Appendix C2Conceptual Traffic Management Plan
C2
Conceptual Traffic
Managem
ent Plan
Intrapac
Noonamah Ridge Estate
Conceptual Traffic Management Plan
Issue | 16 November 2015
This report takes into account the particular
instructions and requirements of our client.
It is not intended for and should not be relied
upon by any third party and no responsibility
is undertaken to any third party.
Job number 240596-00
Arup
Arup Pty Ltd ABN 18 000 966 165
Arup
Level 17
1 Nicholson Street
East Melbourne VIC 3002
Australia
www.arup.com
| Issue | 16 November 2015 | Arup
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Intrapac Noonamah Ridge Estate
Conceptual Traffic Management Plan
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Contents
Page
1 INTRODUCTION 1
1.1 Report Purpose 1
1.2 Previous Documents 1
1.3 Report Structure 1
1.4 Objectives 3
1.5 Referenced Documents 3
1.6 Glossary of Terms 3
1.7 Definitions 4
2 PROJECT OVERVIEW 6
2.1 Proposed Development 6
2.2 Commencement / Expected Duration Of Works 7
2.3 Constraints 7
2.4 Project Representatives 7
2.5 Responsibilities / Accreditation 7
3 SAFETY PLAN 10
3.1 Damage To Services 10
3.2 Dangerous Goods / Hazardous Conditions 10
3.3 Emergency Services 10
3.4 Failure Of Services 11
3.5 Incident / Accident Procedures 11
3.6 Mobile Phones 11
3.7 Night Work Provisions 11
3.8 Noise 12
3.9 Personal Protective Equipment (PPE) 12
3.10 Protection Of Excavations 12
3.11 Radio Communications 12
3.12 Setting Up And Dismantling 12
3.13 Trip Hazards 12
4 ENVIRONMENTAL CONDITIONS 14
4.1 Dust / Fog / Smoke 14
4.2 Heat And Humidity 14
4.3 Lightning 14
4.4 Rain 14
4.5 Terrain 14
4.6 Wind 15
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5 TRAFFIC CONDITIONS 16
5.1 Traffic Volume 16
5.2 Existing / Proposed Speed Restriction/S 16
5.3 Lane Widths And Capacity 16
5.4 Impact On Adjoining Network 16
5.5 Parking Facilities 16
5.6 Public Transport 16
5.7 Access To Adjoining Properties 16
5.8 Non-Vehicular Road Users 16
5.9 Access For Work Vehicles And Personnel 17
6 MISCELLANEOUS 18
6.1 Audit Provisions 18
6.2 Records 18
6.3 Special Events And Other Works 18
6.4 Traffic Control Devices 18
6.5 Variations To Standards 18
7 RISK MANAGEMENT 19
7.1 Hierarchy of Control 19
7.2 Risk Assessment 20
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1 INTRODUCTION
1.1 Report Purpose
Arup has been engaged by Byrne Design on behalf of Intrapac to prepare the
conceptual Traffic Management Plan (TMP) to support the EIS of the Noonamah
Ridge Estate (NRE) Development located within the Shire of Litchfield as shown
in Figure 1.
This Traffic Management Plan (TMP) is designed to provide an outline of the
approach to traffic management that is expected to be adopted by the principal
contractor and traffic control service provider during works associated with the
construction of the proposed development. This is in order to maximise safety in
the workplace whilst making all reasonable attempts to minimise disruption to
road users and other members of the public. The traffic guidance scheme may
include measures such as lane closures, temporary speed limit installation, traffic
diversion/s, signage installation, public communication and other temporary
measures to warn, instruct and guide road users in the safe negotiation of the work
site.
This document would be further developed in consultation between the proponent
and key stakeholders once the details of the construction works are further
defined.
1.2 Previous Documents
Other documents that should be read in conjunction with this report include:
NRE Transport Impact Assessment (TIA), Arup, 25 August 2015: an
assessment that focuses on the transport impact as a result of the development
for various stages; and
NRE Construction Monitoring Report, 16 November 2015: a document
that provides an overview of the approach to monitoring impacts associated
with the construction of the proposed development.
1.3 Report Structure
The report is structured as follows:
Section 1 introduces the TMP (this section);
Section 2 describes a summary of the project;
Section 3 outlines the safety plan;
Section 4 outlines the environmental conditions;
Section 5 outlines the traffic conditions;
Section 6 describes other miscellaneous conditions;
Section 7 outlines the risk management approach.
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Figure 1 Site location
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1.4 Objectives
The objectives of this TMP are to:
to establish efficiencies, consistencies and good understanding of the required
commitment to safety.
provide a safer working environment thus minimising the risk of injury and/or
property damage for all workers, road users and members of the public.
safely and efficiently manage the safe passage of all road users through, past
or around the work site 24 hours a day, from possession of the site to
completion of all works.
minimise disruption, congestion and inconvenience to all road users and other
members of the public.
1.5 Referenced Documents
NT Work Health and Safety (National Uniform Legislation) Act 2011.
NT Work Health and Safety (National Uniform Legislation) Regulations
2011.
NT Control of Roads Act 2011.
NT Traffic Act 2010 NTDOI Technical Requirements for Works Within the
NT Government Road Reserve
Australian Standard AS1742.3-2009; Manual of uniform traffic control
devices – Part 3: Traffic control for works on roads. The exception is where
expressly overridden by the NTDOI Technical Requirements for Works
Within the NT Government Road Reserve.
AS/NZS ISO 31000:2009; Risk management – principles and guidelines.
AS/NZS 4602; High visibility safety garments.
AS/NZS 4192; Illuminated flashing arrow signs.
AS/NZS 1906.1; Retro-reflective materials.
AS/NZS 3845; Road safety barrier systems.
AS 4191; Portable traffic signals.
NT WorkSafe; All relevant bulletins.
1.6 Glossary of Terms
AS Australian Standard
AS/NZS Australian and New Zealand Standard
NTDOI Northern Territory Department of Infrastructure
NTMVR Northern Territory Motor Vehicle Registry
NTRTO Northern Territory Registered Training Organisation
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OH&S Occupational Health & Safety
TCD Traffic Control Diagram
TMP Traffic Management Plan
VPH Vehicles Per Hour
WZTM Work Zone Traffic Management
1.7 Definitions
Built-up area
Roadside development comprising property accesses at frequent spacing’s over a
specified distance.
Dimension D
A distance expressed in metres for the positioning of advance signs and related
purposes determined in accordance with the speed of traffic.
Long-term
The description which applies to a work site and/or traffic guidance scheme
operating in excess of a single work shift, both day and night, and may be left
unattended.
Open road area
Roadside development comprising property accesses over large spacing’s over a
specified distance.
Road user
Any driver, rider, passenger or pedestrian using the road.
Roadway
The portion of the road devoted particularly to the use of vehicles, inclusive of
road shoulders and auxiliary lanes.
Shall
Indicates that a statement is mandatory.
Should
Indicates that a statement is a recommendation.
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Short-term
The description which applies to a work site and/or traffic guidance scheme that is
required only while work personnel are in attendance that is generally limited in
duration to a single work shift or lesser period of time where after road conditions
are returned to normal.
Traffic
All vehicles, persons or animals travelling on a road.
Traffic guidance scheme
An arrangement of temporary signs and devices to warn traffic and guide it
through, past or around a work area or temporary hazard.
Work area
The specific area where work is being conducted.
Work site
An area which includes the work area/s and any additional length of road required
for advance signing, tapers, delineation, detours, or other areas for associated
purposes.
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2 PROJECT OVERVIEW
2.1 Proposed Development
The concept master plan for NRE is provided in Figure 2 with Table 1 providing a
breakdown of the high level development programme.
NRE is a development 36km south-east of Darwin
CBD. The site is currently undeveloped with
occasional residential, agricultural and other rural
activities. NRE is proposed as a master-planned
rural and per-urban community, with a range of
living alternatives. It is envisaged to comprise
approximately 4,155 homes accommodating
around 11,000 people, and will be delivered over
approximately 27 year timeframe. It will consist
of two rural activity centres, potentially including
local shops and services, as well as community
facilities. An enterprise area is also proposed.
Further information on the proposed development
is discussed within the TIA report.
Figure 2 Concept master plan
Table 1 Development program
Stage Timeframe (Year) Land Uses Land Area (ha) No. Residential Lots
Stage 1 1 – 6 Residential
Village Centre
320
1.6
640 lots
Stage 2 7 – 10 Residential 301 611 lots
Stage 3 11 – 15 Residential 292 584 lots
Stage 4 16 – 20 Residential 357 713 lots
Stage 5 21 – 22 Residential
Enterprise Area
202
192
405 lots
Stage 6 23 – 24 Residential 308 616 lots
Stage 7 25 – 27 Residential 283 586 lots
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2.2 Commencement / Expected Duration Of Works
TBC
2.3 Constraints
It is acknowledged that construction works may impact traffic flow especially
during peak periods. It is recommended the TMP consider works to ensure traffic
flow is not impeded in the urban area from Monday to Friday, excluding public
holidays, between 07:00 and 09:00 and between 15:30 and 17:30.
2.4 Project Representatives
Road Authority:
NT Government Department of Infrastructure; 2nd Floor Highway House,
Palmerston Circuit, Palmerston NT 0831; and
NT Government Department of Transport, Transport Infrastructure Planning
Division; Level 1 Energy House, 18-20 Cavenagh Street, Darwin NT 0801.
Client / Project Management:
Intrapac (Project Management will be confirmed closer to construction start
date)
Principal Contractor:
TBC
Traffic Management Plan Designer / Traffic Management
Provider:
TBC
2.5 Responsibilities / Accreditation
2.5.1 Hierarchy of Responsibility:
Intrapac ↦Contractor↦ Site workers, Subcontractors, Traffic Control
2.5.2 Project Manager / Site Supervisor:
The project manager has the ultimate responsibility to ensure this TMP is
implemented in full for the prevention of injury and property damage to
employees, other contractors, sub-contractors, road users and all members of the
public.
The project manager shall:
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ensure all site personnel are fully aware of their responsibilities and are
instructed concerning hazards and how to avoid injury.
provide safety equipment, protective clothing and devices, first aid facilities
and ensure all personnel observe good safety practices at all times.
ensure all construction workers, including traffic management personnel,
involved with the project are accredited to safely work in the construction
industry.
ensure that traffic controllers have been appropriately trained and that
sufficient traffic controllers are available to ensure appropriate breaks are
taken.
ensure all traffic control measures are placed and maintained in accordance
with this TMP prior to the commencement of works.
ensure suitable communication and consultation with affected stakeholders is
maintained at all times.
ensure inspections of the traffic management are undertaken in accordance
with this TMP, and results recorded.
review feedback from field inspections, worksite personnel and members of
the public, and take action to amend the traffic control measures as appropriate
following approval from the TMP Designer and the Road Authority’s
Representative.
arrange and/or undertake any necessary incident / accident investigations.
2.5.3 Workers and Sub Contractors
Workers and subcontractors shall:
have accreditation to safely work in the construction industry.
correctly wear high visibility clothing, in addition to other personal protective
equipment (PPE) required (e.g. protective footwear, eye protection, safety
helmet, sun protection, respiratory devices, safety harnesses, etc.), at all times
whilst on the work site.
comply with the requirements of this TMP and ensure no activity is
undertaken that will endanger the safety of other workers, road users or
members of the public.
enter and leave the site by approved routes and in accordance with safe work
practices.
obey all instructions from traffic control personnel.
2.5.4 Traffic Management Plan Designer
Accreditation as a Traffic Management Plan Designer is a mandatory requirement
in the NT for planning, designing, drafting and modifying TMPs and conducting
the relevant risk assessment for works or events within or impacting upon road
reserves throughout the NT.
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It is recommended:
TMPs not be appraised for appropriateness by any officer representing the
road authority for works or events within its road reserve unless the designer
has the appropriate level of accreditation and their accreditation number is
quoted on all TMPs.
at least one accredited Traffic Management Plan Designer shall be available to
attend the site at short notice at all times to manage variations, contingencies
and emergencies, and to assume overall responsibility for traffic management.
2.5.4.1 Work Zone Traffic Supervisor
The Work Zone Traffic Supervisor shall:
have the responsibility of ensuring the traffic management devices are
implemented and maintained in accordance with this TMP.
instruct Traffic Controllers on the relevant safety standards, including the
correct wearing of high visibility safety clothing.
undertake and submit the required inspection and evaluation reports to
management.
render assistance to road users and stakeholders when incidences arising out
of the works affect the network performance or the safety of road users and
workers.
take appropriate action to correct unsafe conditions, including any necessary
modifications to the TMP.
2.5.4.2 Traffic Controllers
Traffic Controllers shall be used to control road users to avoid conflict with plant,
workers, traffic and pedestrians, and to stop and direct traffic in emergency
situations.
Traffic Controllers must be briefed on the work activity including details of work
sequences to ensure clear and effective traffic control instructions are given to
road users.
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3 SAFETY PLAN
3.1 Damage To Services
In the event that utilities services such as gas or electricity are damaged, the TMP
should consider potential measures such as:
stopping work immediately;
turning off machinery and vehicles;
clearing the area of personnel;
deploying Traffic Controllers (and other personnel if necessary) to ensure no
traffic or other road users approach the area;
calling NT Police and the relevant supply authority.
Damage to other less critical utilities services such as water or sewerage may be
treated in a similar manner except machinery may remain operational and access
may be maintained where it is safe to do so.
All site personnel shall be briefed on evacuation, muster area and control
procedures at a daily prestart tool box talk.
3.2 Dangerous Goods / Hazardous Conditions
The TMP would expect to consider:
Transportation of bitumen shall only be conducted by appropriately qualified
and competent personnel.
The arrival of trucks carrying bitumen, fuel or other miscellaneous dangerous
goods to or through the site shall be communicated to the site supervisor by
the traffic controller/s.
All site personnel shall be briefed on evacuation, muster area and control
procedures.
3.3 Emergency Services
As part of the construction works, an objective shall be to not have a significant
impact on emergency services. If emergency services may be impacted due to
TMP works (temporary speed restrictions and lane closures etc.) it is
recommended emergency services to be notified in writing of the nature of works,
location, date/s and times.
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3.4 Failure Of Services
3.4.1 Failure of Street Lighting
In the event of street light failure, the TMP should consider contacting the Power
and Water Corporation. If street lighting cannot be repaired within a reasonable
period of time, sufficient portable lighting is not readily available and/or if it is
deemed unsafe for workers and road users alike, it may be necessary to cease
works and remove all delineation from the traffic lanes until such time as repairs
may be made.
3.4.2 Failure of Power
TBC with contractor if mains power is required for works to proceed.
3.5 Incident / Accident Procedures
In the event of an incident or accident, whether or not involving traffic or road
users, the TMP shall consider measures such as:
stopping work and traffic as necessary to avoid further deterioration of the
situation.
administering first aid, and medical assistance shall be called for if required.
reporting any traffic crash resulting in injury to the NT Police.
broken down vehicles and vehicles involved in minor non-injury crashes shall
be temporarily moved to the verge as soon as possible after details of the crash
locations have been gathered and noted. Where necessary to maintain traffic
flow, vehicles shall be temporarily moved into the closed section of the work
area behind the bollards, providing there is no risk to vehicles and their
occupants or workers. Suitable recovery systems shall be notified to facilitate
prompt removal of broken down or crashed vehicles. Assistance shall be
rendered to ensure the impact of the incident on the network is minimised.
Details of all incidents and accidents shall be reported to the Project Manager as
soon as practicable using an Incident / Accident Report Form.
3.6 Mobile Phones
Traffic Controllers shall not, under any circumstance, use mobile phones whilst
actively controlling traffic.
Mobile phones, if taken to a work site, should be left in a work vehicle at the
owner’s risk. Under no circumstance shall a call be made or answered whilst
situated on or adjacent to a roadway and/or within the work area.
3.7 Night Work Provisions
TBC with contractor if night works are being undertaken on this project.
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3.8 Noise
There are no known nearby facilities which require specific noise limiting
measures.
3.9 Personal Protective Equipment (PPE)
3.9.1 High-visibility Clothing for Work Personnel
High-visibility clothing shall be worn by all personnel working in or adjacent to
traffic, including traffic at work sites. The clothing is designed to make the
personnel more conspicuous and to warn road users of their presence.
3.9.2 Other PPE
All personnel entering the work site shall correctly wear other personal protective
equipment including, but not limited to, protective footwear, safety helmet, sun
protection, etc.) at all times whilst on the work site.
3.10 Protection Of Excavations
TBC.
3.11 Radio Communications
Portable two-way radios shall be used for communication between traffic
controllers as required.
3.12 Setting Up And Dismantling
Setting up of the traffic management shall be carried out starting at the
ROADWORKS AHEAD sign and proceeding to the END ROADWORKS sign.
Dismantling shall be carried out in the reverse order.
Signage displayed outside working hours shall be secured using spikes embedded
in the ground or wired to suitable existing infrastructure or erected on temporary
signs legs with suitable weighting for stabilization from wind, etc.
Devices no longer required shall be promptly and completely removed from road
users lines of sight.
3.13 Trip Hazards
The work site and its immediate surroundings shall be suitably protected and free
of hazards which could result in tripping or falling by workers and non-vehicular
road users. Hazards which cannot be removed shall be suitably protected using
temporary steel pedestrian exclusion fencing to prevent injury to workers and road
users, including those with sight impairment. Where level differences are
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significant, temporary steel pedestrian exclusion fencing shall be installed to
prevent access.
Where works extend beyond daylight hours and adjacent lighting is insufficient to
illuminate hazards to workers and non-vehicular road users, appropriate
temporary lighting may be installed.
The work site shall be kept tidy to reduce the risk to workers and other non-
vehicular road users.
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4 ENVIRONMENTAL CONDITIONS
4.1 Dust / Fog / Smoke
The work area shall be watered as necessary to prevent dust generation by works
vehicles and machinery.
Where sight distances are significantly reduced by dust, fog, smoke, or similar,
and/or if it is deemed unsafe for workers and road users alike, it may be necessary
to cease works and remove all delineation from the traffic lanes until conditions
return to normal.
4.2 Heat And Humidity
Extremes of heat and humidity are experienced in the Northern Territory however
there is no single factor such as a “maximum allowable temperature” which may
be applied in a workplace as a “cease work” limit.
Traffic controllers actively controlling traffic using a STOP/SLOW bat shall, as a
minimum, be relieved from their duty after not more than 2 hours for a period of
rest or other duties of at least 15 minutes.
4.3 Lightning
Traffic controllers shall avoid actively controlling traffic using STOP/SLOW bats
whilst lightning is prevalent within close proximity.
As far as practicable, where traffic controllers are positioned to actively control
traffic using STOP/SLOW bats, contractors and subcontractors shall be aware of
approaching storms with the potential for lightning and shall take appropriate
action in preparation to return the roadway to normal in order that delineation may
be removed and traffic controllers stood down temporarily from their duties to
seek appropriate protection.
4.4 Rain
In the event of rain, sign spacing and tapers may be extended, within allowable
tolerances, by approximately 25% to account for increased stopping distances. All
changes shall be recorded in the daily diary.
In the event of extremely heavy rain causing road flooding and/or sight distance
issues, it may be necessary to cease works and remove all delineation from the
traffic lanes until conditions return to normal.
4.5 Terrain
In some locations such as Elizabeth Valley Road, the vertical geometry of the
roads impacts on line of sight distances. The TMP should consider measures such
as reducing speed and traffic controllers to ensure the works can be undertaken in
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safe conditions. Further details on management measures should be provided
once construction routes are known.
4.6 Wind
Signage and delineation shall require additional weighting, placement of bollard
bases or similar, for stabilization during periods of high wind.
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5 TRAFFIC CONDITIONS
5.1 Traffic Volume
Refer to the Transport Impact Assessment Report issued by Arup on 28 August
2015 for existing traffic volumes in vicinity of the site.
5.2 Existing / Proposed Speed Restriction/S
The existing speed limit for each road and the operating speed (85th percentile)
will be estimated to be no greater than the original posted speed limit.
Temporary speed restrictions shall be considered on all approaches to
intersections if:
Whilst personnel are present and working within 1.2m of the travelled path of
vehicles.
Whilst traffic controllers are required to continually control traffic using a
stop/slow bat.
5.3 Lane Widths And Capacity
Minimum lane widths of 3m will be maintained during working hours and
minimum lane widths of 3.5m will be maintained at all other times.
5.4 Impact On Adjoining Network
Minimal traffic congestion is expected.
5.5 Parking Facilities
There are no existing parking facilities that will be affected by the work site.
5.6 Public Transport
Public transport is not expected to be affected by the works being undertaken.
5.7 Access To Adjoining Properties
No other property accesses shall be affected by the works being undertaken.
5.8 Non-Vehicular Road Users
The TMP should consider the safety of pedestrians and cyclists within / near work
areas.
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5.9 Access For Work Vehicles And Personnel
The construction contractor shall establish a gated interim access to the site.
Work vehicles and personnel entering and leaving the worksite shall do so via this
gated interim access point. This shall be communicated to all by way of internal
memorandum.
Traffic control personnel may be used at the designated interim access point to
temporarily restrict traffic flow whilst works vehicles and personnel are entering
or leaving the worksite or parts thereof. Where traffic controllers are not used to
restrict traffic flow, works personnel are to give way to all road users and proceed
with extreme caution whilst entering / exiting the worksite or crossing active
traffic lanes.
Advance warning signage shall be installed advising other road users of the
construction vehicles entering ahead.
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6 MISCELLANEOUS
6.1 Audit Provisions
Given the limited detail in regards to the construction approach, this is a
conceptual TMP for future guidance. This document would be further developed
in consultation between the proponent and key stakeholders once the details of the
construction works are further defined.
6.2 Records
Frequent inspections shall be carried out if conditions are found to vary
significantly and recorded in a Daily Diary.
All variations to this TMP shall be recorded in a Daily Diary.
Incidents / accidents shall be recorded using an Incident / Accident Report Form
and shall be forwarded to the Project Manager.
6.3 Special Events And Other Works
There are no other known work sites within close proximity of this project. If this
changes where it is expected to impact construction works and the TMP, it is
recommended to revisit the TMP to make any required changes.
6.4 Traffic Control Devices
Should a situation arise that is not covered by this conceptual TMP which requires
the use of additional or reduced number of devices, they shall be recorded within
the Daily Diary as a variation, following prior approval by the Traffic
Management Plan Designer.
6.5 Variations To Standards
Significant variations shall not be carried out without prior consultation with the
Traffic Management Plan Designer, however minor adjustments to suit site and
work requirements are recommended with such changes to be recorded in the
Daily Diary.
In emergency situations, on-site variations shall be made and recorded in the
Daily Diary.
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7 RISK MANAGEMENT
The following sections outline the hierarchy of control as well as the risk
assessment methodology. The risk assessment is to be developed in the next
revision once the construction methodology is known and a contractor has been
appointed.
The risk assessment process shall be undertaken in accordance with Australian
Standard AS/NZS ISO 31000:2009; Risk management – principles and
guidelines.
7.1 Hierarchy of Control
Risk Treatments shall be based on the Hierarchy of Hazard Control. The
Hierarchy of Control forms a tiered approach to the management of workplace
hazards. Each control principle is listed in descending order according to its
preference and effectiveness.
Elimination
Remove the hazard completely, e.g. total and physical road closure / divert traffic
away from the work area.
Substitution
Swap the hazard for something less dangerous, e.g. undertaking drainage / service
works using trench-less technology.
Isolation
Lower the risk by restricting or preventing access to the hazard, e.g. temporary
road closure restricting access to non-local area traffic.
Engineering Controls
Lower the risk by using better equipment or processes, e.g. installation of safety
barriers, use of temporary traffic signals instead of traffic controllers in high risk
environments, reverse alarms on reversing plant.
Administrative Controls
Policies, rules or changes to the way a company and workers operate, e.g.
development of a traffic management plan and site safety plan, safe work
procedures for workers around mobile plant, procedures for installation/removal
of signage under traffic, safety induction/s and communication procedures,
variable message boards.
Personal Protective Equipment (PPE)
This should be used as a last resort and normally in conjunction with other control
measures, e.g. use of high visibility vests, night wands, etc.
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7.2 Risk Assessment
7.2.1 Methodology
The likelihood of an event or hazard occurring shall first be assessed over the
duration of the activity (i.e. “period of exposure”). For risk assessment purposes
the assessed likelihood shall then be proportioned for a “period of exposure” of
one year.
For Example: An activity has a duration of 6 weeks (i.e. “period of exposure” = 6
weeks). The event or hazard being considered is assessed as likely to occur once
every 20 times the activity occurs (i.e. likelihood or frequency = 1 event/20 times
activity occurs = 0.05 times per activity). Assessed annual likelihood or frequency
= 0.05 times per activity x 52 weeks/6 weeks = 0.4 times per year. Assessed
likelihood = C (i.e. Possible)
Table 2 Qualitative Measures of Likelihood
Level Descriptor Description
A Almost Certain The event or hazard is expected to occur in most circumstances -
will probably occur with a frequency in excess of 10 times per year.
B Likely The event or hazard will probably occur in most circumstances -
will probably occur with a frequency of between 1 and 10 times per
year.
C Possible The event or hazard might occur at some time - will probably occur
with a frequency of 0.1 to 1 times per year (i.e. once in 1 to 10
years).
D Unlikely The event or hazard could occur at some time - will probably occur
with a frequency of 0.01 to 0.1 times per year (i.e. once in 10 to 100
years).
E Rare The event or hazard may occur only in exceptional circumstances -
will probably occur with a frequency of less than 0.01 times per
year (i.e. less than once in 100 years)
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Conceptual Traffic Management Plan
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Table 3 Qualitative Measures of Consequence or Impact
Level Descriptor Injury Damage Traffic/ Network Performance
1 Insignificant First Aid
required /
immediate
return to work.
Less than
$5,000
Hourly traffic flow is equal to or less
than the allowable road capacity as
detailed in AS1742.3-2009. No impact
to the performance of the network.
2 Minor Minor medical
treatment / no
lost time injury
occurs.
$5,000 to
$10,000
Hourly traffic flow is greater than the
allowable road capacity and less than
110% of the allowable road capacity as
detailed in AS1742.3-2009. Minor
Impact.
3 Moderate Medical
treatment
required /
hospitalization /
WorkSafe
report.
$10,000
to
$20,000
Hourly traffic flow is greater than110%
and less than 135% of the allowable
road capacity as detailed in AS1742.3-
2009. Moderate impact.
4 Major Significant
injuries /
hospitalization /
WorkSafe
report / lost time
injury occurs
$20,000
to
$40,000
Hourly traffic flow is greater than
135% and less than 170% of the
allowable road capacity as detailed in
AS1742.3-2009. Major impact.
5 Catastrophic Death /
permanent
disability /
WorkSafe
prosecution.
More
than
$40,000
Hourly traffic flow is greater than
170% of the allowable road capacity as
detailed in AS1742.3-2009.
Unacceptable impact to the
performance of the network.
Table 4 Management Approach for Residual Risk Rating
Residual Risk Rating Required Treatment
E Extreme Risk HOLD POINT. Work cannot proceed. Avoidance or elimination of
risk preferred. Superintendent must review and sign-off.
H High Risk Treatment may look to reduce consequence or likelihood. If both is
impractical, Project Manager can approve treatment and signs off
activity.
M Moderate Risk Documented management procedure and prescribed risk treatment
subject to review by experienced management.
L Low Risk Managed in accordance with the approved standard management
procedures and documented standard work practices.
A Accept Standard informal and formal work practices manage such.
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Table 5 Qualitative Risk Analysis Matrix – Risk Rating
Consequence or Impact
Likelihood 1
(Insignificant)
2
(Minor)
3
(Moderate)
4
(Major)
5
(Catastrophic)
A (Almost
Certain)
L M H E E
B (Likely) L M H H E
C (Possible) A L M H E
D (Unlikely) A L M H H
E (Rare) A A L M M
7.2.2 Risk Assessment
The risk assessment is to be developed in the next revision once the construction
methodology is known and a contractor has been appointed.
Potential hazards that may require assessment include:
Traffic control personnel unaware of safe work practices.
Traffic control personnel suffering cuts and/or lifting injury whilst handling
signs/delineation/other equipment.
Traffic control personnel invisible to approaching motorists.
Traffic control personnel becoming dehydrated and subsequently suffering
heat stroke, ignoring safe work practices, misdirecting traffic, etc.
Traffic control personnel involved in traffic accident whilst driving traffic
control vehicle.
Traffic control personnel being struck by a vehicle whilst installing, operating,
monitoring or removing a traffic guidance scheme.
Traffic control / works personnel being struck by an item within the work
area.
Workers operating within close proximity of high-speed traffic.
Failure of motorists to observe the temporary work zone speed restrictions.
Closure of traffic lane/s and the use of traffic controllers to alternate traffic
flow via a single traffic lane reducing road capacity below a serviceable level
leading to traffic congestion during peak traffic periods.
Closure of traffic lane/s and/or the installation of temporary speed restrictions
reducing road capacity below a serviceable level leading to traffic congestion.
Closure of traffic lane/s creating a danger of rear-end / sideswipe / head-on
collision between merging traffic.
Parking of works vehicles / items of plant creating a traffic hazard.
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Works vehicles / items of plant entering to or exiting from the work area
creating a traffic hazard and a danger of rear end / sideswipe collision.
Pedestrians too close to and/or accessing work area suffering injury from
moving plant or trip/fall hazard.
Heat stroke.
Extremely heavy rain fall creating temporary road flooding and reducing sight
distance of approaching motorists.
Vehicle breakdown/crash causing obstruction to traffic and/or danger to
workers.
Construction activity creating a dust hazard reducing sight distance for
approaching motorists.
Signs dirty / damaged and hard to read.