Response to Information Request 10-6-2025 Traffic impact assessment · OPW25/0042

Table 3-1: Summary of Sidra Outputs (Noosa Drive and Coral Tree Avenue Roundabout)

 Scenario               DOS     Average Delay                              LOS                  95th Percentile Critical
                                                                                                Queue (m)
                                Overal           Worst Movement            Overall    Worst     Noosa       Coral      Noosa
                                  l                                                  Movement   Drive       Tree       Dr (W)
                                                                                                 (E)       Ave (N)
 Weekday - AM Peak Hour

 2022 Survey            32%       5 sec       14 sec (UT Noosa Dr W)         A          B        18 m        2m            18 m
 2025 Base              33%       5 sec       14 sec (UT Noosa Dr W)         A          B        19 m        2m            18 m
 2025 Base +            34%       5 sec       14 sec (UT Noosa Dr W)         A          B        19 m        2m            19 m
 Earthworks
 Weekday - PM Peak Hour

 2022 Survey            42%       5 sec       12 sec (UT Noosa Dr W)         A          B        29 m        1m            18 m
 2025 Base              43%       5 sec       12 sec (UT Noosa Dr W)         A          B        31 m        1m            19 m
 2025 Base +            44%       5 sec       12 sec (UT Noosa Dr W)         A          B        31 m        1m            19 m
 Earthworks
 Weekend – PM Peak
 2022 Survey            40%       5 sec     12 sec (RT Coral Tree Ave N)     A          B        22 m        1m            23 m
 2025 Base              41%       5 sec     13 sec (RT Coral Tree Ave N)     A          B        24 m        1m            24 m
 2025 Base +            42%       5 sec     13 sec (RT Coral Tree Ave N)     A          B        24 m        1m            24 m
 Earthworks
RT – Right Turn Movement, Th – Through Movement, LT – Left Turn Movement, UT – U Turn Movement; N – North, S – South, E –
East, W – West

The analysis indicates that the roundabout is expected to operate at suitable levels at the during the 2025
assessment year, with earthworks traffic included, with a worst-case DOS 44% (less than 85%, practical
capacity limit of roundabout) and overall LOS A. The addition of the Bulk Earthworks traffic has no notable
impact to key operational metrics, with minor change to average intersection delay and at most an increase
in queuing of 1 m (less than 1 vehicle length – approx. 6.0m).

Based on this SIDRA capacity assessment, the proposed Bulk Earthworks traffic generation is considered to
have negligible impact on the operations of the Noosa Drive / Coral Tree Avenue roundabout intersection.

          Analysis of Grant Street / Noosa Drive / Sunshine Beach Road

Figure 3-2 overleaf shows the configuration of the Grant Street / Noosa Drive / Sunshine Beach Road
roundabout intersection adopted in the SIDRA analysis. All default SIDRA inputs were used for the analysis.




Site: 3-7 Serenity Close, Noosa – Proposed Resort Complex
Reference: 22BRT0122