Two engineers in hard hats reviewing plans on site

Traffic EngineeringVMPs, Access & Parking Solutions

Traffic engineering for NSW development approvals — Vehicle Movement Plans, access assessments, parking layout reviews, and Traffic Management Plans accepted by TfNSW and council.

TRAFFIC.

Infrastructure Engineering

Every development that generates traffic needs an engineer to quantify it

Whether you are developing a residential subdivision, a commercial tenancy, an industrial facility, or a mixed-use precinct, your development will interact with the surrounding road network. NSW councils, Transport for NSW (TfNSW), and Roads and Maritime Services (RMS) all require applicants to demonstrate that this interaction is safe, that access is designed to the appropriate standard, and that sufficient on-site parking is provided in compliance with Australian Standards and local parking rates.

At IA Engineering, our traffic team provides practical, approval-ready traffic engineering services for development applications across Greater Sydney and NSW. We work closely with your architect, town planner, and civil engineer to address traffic and parking requirements from the earliest design stage — ensuring that access layouts, Vehicle Movement Plans, and parking provisions satisfy the relevant authorities before submission.

The outcome: a development application supported by robust traffic engineering documentation — accepted by TfNSW, council, and certifiers on first submission, with access and parking designs that work safely and efficiently from day one of operation.

Aerial view of a commercial car park dissolving into the vehicle movement plan drawn over it, with swept turning paths marked
Traffic Engineering

Access design that satisfies TfNSW and council

We assess your site geometry, traffic generation, and the surrounding road network before designing an access and parking strategy — so the layout works for your future tenants and passes every agency review.

  • Vehicle Movement Plans (VMP)
  • Traffic Management Plans (TMP)
  • Access & driveway assessments
  • Parking layout design to AS/NZS 2890
Marked-up isometric plan of a basement car park, annotated with bollards, wheel stops, convex mirrors, warning lights, waiting bays, and signage, with a legend of every element
Parking layout and access review for a mixed-use commercial basement in Western Sydney — bollards, wheel stops, mirrors, and signage specified to AS/NZS 2890 and issued as a marked-up plan the builder can work straight from.

TfNSW & RMS Requirements

When TfNSW referral is required and what it involves

Transport for NSW (TfNSW) — formerly Roads and Maritime Services (RMS) — is a concurrence authority for development applications that involve access to classified roads or that generate significant traffic volumes above council-determined thresholds. When TfNSW referral is triggered, your DA must be accompanied by a Traffic Impact Assessment (TIA) prepared in accordance with the TfNSW Guide to Traffic Generating Developments.

The TIA must demonstrate that the proposed access complies with Austroads Guide to Road Design standards, that sight distances are adequate, that queue lengths on the public road are acceptable, and that any required road infrastructure contributions or upgrades are identified. For large generators, a full intersection capacity analysis using SIDRA or similar software may be required.

Our traffic engineers are experienced in preparing TIA documents that satisfy TfNSW requirements — structuring the analysis in the format the agency expects, pre-empting the questions reviewers typically raise, and coordinating directly with TfNSW officers when required to resolve technical queries before they become formal objections.

When a Vehicle Movement Plan is required

  • Multi-residential developmentsMedium- and high-density residential developments with communal car parks or basement access require a VMP demonstrating that all design vehicles can enter, manoeuvre, and exit without obstruction.
  • Commercial & retail tenanciesLoading dock access, service vehicle routes, and customer car park circulation must all be demonstrated to council — particularly where the site has constrained frontage or shared access.
  • Industrial & warehouse facilitiesSemi-trailer and B-double access requires swept path analysis to Austroads design vehicle templates, demonstrating that the largest expected vehicle can navigate the site without encroaching on adjacent traffic lanes.
  • Childcare centres & schoolsPick-up and drop-off arrangements, queuing space, and pedestrian safety are scrutinised closely by council. A VMP showing how vehicles enter, queue, and exit is a standard requirement.
  • Mixed-use developmentsWhere residential, retail, and commercial traffic share a single access point, a VMP is required to demonstrate that conflicts between user types are minimised and managed safely.
  • Any site on a classified roadAccess to a TfNSW-classified road triggers a higher level of review regardless of development type. A VMP and sight distance assessment are minimum requirements.

Our Scope

Traffic and parking services we deliver

Our traffic engineering team provides the full range of documentation and design services required for development applications, construction certificates, and operational approvals across Greater Sydney and regional NSW.

Vehicle Movement Plans (VMP)

Swept path analysis and manoeuvring diagrams using AutoTURN or equivalent software, demonstrating that design vehicles — from passenger cars to B-doubles — can navigate the site safely without encroaching on footpaths, kerbs, or adjacent traffic lanes. VMPs include plan-view drawings with vehicle swept paths overlaid on the architectural site plan, turning templates to Austroads standards, and a written assessment of circulation adequacy. Delivered in council-required format.

Parking Layout Design to AS/NZS 2890

Parking layout design in accordance with AS/NZS 2890.1 (Parking Facilities — Off-Street Car Parking) and AS/NZS 2890.2 (Commercial Vehicle Facilities). We review or design car park geometry — bay dimensions, aisle widths, ramp gradients, headroom clearances, and turning radii — and verify compliance with the standard before submission. For basement car parks, we also assess column grid compatibility with parking bay layout to minimise wasted space and improve driver amenity.

Access Assessments & Driveway Design

Assessment of proposed driveway access points against TfNSW and Austroads guidelines — including sight distance analysis (using SIDRA or manual calculation), access spacing from intersections, driveway width and grade, and pedestrian path crossing geometry. For classified road access, we prepare the full Access Proposal documentation required for TfNSW concurrence, including traffic volume data and gap acceptance analysis for the design vehicle turning movement.

Traffic Impact Assessments (TIA)

Full Traffic Impact Assessments for medium- and large-scale developments, prepared in accordance with the TfNSW Guide to Traffic Generating Developments. TIAs include traffic generation estimates using RMS traffic generation guidelines, distribution and assignment of generated trips, intersection capacity analysis for the design year, and an assessment of impacts on the surrounding road network. We calibrate our generation rates against comparable developments and justify deviations from published rates where site data supports it.

Traffic Management Plans (TMP)

Construction-phase Traffic Management Plans for development sites — addressing pedestrian and vehicle access during demolition and construction, truck routes for spoil removal and deliveries, temporary road occupancy requirements, and compliance with council's Construction Traffic Management Plan template. TMPs are required as a condition of consent on most medium and large development applications and must be accepted by council's traffic engineer before the construction certificate is issued.

“A parking layout that passes AS/NZS 2890 on paper but frustrates every driver in practice is not good engineering — it is just good compliance.”

IA Engineering Design Team
AS/NZS 2890
Parking Facilities Standard
Austroads
Road Design Guidelines
TfNSW
Traffic Gen. Guidelines
AutoTURN
Swept Path Analysis

The Engineering

How access assessments actually work

A traffic access assessment begins with establishing the design vehicle — the largest vehicle type that will routinely use the access. For a residential subdivision this may be a large rigid truck for removals; for an industrial estate it may be a B-double semi-trailer. The design vehicle determines turning radii, swept path widths, and the required geometry of the driveway, internal circulation aisles, and loading areas.

Sight distance analysis then determines whether a driver waiting to exit the site can see oncoming traffic in time to make a safe decision. This is governed by the speed of the road, the driver eye height, and any obstructions — fences, vegetation, parked cars, or built structures — within the sight triangle. Where sight distances are deficient, we work with the design team to relocate the access point, remove obstructions, or — where neither is possible — recommend an access management measure such as a left-in-left-out restriction or a traffic island.

All access assessment documentation is prepared in the format required by TfNSW and council — with dimensioned drawings, sight distance calculations, and a written justification that directly addresses the relevant standards and guidelines.

Aerial vehicle movement plan showing entry, exit, and truck turning paths through a commercial site
Traffic management plan in effect with roadwork signage, cones, and detour controls on an urban street

Road Infrastructure

VMPs, swept path analysis, and TfNSW-compliant access design

Standards & Compliance

Every traffic package certified by Registered Professional Engineers

All traffic engineering documents issued by IA Engineering are prepared and certified by Registered Professional Engineers (RPE) in New South Wales. Our documentation is structured to satisfy the technical requirements of TfNSW, NSW councils, and private certifiers — reducing the likelihood of requests for additional information and keeping your development approval on schedule.

AS/NZS 2890.1 Car ParkingAS/NZS 2890.2 Commercial VehiclesAustroads Guide to Road DesignTfNSW Traffic Gen. GuidelinesRMS Guide — Traffic Generating DevelopmentsSIDRA Intersection AnalysisAutoTURN Swept PathsNCC / BCA Compliant

Our Approach

How we work with you

We start every traffic engagement by reviewing the site plan, the council DCP parking rates, any pre-lodgement meeting notes, and the road classification of the site's frontage streets. If the development is likely to trigger TfNSW referral, we identify this early and advise on the level of traffic assessment required — so you are not surprised by a referral condition after lodgement.

Throughout design, we coordinate directly with your architect to review access geometry and parking layouts before they are locked in. An access that looks acceptable on a concept plan frequently fails swept path analysis — discovering this during DA preparation is far better than discovering it during a council review or after the construction certificate has been issued. We flag geometry problems early and propose solutions that work within the architectural intent.

Once documents are submitted, we manage council and TfNSW queries directly — responding to technical questions, attending pre-determination meetings where required, and revising documentation to reflect approved design changes. Our aim is a traffic package that supports, rather than delays, your development approval — from DA lodgement through to construction certificate sign-off.

Designed for Your Site, Accepted by TfNSW

Need traffic engineering for your development?

From Vehicle Movement Plans and AS/NZS 2890 parking layout reviews to full Traffic Impact Assessments, our team delivers traffic engineering that TfNSW and council accept on first submission.

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