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 16 I2 - Hofmann Dr / Noosa Civic Access Rd Roundabout – SIDRA Output
                                                             Weekday PM Peak                          Saturday Midday Peak

  Scenario                                                       Critical                                    Critical
                                                                             95%tile                                        95%tile
                                                  Max DOS         Delay                     Max DOS           Delay
                                                                            Queue (m)                                      Queue (m)
                                                                (sec/veh)                                   (sec/veh)
  2022 Survey                                         0.22        10.4         9.5             0.22            10.4            9.3
  2026 Background                                     0.24        10.5         10.0            0.23            10.4           10.0
  2026 With Development                               0.29        10.7         13.3            0.28            10.6           13.0
  2036 Background                                     0.25        10.6         11.0            0.25            10.5           10.9
  2036 With Development                               0.31        10.8         14.7            0.30            10.7           14.3

The results presented in Table 16 indicate that the Hofmann Dr / Noosa Civic Access Rd Roundabout would
operate within acceptable performance thresholds under all assessment scenarios.

8.9.3      I3 - Noosa Civic Access Rd / Unnamed Road Roundabout

The Noosa Civic Access Rd / Unnamed Road Roundabout is a three-leg roundabout. The current intersection
form of the roundabout is shown in Figure 15.

Figure 15 Noosa Civic Access Rd / Unnamed Road Roundabout Form




At the time of undertaking this assessment, the Noosa Civic Access Road / Unnamed Road roundabout was
impacted by construction activities. As a result, a survey count could not be obtained to understand the existing
traffic demands. Given that this roundabout is newly constructed, the travel patterns utilising this roundabout
are not mature. A site inspection was conducted on 9 May 2023 to understand the traffic performance of the
intersection, and according to observations, the roundabout typically experiences low traffic demands presently.
To conservatively assess this roundabout, SLR has applied an estimated 120 traffic movements to the right-turn
traffic from the eastern leg and left-turn traffic from the northern leg as background traffic. It is noted that these
additional traffic movements were not distributed to the external road network and there were no reductions
applied to other study intersections. Traffic volumes assessed for this intersection are included at Appendix D.



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