ATTCH 6 - IR Response - Traffic (TTM)

9 November 2017
Our Ref: 17BRT0208
Your Ref: RAL 17/0501



Attention: Lisa Pienaar
Noosa Council
PO Box 141
Tewantin Qld 4565


RE:       2 David Low Way Castaways Beach, Residential Subdivision

          Response to Council RFI Dated 7 September 2017



TTM consulting has been engaged to respond to three (3) specific traffic issues raised in a Noosa Council
request for information dated the 7th of September 2017. The issues addressed here are those numbered
13, 14 and 16 in the RFI.



13.     Assess and achieve Safe Intersection Sight Distance requirements at the proposed driveway as defined by
        the Austroads guidelines, consistent with the requirements of Section 3.10 of PSP5, based on the design
        speed of David Low Way determined from a speed survey.

It should be noted that the existing approval for a two-lot subdivision did not attract any conditions relating
to upgrade of the access intersection, whereas the current proposal for a six-lot subdivision, which will
generate just 4 additional vehicle trips in the peak hour, is proposing a significantly safer arrangement at the
site access intersection. Not only are turn treatments to be provided on David Low Way both approaches to
the access intersection, but SISD will be increased significantly, as discussed below.

In response to the Council RFI, TTM has reassessed the sight distance at the access driveway intersection
based on Austroads Extended Design Domain (EDD) requirements for sight distance at property entrances
(Austroads Section 3.4 and Appendix A).

EDD is considered acceptable in this instance as the access driveway intersection satisfies the criteria that it
relates to a) a new intersection that must be installed on an existing road, and b) it is impractical to achieve




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