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220527 Sight Distance Assessment and IR Responses
Attached to the e-mail Response to Information Request OPW22/0117 - 38 Tristania Dr Marcus Beach.
Mr Daniel Epps Noosa Council PO Box 141 Tewantin QLD 4565 Via email: - [email protected] 30 May 2022 Dear Daniel, RE: Sight Distance Assessment for a relocated driveway – 38 Tristania Dr, Marcus Beach (OPW22/0117) 360 Civil Consulting has been engaged to respond to the Noosa Council Information Request dated 6th May 2022 in relation to the application for a relocated driveway at 38 Tristania Dr, Marcus Beach. Noosa Council’s Information Request states:- Issue Given the natural topography of Melaleuca Street, council have concerns regarding the potential impacts the proposed driveway crossover will have on the safety of the existing road conditions for all road users. Information Required 1. Provide additional detail demonstrating that the proposed location of the driveway is safe by: a. providing a safe sight distance analysis; and b. how it complies with the relevant standards. Response to Information Request Item 1: - 38 Tristania Dr is a corner lot situated on the intersection of Melaleuca St and Tristania Dr as shown in the below in Figure 1.
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Figure 1 – Aerial view of 38 Tristania Dr, Marcus Beach (Courtesy of Noosa Council Interactive Mapping) The existing crossover to the lot is located on Tristania Dr. The proposed relocated vehicle crossover is to be located on the southern boundary as shown below in Figure 2 and Figure 3. Figure 2 – Aerial view of location of vehicle crossover
Page 3
Figure 3 – Proposed location of the vehicle crossover Sight Distance Assessment against AS2890.1 An assessment of the proposed crossover location against the requirements of AS2890.1 for Domestic Driveways has been undertaken. Melaleuca St and Tristania St do not have a posted speed limit and as such are restricted to 50km/hr. In line with Section 2.3 of Queensland Streets and the radii of the horizontal curves approaching the vehicle crossover, the likely design speed for vehicles approaching from the east of the driveway is 25km/hr. In accordance with Figure 2.3.B of Queensland Streets, the roundabout to the west is considered to be a “end condition” which is designated to have a design speed of 20km/hr. Section 3.2.4 of AS2890.1 details the minimum required sight distance for domestic properties for roads with varying frontage road speeds. Figure 3.2 in AS2890.1 does not contain any recommended sight distances for roads with a frontage road speed of less than 40km/h. Therefore, this assessment has been completed using a frontage road speed of 40km/hr even though the actual design speed has been demonstrated to be less than 40km/hr. To determine the available sight distance the driver’s eye has been assumed to be 1.1m high and the height of an oncoming vehicle has been assumed to be 1.25 m. These heights are in line with Austroads guidelines for sight distance measurements. The available sight distances from the approximate location of the driver’s eye on the proposed crossover to Melaleuca St are shown in Figures 4 and 5.
Page 4
Figure 4 – Available sight distance to the west from the proposed vehicle crossover
Figure 5 – Available sight distance to the east from the proposed vehicle crossover
Table 1 below details the: -
• relevant design speed
• minimum domestic driveway sight distance (from Figure 3.2 AS2890.1); and
• current available sight distance (measured on site).
Table 1 – AS2890.1 required sight distance and available sight distance for the proposed
vehicle crossover
Sight distance Design speed / speed limit Min sight distance for Available sight
direction (km/hr) Min domestic properties (m) distance (m)
North East 40 30 33
South East 40 30 30
West 40 30 70
Figure 6 overleaf further explains the “Sight Distance Direction” that is referred to in Table
1.
Page 5
North East Direction
West Direction
South East Direction
= Proposed Crossover
Location to Melaleuca St
Figure 6 – Sight Distance Direction as referenced in Table 1
As detailed in Table 1, the available sight distance for the proposed crossover location to
Melaleuca St complies with AS2890.1 for all vehicles approaching the proposed driveway
location.
Driveway Assessment Against IPWEA Drawing RS-049 and RS-050
360 Civil Consulting Drawing No. 2022033 Dwg No. 03 of 05 (Issue A) provides a plan
detailing the proposed location of the new driveway. The distance from the tangent point
to the edge of the crossover has been measured to be 6.7m. As such, the proposed
crossover is not located within the prohibited zone on IPWEA Drawing RS-049.
The proposed driveway long section which is contained in Appendix A is also compliant with
the requirements in AS2890.1 and RS-050. The driveway long section shows that the first
grade from invert of kerb has been reduced from the standard 12.5% to 8% due to the
existing road cross fall being greater than the standard 3%.
Summary
The proposed Melaleuca St crossover and driveway to service the new dwelling on 38
Tristania Dr, Marcus Beach has been assessed against the sight distance requirements
contained in AS2890.1, IPWEA Standard Drawing RS-049 and RS-050.
In determining the compliance against AS2890.1, the design speeds of approaching vehicles
were determined to be in the order of 20km/hr from the west and 25 km/hr from the east.
The driveway was assessed against a design speed of 40km/hr and as such will provide a
conservative result. Based on an assessment of a design speed of 40km/hr, the proposed
Page 6
driveway location has adequate sight distances in all directions to comply with the
requirements of AS2890.1.
The proposed crossover was also assessed against RS-049 and RS-050. The crossover was
found to be located clear of the prohibited zone and designed with a long section that is
compliant with RS-050.
As such, the proposed crossover has been deemed to have adequate sight distances and
able to be constructed to meet all relevant standards.
Issue
The submitted documentation indicates that the applicant proposes to construct a driveway
crossover within the road reserve, in which a minor cut will be required. Council have
concerns regarding the impact the cut will have on the natural surface and the potential
creation of trip hazards within the road reserve.
Information Required
2. Provide an amended plan that demonstrates how trip hazards will be eliminated
within the road reserve due to the construction of the proposed driveway crossover.
Please note that council is unlikely to support private retaining structures within the
road reserve. The amended plan must be prepared by a suitably qualified person
(RPEQ – Registered Professional Engineer of Queensland) and include, but not be
limited to:
a. the full extent of the transition to the adjoining areas of verge
Response to Information Request Item 2: -
Please refer to the amended 360 Civil Consulting Drawing No. 2022033 Dwg No.’s 03 of 05
(Issue A) which now include additional details regarding the required transition from the
edge of driveway to the adjacent existing verge surface levels.
Issue
The submitted documentation does not include a Stormwater Management Plan. Details are
provided indicating that roof water will be discharged into existing kerb and channel
adapters, however, no details are provided for how other impervious and landscaped areas
will be collected and released.
Information Required
3. Provide a Stormwater Management Plan that includes, but not limited to, details of
how rain water on landscaped and impervious areas will be collected and released
from the site.
Response to Information Request Item 3: -
Please refer to the amended 360 Civil Consulting Drawing No. 2022033 Dwg No.’s 03 of 05
(Issue A) which now include additional Stormwater Management Notes regarding the
discharge of stormwater from the site to the road reserve.
End of Information Request Responses.
Page 7
If you have any queries in relation to the above responses to Council’s Information Request, please do not hesitate to contact Beatrice Gibberd on 0403 862 009. Yours sincerely, Beatrice Gibberd Principal Engineer (RPEQ No. 14557 ) 360 Civil Consulting Pty Ltd Attachments:- 360 Civil Consulting Pty Ltd Drawings 01 - 05 (Issue A)
Page 8
Proposed Driveway
Engineering Plans for MCU/OPW Application
at
38 Tristania Dr, Marcus Beach
For
Marcus Carroll
SITE OF WORKS
RP Description
Lot 73 M11111
38 Tristania Dr, Marcus Beach
Site Area = 612m²
Datum AHD Scale As Shown Status FOR APPROVAL
ABN: 13 609 593 339 Project Proposed Driveway Drawing Title Index & Locality Plan
Date April 2022 Drawn JAG Checked BG PO Box 5028
NORTH
Maroochydore BC
© 360 Civil Consulting Pty Ltd - All Rights Reserved.
This drawing as been produced for the sole benefit of the Designed JAG Approved BG Location 38 Tristania Dr, Marcus Beach
Client in accordance with the Terms of Agreement. QLD 4558
No responsibility or liability will be assumed to any third BEATRICE GIBBERD RPEQ 14557 Mobile: 0403 862 009
party. This document shall only be used for the site and
project specified.
A 30-05-22 Amendments as per Council IR
Issue Date Description
JAG BG
By Chkd
Email: [email protected] Client Marcus Carroll Project No. 2022033 Dwg No. 01 of 05 Issue A
Page 9
EXISTING AC 100Ø WATER MAIN
EXISTING TELSTRA
EXISTING 150Ø VC SEWER MAIN
LEGEND
D D
W
TRISTANIA DR
EXISTING TELSTRA
MELALEUCA ST
0 2 4 6 8 10m
SCALE 1:200 A3
Datum AHD Scale As Shown Status FOR APPROVAL
ABN: 13 609 593 339 Project Proposed Driveway Drawing Title Existing Features Plan
Date April 2022 Drawn JAG Checked BG PO Box 5028
NORTH
Maroochydore BC
© 360 Civil Consulting Pty Ltd - All Rights Reserved.
This drawing as been produced for the sole benefit of the Designed JAG Approved BG Location 38 Tristania Dr, Marcus Beach
Client in accordance with the Terms of Agreement. QLD 4558
No responsibility or liability will be assumed to any third BEATRICE GIBBERD RPEQ 14557 Mobile: 0403 862 009
party. This document shall only be used for the site and
project specified.
A 30-05-22 Amendments as per Council IR
Issue Date Description
JAG BG
By Chkd
Email: [email protected] Client Marcus Carroll Project No. 2022033 Dwg No. 02 of 05 Issue A
Page 10
Garag
LEGEND
EXISTING AC 100Ø WATER MAIN
EXISTING TELSTRA
EXISTING 150Ø VC SEWER MAIN
GARAGE D D
FFL RL13.06
W
12.395
12.385
SAG 10.895
SAG 10.885
10 10
CREST 7.029
TRISTANIA DR
5 5
CREST 3.500
Garage
0.000
12.395
12.385
0.000
SAG 10.895
SAG 10.885
0.50m 3.00m
10 10 0.50m
CREST 7.029
5 5
EXISTING TELSTRA
CREST 3.500
0.000
0.000
MELALEUCA ST
0 1.0 2.0 3.0 4.0 5.0m
SCALE 1:100 A3
Datum AHD Scale As Shown Status FOR APPROVAL
ABN: 13 609 593 339 Project Proposed Driveway Drawing Title Driveway & Stormwater Layout Plan
Date April 2022 Drawn JAG Checked BG PO Box 5028
NORTH
Maroochydore BC
© 360 Civil Consulting Pty Ltd - All Rights Reserved.
This drawing as been produced for the sole benefit of the Designed JAG Approved BG Location 38 Tristania Dr, Marcus Beach
Client in accordance with the Terms of Agreement. QLD 4558
No responsibility or liability will be assumed to any third BEATRICE GIBBERD RPEQ 14557 Mobile: 0403 862 009
party. This document shall only be used for the site and
project specified.
A 30-05-22 Amendments as per Council IR
Issue Date Description
JAG BG
By Chkd
Email: [email protected] Client Marcus Carroll Project No. 2022033 Dwg No. 03 of 05 Issue A
Page 11
PROPERTY BDY
VIP RL 13.598
VIP RL 13.573
VIP RL 13.535
VIP RL 13.523
VIP RL 12.995
HORIZONTAL CURVE DATA
VERTICAL CURVE LENGTH (m)
VERTICAL CURVE RADIUS (m)
VERTICAL GEOMETRY GRADE (%) 8% 2.5% 5% -5% -9% 1%
VERTICAL GEOMETRY LENGTH (m) 1.5 1.5 0.5 1.5 5.89 1.5
DATUM RL = 7.700
13.415
13.535
13.573
13.598
13.523
13.075
12.995
13.010
FINISHED SURFACE LEVEL
13.415
13.538
13.507
13.495
13.458
12.219
12.214
12.209
EXISTING SURFACE LEVEL
-0.003
CUT / FILL DEPTH
0.000
0.065
0.103
0.065
0.856
0.781
0.801
10.895
12.395
CONTROL LINE CHAINAGE 1.5
3.5
10
0
3
5
LONGITUDINAL SECTION LHS
PROPERTY BDY
VIP RL 13.275
VIP RL 13.162
VIP RL 13.25
VIP RL 12.995
VIP RL 13.2
HORIZONTAL CURVE DATA
VERTICAL CURVE LENGTH (m)
VERTICAL CURVE RADIUS (m)
VERTICAL GEOMETRY GRADE (%) 8% 2.5% 5% -1% -6.6% 1%
VERTICAL GEOMETRY LENGTH (m) 1.5 1.5 1.5 2.53 3.86 1.5
DATUM RL = 7.600
13.042
13.162
13.200
13.275
13.270
13.250
13.053
12.995
13.010
FINISHED SURFACE LEVEL
13.042
13.185
13.183
13.177
13.168
13.114
12.198
12.196
12.193
EXISTING SURFACE LEVEL
-0.000
-0.022
CUT / FILL DEPTH
0.017
0.098
0.101
0.136
0.856
0.799
0.817
10.885
12.385
CONTROL LINE CHAINAGE
7.029
1.5
4.5
10
0
3
5
LONGITUDINAL SECTION RHS
0 2 4 6 8 10m
SCALE 1:200 A3
Datum AHD Scale As Shown Status FOR APPROVAL
ABN: 13 609 593 339 Project Proposed Driveway Drawing Title Driveway Longitudinal Sections
Date April 2022 Drawn JAG Checked BG PO Box 5028
NORTH
Maroochydore BC
© 360 Civil Consulting Pty Ltd - All Rights Reserved.
This drawing as been produced for the sole benefit of the Designed JAG Approved BG Location 38 Tristania Dr, Marcus Beach
Client in accordance with the Terms of Agreement. QLD 4558
No responsibility or liability will be assumed to any third BEATRICE GIBBERD RPEQ 14557 Mobile: 0403 862 009
party. This document shall only be used for the site and
project specified.
A 30-05-22 Amendments as per Council IR
Issue Date Description
JAG BG
By Chkd
Email: [email protected] Client Marcus Carroll Project No. 2022033 Dwg No. 04 of 05 Issue A
Page 12
Centreline Data
X = 1990.659
Centreline Data Y = 4617.930
X = 1990.468 10.76%
1 in -6 Z = 13.119 1% 1.49%
Y = 4612.934
Z = 13.250 DATUM RL 12.500
DATUM RL 12.000
13.188
13.164
13.119
DESIGN
13.581
13.642
13.572
13.250
12.990
DESIGN
13.686
13.389
13.095
SURVEY
13.581
13.545
13.483
13.180
12.990
SURVEY
-5.391
-2.991
0.000
OFFSET
-4.010
-3.643
-2.996
0.000
1.557
OFFSET
CHAINAGE 9
CHAINAGE 4
Centreline Data
Centreline Data X = 1990.621
1% 2.27%
X = 1990.430 12.45% Y = 4616.931
Y = 4611.935 Z = 13.185
Z = 13.200
DATUM RL 12.000
DATUM RL 12.000
13.278
13.254
13.185
DESIGN
13.531
13.573
13.200
13.136
DESIGN
13.675
13.389
13.084
SURVEY
13.531
13.507
13.183
13.136
SURVEY
-5.392
-2.992
0.000
OFFSET
-3.247
-2.997
0.000
0.383
OFFSET
CHAINAGE 8
CHAINAGE 3
Centreline Data
X = 1990.789 1% -0%
Y = 4621.313
Centreline Data Z = 13.010
Centreline Data X = 1990.583 1%
X = 1990.392 3.11%
12.44% Y = 4615.931 DATUM RL 11.500
Y = 4610.935 Z = 13.250
13.034
13.010
13.010
Z = 13.175
DATUM RL 12.000 DESIGN
DATUM RL 12.000
13.367
13.343
13.250
DESIGN
13.538
13.548
13.175
13.180
12.222
12.209
12.193
DESIGN SURVEY
13.663
13.404
13.115
SURVEY
13.538
13.532
13.184
13.180
-5.388
-2.988
SURVEY
0.000
OFFSET
-5.393
-2.993
0.000
OFFSET
-3.059
-2.998
CHAINAGE 12.385
0.000
0.033
OFFSET
CHAINAGE 2 CHAINAGE 7
Centreline Data
X = 1990.736 1% -0%
Centreline Data Centreline Data Y = 4619.928
X = 1990.545 5.74% 5.77%
X = 1990.353 12.45% 1 in -6 Z = 12.996
Y = 4614.932
Y = 4609.936
Z = 13.122
Z = 13.260 DATUM RL 11.500
DATUM RL 12.000
13.020
12.996
12.996
DATUM RL 12.000 DESIGN
13.566
13.433
13.260
12.957
13.639
13.496
13.122
13.159
DESIGN DESIGN
12.232
12.213
12.195
13.676 SURVEY
13.433
13.144
12.957
13.639
13.541
13.185
13.159
SURVEY SURVEY
-5.389
-2.989
0.000
OFFSET
-5.318
-2.994
0.000
1.817
OFFSET
-3.859
-2.999
0.000
0.217
OFFSET
CHAINAGE 11
CHAINAGE 1 CHAINAGE 6
Centreline Data Centreline Data Centreline Data
X = 1990.315 X = 1990.506 8.24% X = 1990.698 1% 0.7%
12.44% 8.42%
Y = 4608.937 Y = 4613.933 1 in -6 Y = 4618.929
Z = 13.042 Z = 13.270 Z = 13.053
DATUM RL 12.000 DATUM RL 12.000 DATUM RL 11.500
13.427
13.416
13.042
13.626
13.645
13.522
13.270
12.927
13.099
13.075
13.053
DESIGN DESIGN DESIGN
13.427
13.419
13.042
13.626
13.609
13.458
13.168
12.927
12.238
12.219
12.198
SURVEY SURVEY SURVEY
-3.069
-3.000
-4.589
-4.480
-2.995
-5.390
-2.990
0.000
0.000
2.059
0.000
OFFSET OFFSET OFFSET
CHAINAGE 0 CHAINAGE 5 CHAINAGE 10
0 1.0 2.0 3.0 4.0 5.0m
SCALE 1:100 A3
Datum AHD Scale As Shown Status FOR APPROVAL
ABN: 13 609 593 339 Project Proposed Driveway Drawing Title Driveway Cross Sections
Date April 2022 Drawn JAG Checked BG PO Box 5028
NORTH
Maroochydore BC
© 360 Civil Consulting Pty Ltd - All Rights Reserved.
This drawing as been produced for the sole benefit of the Designed JAG Approved BG Location 38 Tristania Dr, Marcus Beach
Client in accordance with the Terms of Agreement. QLD 4558
No responsibility or liability will be assumed to any third BEATRICE GIBBERD RPEQ 14557 Mobile: 0403 862 009
party. This document shall only be used for the site and
project specified.
A 30-05-22 Amendments as per Council IR
Issue Date Description
JAG BG
By Chkd
Email: [email protected] Client Marcus Carroll Project No. 2022033 Dwg No. 05 of 05 Issue A