESSMENTSA range of parking assessments were undertaken in accordance with the relevant statutoryrequirements.In accordance with the Bicycle Parking General Code, the proposed development requires:xxx150 secure bicycle parking spaces (100 for the high school and 50 for the primary school and preschool),Seven (7) convenient bicycle parking spaces (four (4) for the high school and three (3) for theprimary school and pre-school), and10 showers and associated change rooms (six (6) for the high school and four (4) for the primaryschool and pre-school).In accordance with the Parking and Vehicular Access General Code, the proposed developmentrequires:xx144 long-term car parking spaces (80 for the high school, 60 for the primary school and four (4) forthe pre-school), and72 short-term car parking spaces (40 for the high school, 30 for the primary school and two (2) forthe pre-school).It is noted that the 221 car parking spaces shown on the preliminary school Master Plan, exceeds thestatutory car parking requirement by five (5) car parking spaces.A first principles car parking demand assessment was also undertaken, based on the conservative trafficgeneration adopted for the proposed school development. This assessment found that the proposedschool development is likely to generate peak car parking demands in the order of:xx179 long-term car parking spaces (100 for the high school, 75 for the primary school and four (4)the pre-school), and97 short-term car parking spaces (46 for the high school, 47 for the primary school and four (4) forthe pre-school).Ref: 7281 EGHS Kenny TIA rev4.0.docxCOMMERCIAL IN CONFIDENCEwww.indesco.com.au vi
7281 EAST GUNGAHLIN HIGH SCHOOL KENNY TIAIt is noted that these car parking demands exceed both the statutory car parking requirement and thenumber of car parking spaces shown on the preliminary school Master Plan. Given the impact thatrestricted car parking availability can have on mode choices, it is recommended to provide car parkingat the proposed development in-line with the statutory requirements. This will assist in creating a modeshift away from private motor vehicles.Ref: 7281 EGHS Kenny TIA rev4.0.docxCOMMERCIAL IN CONFIDENCEwww.indesco.com.au vii
Works Package MWorks Package ACOMMERCIAL IN CONFIDENCERef: 7281 EGHS Kenny TIA rev4.0.docxRecommended Works Packages – 2023 EGHS CaseProposed School SiteWorks Package CProposed Park &Ride FacilityReasoning:AccessGeometric ConstraintsPedestrian SafetyRoad Network PerformanceFurther Analysis Required7281 EAST GUNGAHLIN HIGH SCHOOL KENNY TIAWorks Package EWorks Package DProposed KennyDevelopmentwww.indesco.com.au
COMMERCIAL IN CONFIDENCERef: 7281 EGHS Kenny TIA rev4.0.docxRecommended Works Packages – 2031 EGHS CaseProposed School SiteWorks Package CProposed Park &Ride FacilityWorks Package GWorks Package DWorks Package EWorks Package LWorks Package MWorks Package AWorks Package HWorks Package IWorks Package JReasoning:AccessGeometric ConstraintsPedestrian SafetyRoad Network PerformanceFurther Analysis Required7281 EAST GUNGAHLIN HIGH SCHOOL KENNY TIAProposed KennyDevelopmentwww.indesco.com.au iWorks Package K
7281 EAST GUNGAHLIN HIGH SCHOOL KENNY TIATABLE OF CONTENTS1.2.INTRODUCTION .1PROPOSED DEVELOPMENT .12.1Overview / Yields . 12.2Internal School Layout . 12.3Internal Vehicle Access .
Ref: 7281_EGHS Kenny TIA rev4.0.docx COMMERCIAL IN CONFIDENCE www.indesco.com.au i 7281 EAST GUNGAHLIN HIGH SCHOOL KENNY TIA PROJECT TITLE: East Gungahlin High School Kenny TIA PROJECT NUMBER: 7281 Prepared by: B Hodges / H McDonal
