Lot 21 Caves Road, Preliminary Intersection Report – Rev 2 1

LOT 21 CAVES ROAD, HAMELIN BAY

PRELIMINARY INTERSECTION REPORT Revision 2

Prepared by Calibre Consulting

Date: 26 April 2016

14200

COMMERCIAL IN CONFIDENCE All intellectual property rights, including copyright, in designs developed and documents created by Calibre Consulting (Aust) Pty Ltd remain the property of this company. Any use made of such design or document without the prior written approval of Calibre Consulting (Aust) Pty Ltd will constitute an infringement of the rights of the company which reserves all legal rights and remedies in respect of any such infringement. The information, including any intellectual property, contained in this proposal is confidential and proprietary to the Company. It may only be used by the person to whom it is provided for the stated purpose for which it is provided and must not be imparted to any third person without the prior written approval of the Company. The Company reserves all legal rights and remedies in relation to any infringement of its rights in respect of its confidential information.

Calibre Consulting (Aust) Pty Ltd Unit 5, 53 Victoria Street Bunbury WA 6230 PO Box 733 Bunbury WA 6231 Ph: 08 9791 4411 © 2015

DOCUMENT CONTROL

Rev Date Issue Details Author Checked

1 22/04/2015 Submission to MRWA IC SB 2 26/04/2016 Re-submission to MRWA IC SB

Lot 21 Caves Road, Preliminary Intersection Report – Rev 2 2

Lot 21 Caves Road, Hamelin Bay Preliminary Intersection Report

TABLE OF CONTENTS

1.0 INTRODUCTION 2.0 TRAFFIC ASSESSMENT 3.0 SITE ASSESSMENT 4.0 PROPOSED INTERSECTION STANDARD 5.0 INTERNAL SUBDIVISION ROADS

DRAWINGS

14122P-SP-01 Draft Structure Plan 14200E-CK03 Rev A Intersection Locality and Sight Distance Plan 14200E-CK04 Rev A Concept Intersection Layout Plan

REFERENCES

Austroads Guide to Road Design (Part 4A Unsignalised and Signalised Intersections)

Austroads Guide to Traffic Management (Part 6 Intersections, Interchanges and Crossings)

Lot 21 Caves Road, Preliminary Intersection Report – Rev 2 3

1.0 INTRODUCTION Calibre Consulting are undertaking Structure Planning and associated preliminary engineering on Lot 21 Caves Road, Hamelin Bay. The site is situated approximately 0.4km south of the Caves Road/Hamelin Bay Road West intersection.

Figure 1: Locality Plan (NTS) The development proposal is to subdivide the said land into 35 rural residential lots. Revision 1 of this report was submitted to MRWA in May 2015 and at a meeting on 17 June 2015 the following amendments were discussed:

• One formal intersection off Caves Road is to be provided approximately 200m south of the previously proposed intersection 1. This intersection is to incorporate the adjacent lot access (Lots 1 and 251 Caves Road)

• The previously proposed intersection 2 forms part of the Fire Management Plan for emergency access/egress only.

The subdivision layout was amended to suit MRWA comments and the draft Structure Plan is to be found in the attachments. Figure 2 details the proposed intersection and emergency access points. The northern emergency access point is incorporated into the existing cemetery and beach access.

Lot 21 Caves Road, Preliminary Intersection Report – Rev 2 4

This preliminary report details proposed intersection locations, anticipated traffic volumes and movements, sight distance availability and provisional intersection standard. The objective of the report is to gain Main Roads WA in-principle support for the formal intersection and emergency access.

Figure 2: Draft Structure Plan

Lot 21 Caves Road, Preliminary Intersection Report – Rev 2 5

2.0 TRAFFIC ASSESSMENT 2.1 CAVES ROAD Caves Road has a posted speed limit of 80km/hr adjacent to the proposed development. Pavement width is approximately 6m with unsealed shoulders (1.0m to 1.5m wide). Traffic count data is available for Caves Road 400m west of Bussell Highway (November 2014). Average daily volume (the highest being weekdays) is approximately 760 vehicles. 83% of vehicles are Class 1; 4% Class 2 and 11% Class 3. 2.2 TRAFFIC GENERATION The development will consist of 35 rural residential lots. Detached dwellings typically generate between 8 and 10 vehicle trips per day. This site is a considerable distance from the usual trip destinations. In addition the site has no access to public transport, resulting in a heavy reliance on motor vehicles. Therefore a traffic generation rate of 10 vehicles per day has been adopted for this assessment. Although there will more than likely be a high percentage of lifestyle dwellings, 7.5% to 10% of the total vehicle trips are assumed to occur in the peak hours of 8.00am to 9.00am and 4.00pm to 5.00pm. The morning peak-hour trips will be weighted towards the outbound direction, and the evening peak-hour trips towards the in-bound direction. No proposed future connection to other subdivision roads is possible due to topography, planning limitations and bush reserve covenants. Therefore the trip generation modelled in this assessment represents the likely ultimate scenario. 2.3 TRAFFIC DISTRIBUTION In assessing the intersection on to and from Caves Road the following has been adopted for the purpose of projecting traffic volumes over the road network:

• The busiest day will be modelled based on traffic volumes at 120% of the observed daily traffic volumes (both on Caves Road and within the subdivision);

• Peak a.m. and p.m. volumes will be modelled at 10% of the daily volume; • In the a.m. peak 25% of the trips will be inbound to the subdivision, and 75% will be outbound. • In the p.m. peak, 75% of the trips will be inbound and 25% will be outbound; • 90% of all traffic generated by the proposed subdivision will travel along Caves Road to the Bussell

Highway; and 10% towards Hamelin Bay.

The projected A.M and P.M. peak turning movements at the proposed intersection are detailed in Figures 3 and 4 below.

Lot 21 Caves Road, Preliminary Intersection Report – Rev 2 6

Figure 3: A.M Peak

Figure 4: P.M Peak

RO

AD

1 91

ACCESS ROAD

3 29

CA

VES 9 91

RO

AD

3

91

ACCESS ROAD

1 9

CA

VES

29

91

Lot 21 Caves Road, Preliminary Intersection Report – Rev 2 7

3.0 SITE ASSESSMENT Sight distance was measured at the proposed intersection location in both directions. As per drawing 14200E-CK03 the distances were 220m to the northwest and 280m to the southeast.

Photo 1 Taken at the proposed intersection location looking northwest towards Hamelin Bay Photo 2 Taken at the proposed intersection location looking southeast towards Bussell Highway

In accordance with Austroads Part 4A the Safe Intersection Sight Distance (SISD) at 80km/hr (+ 10Km/hr – i.e. 90km/hr) is 214m (Reaction Time = 2seconds). There is more than adequate SISD in both directions. No assessment is made of the emergency access points as these will only be used in the event of a bushfire and the area will generally be under modified traffic management for the duration of any incident.

Lot 21 Caves Road, Preliminary Intersection Report – Rev 2 8

4.0 PROPOSED INTERSECTION STANDARD The projected volumes at the critical movements are very low in relative terms. An intersection type of ‘Rural Basic’ would be considered appropriate with turn treatment warrants Basic Left Turn (BAL) and Right Turn (BAR) on Caves Road (sealed shoulder widenings).

Figure 5: Basic Left and Right Turn Treatments (Figure 2.1 Austroads Part 6) The intersection will need to be designed and constructed in accordance with Main Roads WA standards. A concept layout is attached to the report (Dwg 14200-CK04). This drawing also details the requested access to Lots 251 and Lot 1. 5.0 INTERNAL SUBDIVISION ROADS Internal subdivision roads would be constructed to a rural standard with a 6m wide seal, an unsealed shoulder and open swale drainage. Road reserves would be 20m in width. A typical cross section is depicted below.

Figure 6: Internal subdivision road cross section

Lot 21 Caves Road, Preliminary Intersection Report – Rev 2 9

DRAWINGS

Lot 21 Caves Road, Preliminary Intersection Report – Rev 2 10

211.47haCAVES

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4529m†

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3591m†

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3274m†

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1.54ha

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2.17ha

84162m†

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3.39ha

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7858m†

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8748m†

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9839m†

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1.28ha

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1.53ha

192.01ha

30

201.14ha

211.45ha

221.49ha

231.82ha

241.52ha

251.69ha

261.86ha

271.89ha

281.53ha29

1.94ha

312.18ha

3.99ha

32

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3.58ha

3.42ha

3.69ha

6.8ha

1.18ha

1.10ha

1250m†

1250m†

1250m†

1000m†

1250m†

1500m†

1500m†

1250m†

1500m†

1500m†

1250m†

1250m†

1250m†

1250m†

2000m†

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2000m†

1250m†

1500m† 1500m†

1000m†

1000m†

1000m†

1000m†

1000m†

1000m†

1000m†

1000m†

1000m†

1000m†

882m†

FOR MRWA (CAVES ROAD)

INCLUDES 10m ROAD WIDENINGNOTE:

REFER TO DETAIL A

Calibre Consulting (Aust) Pty Ltd

Unit 5, 53 Victoria Street

Bunbury WA 6230

Ph 08 9791 4411

www.calibreconsulting.co

0m

Copyright: This document is and shall remain the property of Calibre Consulting (Aust) Pty Ltd.

This plan has been prepared for planning purposes. Areas, contours and dimensions shown are subject to survey.

Aerial:

Co-ords:

Scale:

Rev:

Date:

250

m

DETAILED SECTION A

LEGEND

EXISTING CADASTRE

SUBJECT LAND

PROPOSED CADASTRE

AREAPROPOSED CONSERVATION

BE PLANTEDSCREENING VEGETATION TO

VEGETATION PROTECTION

(SUBJECT TO FINAL DETAILED DESIGN)

VEGETATION TO BE RETAINED

EMERGENCY ACCESSWAY

FIRE SERVICE ACCESS

WALKING TRACK

PROPOSED ROAD

ATTENUATION FOOTPRINTINDICATIVE DRAINAGE

CONTOURS - 2m INTERVALS

(Max. 2000m†)BUILDING ENVELOPE

(Min. 2000m†)PROPOSED WATER TANK RESERVE

20m

WIDE ROAD

RESE

RVE

20m WID

E R

OAD R

ESERVE

EVRE

SER

DAOR EDIW

m02

EV

RE

SE

R

DAOR EDIW m02

EVRESER DAOR

EDIW

m02

STRUCTURE PLANPlan No: 14122P-SP-01

ECW DEC 2013

MGA

A1 @1:2500, A3 @ 1:5000

F

17.03.2016

RO

AD

CAVES

CEMETERYOLD

SCALE: N.T.S.

HAMELIN BAY ENCLAVE - LOT 21 CAVES ROAD, HAMELIN BAY

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CONCEPT LAYOUT PLAN1:250 @ A1

15.0m

NEW EDGE OF SEAL

NEW EDGE OF 1.0m UNSEALED SHOULDER

EXISTING EDGE OF UNSEALED SHOULDER

EXISTING EDGE OF SEAL

EXISTING DRIVEWAY

TO BE SEALED

35.0m 37.5m37.5m

10.0m20.0m

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6.0m

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EXISTING EDGE OF UNSEALED SHOULDER

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