Appendix C - Traffic + Carparking - 6-10 Diamond Street Cooroy - 21.12.18

Table 4.4: Intersection Operation Summary: Diamond Street / Elm Street, Upgraded
                                          AM Peak Hour                         PM Peak Hour
 Approach                                  95th Queue    Avg. Delay              95th Queue    Avg. Delay
                                   DOS                                 DOS
                                               (m)         (sec)                     (m)         (sec)
 2030 Base
 Elm Street (S)                    88%       123m         30 sec      88%          123m          30 sec
 Diamond Street (E)                70%        77m         19 sec      72%           80m          19 sec
 Elm Street (N)                    89%       193m         22 sec      89%          193m          22 sec
 2030 With Development
 Elm Street (S)                    59%        81m         15 sec      59%           81m          15 sec
 Diamond Street (E)                35%        30m         13 sec      37%           32m          13 sec
 Elm Street (N)                    58%        67m         19 sec      58%           67m          19 sec


The SIDRA analysis indicates that the proposed signalised intersection is capable of accommodating base
traffic volumes plus traffic generated by the proposed development at the year 2030. Indeed, it indicates
that the development’s impact is minor and is on the non‐critical approach.
As such, it is suggested that the development is not responsible for contributing funding to the upgrade.

4.5        Left‐In / Left‐Out Routing Impacts
Noting that site access movements will be restricted to left‐in / left‐out, and recognising that there are no
U‐turn opportunities within close proximity to the site, the following route options are available:
        Entering Traffic:
         - From the north will turn left from Elm Street into Pearl Street, then utilise Kauri Street to access
            Diamond Street and approach from the east.
         - From the south will turn right from Elm Street into Opal Street, then utilise Kauri Street to
            approach from the east.
        Exiting Traffic to the east will either turn left or right into Elm Street, depending on congestion at
         this intersection and utilise either Pearl Street or Opal Street to return to Diamond Street /
         Tewantin Road via Kauri Street.
It is recognised that the bulk of the development traffic will be generated by the convenience shop. For this
use, if the access is not convenient, these users will simply opt to utilise the other, existing, full‐line
supermarket in Cooroy.




www.bmctraffic.com.au                                                                                           14
BMC18169: 6 – 10 Diamond Street, Cooroy
6 December 2018