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

Table 4.3: Intersection Operation Summary: Diamond Street / Elm Street, Unsignalised
                                          AM Peak Hour                       PM Peak Hour
 Approach                                  95th Queue    Avg. Delay           95th Queue    Avg. Delay
                                   DOS                                DOS
                                               (m)         (sec)                  (m)         (sec)
 2020 Base
 Elm Street (S)                    51%        22m          8 sec      29%        10m          4 sec
 Diamond Street (E)                59%        27m         16 sec      45%        14m         12 sec
 Elm Street (N)                    31%        <1m          2 sec      15%        <1m          2 sec
 Railway Car Park (W)               1%        <1m          9 sec      1%         <1m         10 sec
 2020 With Development
 Elm Street (S)                    51%        22m          7 sec      29%        10m          4 sec
 Diamond Street (E)                61%        29m         18 sec      50%        16m         13 sec
 Elm Street (N)                    31%        <1m          2 sec      15%        <1m          2 sec
 Railway Car Park (W)               1%        <1m         10 sec      1%         <1m         10 sec
 2030 Base
 Elm Street (S)                   113%       309m         78 sec      47%        24m          5 sec
 Diamond Street (E)               193%       361m         283 sec     112%      141m         66 sec
 Elm Street (N)                    42%        1m           2 sec      20%        <1m          2 sec
 Railway Car Park (W)               1%        <1m         11 sec      1%         <1m         11 sec


Clearly with the growth assumptions made within this analysis, the intersection of Diamond Street /
Elm Street exceeds capacity in its current form prior to the year 2030. Indeed, gap acceptance survey
results indicate limited gaps are available with existing conditions.
As mentioned in Section 1.3 of this report, planning is currently being undertaken by the Department of
Transport and Main Roads for upgrade of the Diamond Street / Elm Street intersection, with a concept for
its signalisation released in November 2018. This signalisation concept is shown on Figure 4.13.




www.bmctraffic.com.au                                                                                      12
BMC18169: 6 – 10 Diamond Street, Cooroy
6 December 2018