Further Advice Response 17-07-25 22BRT0122_LT01_3 · OPW25/0042

3.3.1     Analysis Results

The results of the SIDRA analysis for the 2022 Existing, 2025 Base and 2025 Base + Development scenarios
(both weekdays and weekend) are summarised in Table 3-3 overleaf. Detailed SIDRA output data is also
included in Attachment C – SIDRA Outputs.

Table 3-3: Summary of SIDRA Outputs (Grant Street / Noosa Drive / Sunshine Beach Road Roundabout)
 Scenario           DoS     Average Delay                           LoS                  95th Percentile Critical Queue (m)

                            Overall     Worst Movement              Overall   Worst      Sunshine   Noosa    Grant    Noosa
                                                                              Movement   Beach      Dr (E)   St (N)   Dr
                                                                                         Rd (S)                       (W)
 Weekday - AM Peak Hour

 2022 Survey        30%       9 sec        18 sec (RT Grant St N)     A          B         16 m      12 m     6m       12 m
 2025 Base          32%       9 sec        19 sec (UT Grant St N)     A          B         17 m      12 m     6m       13 m
 2025 Base +        32%       9 sec        19 sec (UT Grant St N)     A          B         17 m      12 m     7m       13 m
 Earthworks
 Weekday - PM Peak Hour

 2022 Survey        40%       9 sec        20 sec (UT Grant St N)     A          B         20 m      24 m     6m       16 m
 2025 Base          42%       9 sec        21 sec (UT Grant St N)     A          B         21 m      25 m     6m       16 m
 2025 Base +        43%       9 sec        21 sec (UT Grant St N)     A          B         22 m      26 m     7m       16 m
 Earthworks
 Weekend – PM Peak
 2022 Survey        32%       8 sec        19 sec (UT Grant St N)     A          B         17 m      17 m     3m       14 m
 2025 Base          33%       8 sec        20 sec (UT Grant St N)     A          B         18 m      18 m     3m       15 m
 2025 Base +        33%       8 sec        20 sec (UT Grant St N)     A          B         18 m      18 m     3m       15 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 2025 assessment
year, with Earthworks traffic included, with a worst-case DoS 43% (less than 85% - practical capacity limit of
roundabout) and an overall LoS A. The addition of the 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 one vehicle length - approx. 6.0m).

Based on this assessment, the proposed Bulk Earthworks traffic generation is considered to have negligible
impact on the operations of the Grant Street / Noosa Drive / Sunshine Beach Road roundabout intersection.

          Analysis of Grant Street / Banksia Avenue

Ultimately, access to the subject development will be achieved with the addition of a fourth (western) leg to
the existing Grant Street / Banksia Avenue roundabout intersection.


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