Appendix E- Traffic Impact Statement · MCU23/0078

    Stockwell Development Group Pty Ltd                                              SLR Ref No: 620.30926-R01-v1.0 TIA 20230524.docx
    Traffic Impact Assessment                                                                                               May 2023
    Proposed Noosa Civic Village Mixed Use Development




Table 10 Calibrated Traffic Generation for Expansion GLA
                                                                     Thursday PM                         Saturday Midday
             Scenario                  Yield (GLA)
                                                            Trip Rate              Trips            Trip Rate               Trips
             Existing                31,670 m2 GLA       4.98 vph / 100m2      1,577 vph        7.02 vph / 100m2         2,223 vph
                                                2                          2                                       2
            Proposed                 49,960 m GLA        3.94 vph / 100m       1,968 vph        5.80 vph / 100m          2,898 vph
            Net Change              + 18,290 m2 GLA              -             + 477 vph                 -               +701 vph

The adopted rates identified through the site-specific assessment were then benchmarked against the rates
detailed in the Guide to Traffic Generating Development Updated Traffic Survey (RMS GTGD) prepared by NSW
Roads and Maritime Services (RMS). The benchmarking exercise established that the adopted rates were similar
to those suggested within the RMS guideline:
             The adopted figure of 3.94 vph / 100m2 is slightly lower than the rate of 4.4 vph / 100m2 suggested by
              the RMS guideline for the Thursday PM peak.
             The adopted figure of 5.80 vph / 100m2 is slightly higher than the rate of 5.5 vph / 100m2 suggested by
              the RMS guideline for the Saturday midday peak.
Therefore, in balance, the adoption of the above assumptions is considered to be reasonable.

8.5.2         Retail (Shopping Centre) Use Drop-in Trips

When considering trips generated by the development, it is important to consider that not all trips are new to
the local road network. Traffic that already exists on the road network should be discounted to account for the
‘drop-in’ component, which is detailed in below:
             Diverted drop-in trips: Traffic travelling on the surrounding road network unrelated to the Noosa
              Village Mixed-Use Precinct, that divert and modify their travel route to visit as they pass by; and
             Undiverted drop-in trips: Traffic travelling with the original intention of visiting the existing Noosa Civic
              shopping centre, instead continue through to visit the Noosa Village Mixed-Use precinct.

SLR applied a generic discount to simplify consideration of the above factors. According to Table C8.2 of
Austroads’ Guide to Traffic Generating Developments (2020), a shopping centre with greater than 20,000m2
consists of a segmentation of traffic generation of 63% new trips, 18% diverted drop-in trips and 19% undiverted
drop-in trips. Considering that the retail development of the Project will share an internal pedestrian pathway
with the existing Noosa Civic shopping centre, applying a 40% drop-in rate, accounting for both diverted and
undiverted drop-in trips, for a combined shopping centre area (GLA) of 49,960m2 is appropriate.

8.5.3         Other Land Uses New Trips

For development uses other than retail (shopping centre), the following sources have been reviewed to obtain
traffic generation data:
             QLD Government’s Traffic Generation Data 2006-2019 (QLD Open Data)1;
             Roads and Traffic Authority’s (RTA) Guide to Traffic Generating Developments Version 2.2 2002 (GTGD
              2002); and


1
    Open data portal source: https://www.data.qld.gov.au/dataset/traffic-generation-data-2006-2019


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