Traffic Response · MCU15/0122

Table 2: Summary of Sidra Outputs – Eumundi Noosa Road/Goodchap Street Intersection
 Case                         Degree of          Delay (sec)              Highest     95th Percentile Critical Queue (m)
                              Saturation                                  Level of
                                                 Average       Highest*   Service*    South     East     North     West

 2016 AM Current Case         81.9%              12.4          37.0       D          8.7       30.9     97.0       38.2
 2018 AM Base Case            84.5%              13.1          41.6       D          8.9       32.4     108.6      39.4
 2018 AM Project Case         102.3%             24.0          99.9       F          9.9       42.1     272.4      42.5
 2028 AM Base Case            104.3%             25.7          121.4      F          9.6       36.0     294.0      41.1
 2028 AM Project Case         122.0%             48.3          251.0      F          10.0      41.3     609.5      53.7
 2016 PM Current Case         61.1%              8.6           22.2       C          6.5       29.5     46.7       35.1
 2018 PM Base Case            62.9%              8.8           23.4       C          6.7       31.0     49.7       36.3
 2018 PM Project Case         78.2%              11.3          32.2       C          7.5       41.4     84.5       39.0
 2028 PM Base Case            71.6%              10.0          31.6       C          7.2       37.7     67.1       43.7
 2028 PM Project Case         96.6%              18.5          78.0       E          8.4       53.3     193.2      47.0
* Right turn from Goodchap Street in all cases

Table 2 shows that this intersection approaches capacity in the 2018 AM peak with a degree of saturation (DOS) of 84.5%.
With development and further background traffic growth, this intersection is anticipated to exceed available capacity and
result in significant delays and queues for the Goodchap Street approach resulting in a level of service (LOS) F. It is noted
that all other approaches in the 2018 and 2028 AM peak hour scenarios operate with a LOS B and nominal queues.

Table 2 also shows that this intersection operates suitably in the PM peak with the exception of the 2028 project case,
where the DOS exceeds 95%.

TTM have reviewed the layout of the existing intersection and note it may be feasible to reconfigure the Goodchap Street
approach with an all movements lane and dedicated right turn lane. This is considered practical as the predicted through
and left volumes combined are approximately 25% of right turn volumes at this approach in the base scenarios. It may
be possible to make this change with line marking only, with the cycle lane provided left of the all movements lane.
Signage may be required to advise drivers turning left or through this approach to be cautious of cyclists.

The Sidra layout of this arrangement is shown in Figure 5.