TRAFFIC ASSESSMENT PROPOSED RESIDENTIAL DEVELOPMENT 42 - 66 JUNCTION ROAD SCHOFIELDS Ref: 15-149 MAY 2016 COPYRIGHT: The concepts and information contained within this document are the property of Thompson Stanbury Associates. Use or copying of this document in whole or in part without the written permission of Thompson Stanbury Associates constitutes an infringement of copyright.
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TRAFFIC ASSESSMENT PROPOSED RESIDENTIAL DEVELOPMENT 42 … · 42 – 66 Junction Road, Schofields. The abovementioned proposal is to be serviced by a series of new access roads (two
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TRAFFIC ASSESSMENT PROPOSED RESIDENTIAL DEVELOPMENT
42 - 66 JUNCTION ROAD SCHOFIELDS
Ref: 15-149
MAY 2016
COPYRIGHT: The concepts and information contained within this document are the property of Thompson Stanbury Associates. Use or copying of this document in whole or in part without the written
permission of Thompson Stanbury Associates constitutes an infringement of copyright.
1. INTRODUCTION The Practice of Thompson Stanbury Associates has been commissioned by Jencaring
JW Development Pty Ltd.to prepare a Traffic & Transport Impact Assessment
accompanying a Development Application (DA) lodged with Blacktown City
Council. The subject DA proposes the demolition of existing site structures and the
construction of a residential flat building development containing eight apartment
buildings (A - H) comprising 703 apartments within three parcels of land, located at
42 – 66 Junction Road, Schofields.
The abovementioned proposal is to be serviced by a series of new access roads (two
east-west local roads and two north-south local roads), which are generally consistent
with the Indicative Layout Plan (ILP) for the Riverstone Precinct prepared by the
Department of Planning & Infrastructure. It is acknowledged, however that the
proposed north-south road running through the centre of the site is an additional road
that represents a variation to the Riverstone Precinct ILP. This local access road will
effectively create two new intersections with the two abovementioned east-west local
roads at its northern and southern extremities.
The external traffic impacts of the subject proposal and indeed, the entire Riverstone
Precinct have been assessed by others as part of the Precinct Planning process on
behalf of the North West Growth Centre. The purpose of this report is therefore to
primarily assess the internal and immediately adjoining development traffic and
parking considerations. Specifically, this report:
Describes the planned road network in the immediate vicinity of the subject
development;
Assesses the suitability of the proposed direct vehicular access arrangements
based on standards specified by the Australian Standards;
Assesses the adequacy, or otherwise, of the proposed off-street parking
provision having regard to the rates specified by Blacktown City Council
Growth Centre Precincts DCP; and
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Assesses the proposed parking, internal circulation and servicing layout with
respect to internal circulation and vehicle manoeuvrability.
Throughout this report, reference is made to the following documents:
Australian Standard for Parking Facilities Part 1: Off-Street Parking (AS
2890.1-2004) Parking Facilities Part 2: Off-Street Commercial Vehicles
Facilities (AS2890.1-2002), Parking Facilities Part 3: Bicycle Parking
(AS2890.3-2015) and Parking Facilities Part 6: Off-Street Parking for People
with Disabilities (AS2890.6-2009);
Blacktown City Council’s Growth Centre Precincts Development Control
Plan 2014 and Schedule Two (Riverstone Precinct);
Road Delay Solution’s North West Growth Centre Indicative Layout Plan
Revision Traffic and Transport Model Year 2036; and
AECOM’s Schofields Precinct – Transport and Access Strategy.
Architectural plans have been prepared by Krikis Tayler Architects, which should be
read in conjunction with this report.
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2. SURROUNDING ROAD NETWORK 2.1 Precinct Planning The long-term strategic vision for future development within Metropolitan Sydney is
guided by the Sydney Metropolitan Strategy document The Metropolitan Plan for
Sydney 2036, released by the NSW Government in 2010. This document highlights
the planning challenges anticipated to be faced by the metropolitan area in the future,
with respect to residential growth and its subsequent impact on the economy,
employment, housing, transport, environment, resources and other public amenities.
The Riverstone Precinct formed the first stage in the North West Growth Centre
released for planning purposes. The precinct planning process examined the future use
of the land through specialist studies such as biodiversity, transport and access,
flooding and drainage, heritage, noise and odour, land capability, visual landscape,
bushfire and employment / retail opportunities. These technical studies assisted in the
determination of the location of various land uses such as residential, employment,
educational, recreational parks and others.
The above technical studies resulted in the formulation of the Riverstone Precinct
Indicative Layout Plan (ILP), which identifies the zoning of parcels of land within this
Precinct. Figure 1 overleaf illustrates the Riverstone Precinct ILP and the parcel of
land subject to this assessment.
The above planning process resulted in the preparation of Schedule 2 (Riverstone
Precinct) of the Blacktown City Council Growth Centre Development Control Plan
2014 by the Department of Planning & Infrastructure. This Development Control Plan
communicates the planning, design and environmental objectives and controls against
which Blacktown City Council will use to assess Development Applications.
One of the above technical studies which partially assisted with the precinct planning
was AECOM’s Schofields Precinct – Traffic and Access Strategy. This report
forecasted and analysed the future traffic impacts associated with the precinct
development and recommended appropriate infrastructure upgrades and other
measures to maximise the efficiency and safety of the future transportation system
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and surrounding road network within the suburb of Schofields, which forms part of
the overall Riverstone Precinct ILP.
FIGURE 1
SUBJECT SITE LOCATION WITHIN THE CONTEXT OF THE RIVERSTONE PRECINCT INDICATIVE LAYOUT PLAN
Source: Schedule Two (Riverstone Precinct) - Blacktown City Council Growth Centre Development Control Plan 2014
SUBJECT SITE
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The infrastructure and transport upgrades recommended in the vicinity of the subject
site within the Schofields Precinct – Traffic and Access Strategy report are as follows:
Upgrade of Schofields Road to provide a four lane arterial road capable of
accommodating two lanes of traffic in each direction to accommodate
increases in regional and local traffic as well as serve as a transit corridor;
Signalisation of the following intersections on Schofields Road:
- Junction Road as a T-junction;
- Railway Terrace (realigned) as a cross-junction; and
- Boundary Road (realigned) with Alex Avenue as a cross-junction.
Grade separation of the Blacktown/Windsor Railway Line with Schofields
Road with connection to South Street and to Richmond Road as part of the
Marsden Park precinct.
2.2 42 - 66 Junction Road, Schofields (Subject Site) 2.2.1 Site Location The subject site is situated on the western side of Junction Road, approximately 120m
north of its intersection with Schofields Road, Schofields. It is proposed to be
serviced by four new local access roads, with two roads adjoining the southern and
western property alignments, whilst the other two roads transverse across the centre of
the site, effectively subdividing the land into three separate allotments. This location
is illustrated within the Riverstone Precinct ILP, previously shown in Figure 1.
2.2.2 Site Description The subject site has an inclusive property address of 42 - 66 Junction Road,
Schofields, with a real property description of Lots 25 - 26 DP 13137 and Lot 22 DP
850117. The consolidated allotments effectively form a regular development site that
currently provides a single frontage to Junction Road of approximately 207m and a
depth extending west away from Junction Road of approximately 204m. The total
area of the site is 4.12ha.
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2.2.3 Existing Uses The subject site currently accommodates two detached residential dwellings and
associated outbuildings, being serviced by separate access driveways connecting with
Junction Road at the eastern property alignment.
2.2.4 Surrounding Uses The surrounding lands comprise a mixture of rural residential development and
undeveloped allotments located within large parcels of land similar to the subject site.
These rural allotments are to be transformed into a higher density urban precinct
planned for the Riverstone precinct, as part of the North West Growth Centre
development strategy.
The projected traffic generation associated with the proposed site improvements and
its potential impacts to the surrounding road network at full development in 2036 has
been incorporated within the future traffic impact assessment of the entire North West
Growth Centre, prepared by Road Delay Solutions within their publication of the
North West Growth Centre Indicative Layout Plan Revision Traffic and Transport
Model Year 2036.
2.3 Surrounding Road Network 2.3.1 Road Hierarchy 2.3.1.1 Existing Surrounding Road Network The following provides a description of the existing local road hierarchy in the
immediate vicinity of the subject site:
Junction Road
Junction Road currently performs a local Collector Road function under the care and
control of Blacktown City Council. In this regard, it has a north/south alignment,
providing connectivity between St Albans Road at its northern extremity and
Schofields Road at its southern extremity, forming T-junctions with both under
major/minor priority control with Junction Road forming the minor route.
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Junction Road provides a rural carriageway width of 8m, providing one through lane
of traffic in each direction between unsealed shoulders. Traffic flow within Junction
Road is governed by a pavement marked speed limit of 50km/h between Advance
Street and St Albans Road, with school zone restrictions of 40km/h being enforced
between 8.00am - 9.30am and between 2.30pm - 4.00pm in the vicinity of Schofields
Public School. Traffic flow within Junction Road between Advance Street and
Schofields Road and in the immediate of the subject site is governed by a speed limit
of 60km/h.
Schofields Road
Schofields Road currently provides a State Road function under the care and control
of Roads & Maritime Services. In this regard, it provides an east-west arterial
connection between Windsor Road, Rouse Hill in the east and Railway Terrace,
Schofields in the west, effectively linking the two adjoining residential suburbs within
Sydney’s north-western region. It had been up to the start of widening works, been
provided with a 9m wide pavement, providing one through lane of traffic in each
direction between unsealed road shoulders however with roadworks in progress
detours etc are in force to accommodate the road widening works . Traffic flow
within Schofields Road is governed by a sign posted speed limit of 60km/h generally
with specific road work speed zones to accommodate road detours etc.
2.3.1.2 Planned Road Network
The surrounding road hierarchy, layout and control measures are planned to be
generally adopted within the Riverstone Precinct, established within Schedule Two
(Riverstone Precinct) - Blacktown City Council’s Growth Centre Development
Control Plan 2014 (DCP 2014). Figure 2 overleaf illustrates the road network
defined within the Development Control Plan, whilst the following provides a
summary of the road network in the immediate vicinity of the subject site:
Junction Road
Junction Road is to continue performing a local collector function servicing
intersecting side roads and abutting developments. In this regard, it is planned to be
widened to provide an 11m wide pavement within a 20m wide road reserve. One
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through lane of traffic is to be provided in either direction in conjunction with parallel
parking along both kerb alignments. A 1.5m wide pedestrian footpath is proposed to
adjoin the subject development along the eastern property alignment. At its southern
extremity, Junction Road’s intersection with Schofields Road is to be upgraded to be
operated under traffic signal control with auxiliary turning lanes.
Source: Schedule Two (Riverstone Precinct) - Blacktown City Council Growth Centre Development Control Plan 2014
Schofields Road
The State Road functionality/hierarchy of Schofields Road within the surrounding
road network is to remain unchanged under DCP 2014. In this regard, Schofields
Road is currently being upgraded to provide a dual carriageway, providing two
through lanes of traffic in each direction, separated by a 15m wide central median.
SUBJECT SITE
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Local Roads 1 and 2
Two new east-west local roads (referred to as ‘Road 1’ and ‘Road 2’) are proposed to
be constructed in accordance with Riverstone Precinct ILP. These roads are designed
to perform a local access function, providing a connection between Junction Road in
the east and a planned new north/south aligned local road (referred to as ‘Road 3’) in
the west. Further, these two east-west local roads are to facilitate a northerly and
southerly access to another north/south local road (referred to as ‘Road 4’), proposed
as part of the subject development that runs through the centre of the site, which
signifies an alteration to the Riverstone Precinct ILP.
Roads 1 and 2 are proposed to provide an 11m wide undivided carriageway within a
18m wide road reserve which exceeds the minimum dimensions specified within DCP
2014. One through lane of traffic is proposed to be provided in either direction in
conjunction with formalised kerb and guttering along both sides of both roads. It
should be acknowledged that for this DA that only half road construction is proposed
for Road 2. The other half is to be constructed by other developers, when adjoining
lots to the south are to be redeveloped.
Road 3
Under DCP 2014, Road 3 is to have a north/south alignment that is to provide a
frontage to the site at the western property boundary. Road 3 is designated to provide
a connection between Advance Street in the north and an east/west road assigned with
a local access street function, under the Riverstone Precinct ILP, in the south. In the
immediate vicinity of the subject site, Road 3 is to intersection with Roads 1 and 2 at
the north-western and south-western corners of the site.
Road 3 is proposed to form an overall road reservation width of 18m, comprising a
pavement width of 11.0 m and verges of 3.5m abutting both sides of the road
respectively. One through lane of traffic is to be provided along both kerb alignments.
Similar to Road 2, only half road construction is proposed for Road 3 under this DA
The other half will be constructed by other when the adjoining lots to the west are re-
developed.
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Road 4
It has been previously acknowledged that another north-south aligned road (Road 4) is
to be constructed as part of the subject proposal, which represents a deviation from
the road configuration specified within DCP 2014. Road 4 is proposed to be
constructed to the same dimensions as the abovementioned roads (18m wide road
reservation comprising a 9m wide pavement between 3.5m wide verges). It is to
accommodate two lane two-way traffic flow in conjunction with parallel parking
along both kerb alignments.
Based on the location of this local road within the context of the site and the
surrounding road network, it is to perform a minor residential access function
primarily associated with servicing vehicular movements generated by three out of the
eight residential apartment buildings (denoted as Buildings C, D and E within Krikis
Tayler’s architectural plans) proposed within the subdivided lot occupying the south-
eastern portion of the subject site.
The combined development yield of apartment buildings C, D and E is 287 dwellings
comprising 59 one-bedroom dwellings, 196 two-bedroom dwellings and 32 three-
bedroom dwellings. According to RMS’ Guide to Traffic Generating Developments,
medium density residential flat buildings are estimated to produce the following peak
hour trips:
Smaller units and flats (up to two bedrooms):
Weekday peak hour vehicle trips = 0.4-0.5 per dwelling.
Larger units and town houses (three or more bedrooms):
Weekday peak hour vehicle trips = 0.5-0.65 per dwelling.
Application of the higher rates to the development yield, it is estimated that up to 149
trips can be generated during peak periods within the local road. Such a level of traffic
activity is well below the capacity of the local road. As such, motorists are expected
to experience a good level of service and minimal delays within this local road
without any significant impacts to the residential/environmental amenity within the
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surrounding precinct (as 149 trips is well below the desirable environmental threshold
of 200 trips per hour specified within the Guide to Traffic Generating Developments).
2.2.2 Traffic Volumes and Conditions Table 1 overleaf summarizes the projected 2036 peak hour traffic volumes within
Junction Road immediately adjoining the subject site to the east, incorporating full
redevelopment of the Riverstone Precinct, as detailed within the North West Growth
Centre Indicative Layout Plan Revision Traffic and Transport Model Year 2036.
Source: Road Delay Solutions’ North West Growth Centre Indicative Layout Plan Revision Traffic and Transport Model Year 2036. Table 1 indicates that Junction Road is forecasted to accommodate two directional
traffic demands of between 1,500 – 2,000 vehicles per hour during peak periods, with
directional demands being tidal whereby northbound movements dominating during
the morning peak and southbound movements dominate during the evening peak. This
directional volume split is associated with commutter journeys to and from work.
2.2.3 Traffic Control The Riverstone & Alex Avenue Precincts Section 94 Contributions Plan provides for
signalised intersection control at the junctions of Schofields & Boundary Road and
Schofields Road & Junction Road. The signalisation planned for these intersections
would punctuate the traffic stream within Schofields Road, resulting in regular and
extended gaps in the traffic flow to allow turning movements to occur to and from
Junction Road in a safe and efficient manner.
2.4 Public Transport The site will be serviced by existing bus services operating along Schofields Road
which are within easy walking distance of the site. In addition, Schofields Railway
TABLE 1 PROJECTED 2036 PEAK HOUR TRAFFIC DEMANDS OF
JUNCTION ROAD Junction Road
(North of Schofields Road)
AM PEAK PM PEAK
Northbound 459 1478 Southbound 991 457
Total 1,450 1,935
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Station is located to the south-west of the site, which is able to be accessed via those
bus services that operate along Schofields Road. Further, additional commuter
parking facilities are scheduled to be provided adjoining the railway station to provide
reasonable accessibility for residents of the subject development and these public
transport facilities, with the pedestrian facilities within the proposed traffic signals
servicing their requirements in crossing Schofields Road, as well as footways within
Junction Road.
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3. PROPOSED DEVELOPMENT 3.1 Built Form The subject proposal involves the demolition of existing site structures and the
construction of a medium density residential development comprising seven
apartment buildings (A – H) with the following dwelling mix as illustrated in Table 2.
The abovementioned development is proposed to be serviced by two new east-west
local roads (Road 1 and 2), two new north-south local roads (Road 3 and 4) and
Junction Road, which effectively subdivides the site into three separate allotments.
Buildings A and B are proposed to occupy the lot situated within the northern portion
of the site, whilst buildings C, D and E and buildings F, G and H are to occupy the
two remaining lots, located within the south-eastern and south-western portions of the
site respectively.
Buildings A & B are to be provided with two levels of basement car parking
containing 161 car spaces. Buildings C, D and E are to be serviced by two levels of
basement car parking containing 361 spaces. Buildings F, G and H are proposed to be
provided with an at-grade and a basement level parking area containing a total of 361
spaces.
Vehicular access into the off-street parking area associated with buildings A and B is
to be facilitated by 6m wide combined ingress/egress access driveway connecting
with Junction road at the eastern property alignment.
TABLE 2 DEVELOPMENT DATA OF PROPOSED MEDIUM DENSITY
RESIDENTIAL DEVELOPMENT
Building Dwelling Composition
One Bedroom Two Bedrooms Three Bedrooms Total A & B 34 86 10 130
C, D & E 59 196 32 287 F, G & H 57 197 32 286
Total Units 703
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Vehicle access into the off-street parking areas servicing buildings C, D and E from
Road 4 is proposed to be facilitated by an 11m wide combined ingress/egress access
driveway, located at the south-western corner of the lot in which these apartments
(C,D and E) are proposed to occupy. Similarly, vehicular connectivity between the
basement level car parks servicing buildings F, G and H and Road 3 is proposed to be
accommodated by an 11m wide combined ingress/egress access driveway, located at
the south-western corner of the property.
In addition to the above, it is acknowledged that loading bays are proposed to be
provided within the abovementioned internal parking areas to ensure that all site
servicing activities (e.g. refuse collection, delivery of goods, etc.) are to occur off-
street. It is further understood based on information provided by the applicant that the
largest vehicle to service the site is Council’s 11m long refuse collection vehicles.
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4. ACCESS & INTERNAL CONSIDERATIONS 4.1 Vehicular Access Vehicular access from adjoining public roads to the subject dwellings is proposed to
be provided in the following arrangements:
Buildings A and B are proposed to be serviced by a 6m wide combined
ingress/egress driveway, providing connectivity between the basement parking
areas containing 161 spaces and Junction Road at the eastern property boundary;
Buildings C, D and E are proposed to be serviced by an 11m wide combined
access driveway comprising of a 6m wide entry lane and a 4m wide exit lane
separated by a 1m wide painted median. This access driveway is to service the
internal parking areas containing 361 spaces servicing residents and visitors of
buildings C, D and E from Road 4 at the south-western corner of the easternmost
lot, where the apartments are to be located; and
Buildings F, G and H are also proposed to be serviced by an 11m wide combined
access driveway comprising of a 6m wide entry lane and a 4m wide exit lane
separated by a 1m wide painted median. This access driveway is to provide
connectivity between the off-street parking areas 361 spaces servicing buildings F,
G and H and Road 3 at the south-western corner of the property.
In order to undertake an assessment of the driveway design servicing each component
of the abovementioned development, reference is made to AS2890.1-2004. This
Standard provides appropriate driveway width specifications based on the primary
land use proposed, the number of parking spaces accommodated and the functional
order of the access road. With regard to AS2890.1-2004 specifications, the following
provides a summary of the minimum requirements with respect to each access
arrangement raised above:
Buildings A & B - Based on the on-site parking provision of 161 car spaces, the
residential nature of the land use and the local (non-arterial) functional order of
the frontage road (Junction Road), AS2890.1-2004 specifies at minimum, a
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Category 2 type access driveway, comprising a combined ingress / egress width
of between 6m - 9m. The proposed 6.0m wide combined ingress / egress
driveway servicing buildings A and B readily accords with the minimum
AS2890.1-2004 requirement and is therefore considered to be satisfactory;
Buildings C, D & E and Buildings F, G & H - Based on the internal parking
provision of 361 car spaces, the residential nature of the land use and the local
(non-arterial) functional order of the new frontage roads (Roads 3 and 4),
AS2890.1-2004 specifies at minimum, a Category 3 type access driveway is
required, as a minimum, comprising an entry width of 6m, an egress width of
between 4-6m, with a separation of between 1-3m. The proposed access driveway
servicing the proposed development therefore suitably complies with the
abovementioned AS2890.1-2004 requirement and accordingly, is considered to
be satisfactory with respect to accommodating passenger vehicles.
Notwithstanding the above, it is further acknowledged that the proposed access
driveways are also expected to accommodate heavy vehicles up to the size of 11m
long refuse collection trucks, with a 25m turning radius.
In order to demonstrate that the abovementioned proposed access arrangements are
suitable in accommodating such vehicles, a swept path assessment has been
performed on the architectural design, utilising turning path templates of 12.5m long
Heavy Rigid Vehicles (HRV) provided within AS2890.2-2002 (a copy of which is
provided in Appendix 1). It is noted that the Australian Standards and Austroads does
not provide turning path templates specific for Council’s 11m long garbage collection
trucks. As such, an HRV turning template was used to simulate the turning
movements of Council’s garbage collection trucks, as it provides a turning radius
similar to such vehicles.
These swept paths indicate that vehicles up to the size of 12.5m long HRVs are
capable of accessing and vacating the subject site in a safe and efficient manner,
without any unreasonable encroachment on the adjoining public and private
infrastructure. As such, the access driveway design is readily capable of
accommodating the largest vehicle (11m long refuse collection vehicle) proposed to
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frequent the site. In this regard, the proposed access driveway arrangements are
therefore considered to be satisfactory.
4.2 Parking Provision 4.2 Parking Provision The subject development is proposed to provide a consolidated parking provision