Section C Sector Design Concepts

C–21Western Ring Route – Waterview Connection Urban and Landscape Design Framework Beca • Jasmax • SBEL • NZTA June 2010

C3.1 Patiki Road

C3.1.1 Existing situation

Movement and connectivity

Rosebank and Patiki Road operate as a single interchange

Mainline shifts from a left to right-hand curve passing Rosebank Domain

Constrained off -ramp bridge width does not limit operation of interchange

Local road layout connecting to ramps creates confl icting movements and safety concerns

Local demand for HOV lane to bypass on-ramp signals

Cycleway route would benefi t from additional connection on east side of ramps

Local road adjacent mainline to west of ramps gives vehicle access to Rosebank Domain, forms part of cycleway

No need for local connectivity across the corridor.

Landscape, planting, views

Low amenity views to industrial area travelling east near the raceway

Grassed areas edging the motorway are more extensive and part of the motorist’s outlook

Views from the corridor to Te Atatu landform and Whau estuary.

Urban form

Highly developed industrial / commercial area

Large, high-value industrial buildings very close to mainline

Consistent, functional building and street character.

Structures

Dominant form of dramatic curving concrete off -ramp with steel railing

Cycleway overbridge is narrow with sharp corners and sub-standard approach grades

Cycleway bridge is prominent from several approach angles, but is also dominated by the visual strength of the off -ramp bridge.

C3 Sector 3: Rosebank – Terrestrial

Sector 3 of the project involves the re-confi guration of the existing interchange ramps to improve traffi c merging. The outside lane westbound lane will be “dropped” at the Rosebank exit ramp.

Between the Rosebank Interchange and the Te Atatu Interchange additional lanes will be added to provide four lanes east and westbound. A bus shoulder will also be provided in both directions where space permits between ramps.

Figure C-3.1: Aerial view of Sector 3 from the north

Figure C-3.2: Photo 3–3 Existing view eastwards immediately west of Patiki Road on off -road route

16

1616

1616

Figure C-3.3: Photo 3–2 Existing view westwards from Patiki Photo

Figure C-3.4: Photo 3–1 Existing view eastwards approaching Patiki overbridge on off -road route

Western Ring Route Waterview Connection

C–22 Western Ring Route – Waterview Connection Urban and Landscape Design Framework Beca • Jasmax • SBEL • NZTA June 2010

Figure C-3.5: Patiki Road existing plan

0 10 20 50 100

Photo 3–3

Photo 3–1

Photo 3–2

Section C Sector Design Concepts

C–23Western Ring Route – Waterview Connection Urban and Landscape Design Framework Beca • Jasmax • SBEL • NZTA June 2010

CONCRETE FASCIA PANEL RETAINING WALLS

NOISEWALLS

WELDED WIRE PANEL FENCE

CONCRETE MOTORWAY BARRIER

EXISTING DESIGNATION

SECTION LOCATION

EXISTING VEGETATION

PROPOSED DESIGNATION

TEMP BOUNDARY

Figure C-3.6: Patiki Road concept plan

Western Ring Route Waterview Connection

C–24 Western Ring Route – Waterview Connection Urban and Landscape Design Framework Beca • Jasmax • SBEL • NZTA June 2010

C3.1.2 Design concept

Movement and connectivity

On-ramp revised to accommodate the widened mainline. New on-ramp alignment requires rebuilding of the overbridge

New connection between cycleway and local network on east side of ramps

Cycleway width east of the ramps may be constrained to 2.5m width (compliant with Austroads guidance) between the wider mainline and existing high value building and installations. Detail design is to increase this to 3.5m if possible

Local road to Rosebank Domain to be relocated to allow mainline widening, and rebuilt with separated vehicle and cycle / pedestrian lanes.

Landscape, planting, views

Saltmarsh species are to be planted into the new ‘rip-rap’ boulders forming the coastal armour on the southern edge of the motorway, as soon as areas of armour are completed to minimise establishment of weed species. In cases where additional boulder armour needs to be provided as part of the contract, for example due to settlement, additional plantings should be provided in the same manner

Coastal harbour species planted in strategic location on northern edge of motorway.

Urban form

A strip of land is to be acquired from adjacent land owners, enabling all current uses to be retained.

Structures

Replacement cycleway overbridge with a design that complements other structures in the corridor (Fig. C-3.7 & 8) and contributes to a sense of identity for the cycleway through SH16

Wider overbridge, more sweeping turns and shallower approach grades

White anti-graffi ti paint to be applied to all existing ramp columns, extending to underside of the spreader head units

Existing ramp abutment and adjacent cycleway layout to receive planting and fencing to minimise casual vandalism and accumulation of litter.

DROHC POT BU

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0404

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A

2

332-KSB

332-KSB

00552

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432-KSB

432-KSB

0001

0001

160° 18' 27"

147° 54' 41"

3600

3600

PMAR NO

PMAR NO

1 2

432-KSB

432-KSB

105°

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" 105° 0 0' 00"

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Figure C-3.7: New bridge arrangement over Patiki Road on-ramp

Figure C-3.8: New cycleway bridge at Patiki Road. Note: minimum headroom clearance at ramps = 6.2m

Section C Sector Design Concepts

C–25Western Ring Route – Waterview Connection Urban and Landscape Design Framework Beca • Jasmax • SBEL • NZTA June 2010

C3.2 Rosebank Road

C3.2.1 Existing situation

Movement and connectivity

Rosebank and Patiki Road operate as a single fully-directional interchange

Interchange capacity limited by the width of on and off -ramp bridges

Local road layouts link the two halves of this interchange via a roundabout

Cycleway route would benefi t from additional connection on east side of ramps

Cycleway boardwalk under off -ramp is narrow and has no guardrail

No need for local connectivity across the corridor.

Landscape, planting, views

Varying contours contrast with the horizontal causeway

Coastal edge appears truncated by the motorway

Elevation and sweeping corner create a changing set of views, most noticeable from eastbound mainline and cycleway

Pollen Island and low-lying mud banks are apparent from elevated areas

Westbound views towards less attractive but prominent parts of the industrial area, with limited screening vegetation

Views into and over the corridor from adjacent commercial buildings.

Urban form

Highly developed industrial / commercial close to corridor

Consistent, functional building and street character

Key lots near the corridor off er redevelopment potential recognised.

Structures

Ramps are dramatic concrete sweeps with steel railing

Rosebank cycleway boardwalk is narrow and without guarding.

Figure C-3.9: Photo 3–4 Existing cycleway boardwalk underneath Rosebank off -ramp

Figure C-3.10: Photo 3–5 Existing view westbound, between Rosebank ramps

Figure C-3.11: Photo 3–6 Existing view westbound, between Rosebank ramps

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C–26 Western Ring Route – Waterview Connection Urban and Landscape Design Framework Beca • Jasmax • SBEL • NZTA June 2010

Figure C-3.12: Rosebannk Road existing plan

0 10 20 50 100

Photo 3–6

Photo 3–4

Photo 3–5

Section C Sector Design Concepts

C–27Western Ring Route – Waterview Connection Urban and Landscape Design Framework Beca • Jasmax • SBEL • NZTA June 2010

B

C

C

B

SECTION

SECTION

Figure C-3.13: Rosebank Road concept plan

Western Ring Route Waterview Connection

C–28 Western Ring Route – Waterview Connection Urban and Landscape Design Framework Beca • Jasmax • SBEL • NZTA June 2010

D3.2.2 Design concept

Movement and connectivity

Increased off -ramp length to minimise queueing problems

Mainline widening is achieved without changing on-ramp bridge structures

Cycleway realigned to accommodate mainline widening

Connection from cycleway to local network remains on west side of ramps

Off -road connection to east of ramps when adjacent land is redeveloped

Existing timber boardwalk to be widened and provided with guardrail, all arrangements and fi nishes to be to Austroads standards (refer Figure D-3.14).

Landscape, planting, views

Harbour coastal planted on northern side of motorway, replacing existing weed species

Pattern of planting strategically designed to emphasis views by screening in some areas and revealing in others, and to achieve some vegetative screening of motorway and development when viewed from the harbour.

Urban form

A strip of land is to be acquired from adjacent land owners, enabling all current uses to be retained.

Structures

Retaining wall up to 5.5m high west of the on-ramp, with cycleway on top (refer Figure D-3.15)

Walls are bored pile with concrete panels; concrete vehicle barrier at base

Spill-though areas adjacent the cycleway under the on-ramp are to be fi nished with clay pavers to the full width of the spill-through. Cycleway lights fi xed to overbridges should be replaced with new units

White anti-graffi ti paint to be applied to all existing ramp columns, extending to underside of the spreader head units.

PRECAST CONCRETE FASCIA PANEL WITH CORRUGATED PROFILE AND EXPOSED

AGGREGATE FINISH

1.4m HIGH WELDED WIRE PANEL F

MOTORWAY SURFACE

TOP OF CONCRETE BARRIER

TOP OF WALL

FFLCycle Deck

3500

GALV BIKE RAIL NOMINAL80Ø OD

GALV HANDRAIL 40Ø OD

STANCHIONS SIDE FIXED TOBRIDGE PLATE 20mm (T.B.C) @1200 CNTRS PAINT FINISH

BALUSTRADE PANELS20x5mm STEEL FLATS @MAX 100mm SPACINGSPAINT FINISH

CYCLE BRIDGE DECK @HEIGHT OF ROAD BARRIER

3080 min between guardrail centres

FFLHigh Water Level

2500

100x75 timber deck. Areas with curving alignment to be formed from'ripped' ex.200x75 timbers. Deck to be finished with anti-slip adhered gritcoating to provide minimum 10 years service life.

Supporting structure all to Engineer'sdesign and specification, materialbelow cycleway deck may usealternatives to achieve appropriatedurability

Edge beam to provide balustrade fixing andform kerb upstand to Code standards

Figure C-3.14: Detail for future cycleway boardwalk under Rosebank off -ramp

Figure C-3.15: Future retaining wall west of Rosebank ramps

Section C Sector Design Concepts

C–29Western Ring Route – Waterview Connection Urban and Landscape Design Framework Beca • Jasmax • SBEL • NZTA June 2010

Refer Figure 56 for detailed section

Figure C-3.16: Enlargement of future cross section at Rosebank off -ramp (section C) Figure C-3.17: Future cross-section at Rosebank off -ramp (section C)

Figure C-3.18: Future cross-section immediately west of Rosebank Road compared with existing arrangement (section B)

Western Ring Route Waterview Connection

C–30 Western Ring Route – Waterview Connection Urban and Landscape Design Framework Beca • Jasmax • SBEL • NZTA June 2010

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