Appendix K - Traffic Engineering Report · MCU21/0146

6           Site Access Arrangements
6.1         Proposed Access Arrangement
It is proposed that vehicular access for the development will be provided via a 6.2m wide modified Type B
driveway crosser onto Hofmann Drive. NSC revert to the standard drawings published by the Institute of Public
Works Engineering Australia, Queensland (IPWEAQ) for crossover design. In regards to other key access
parameters not specified in the Noosa Council Plan 2020 ‘Driveways and Parking Code’, AS2890.1 and
AS2890.2 have been referred too.

Table 6.1: Design Characteristics for the Driveway Crossover
 Design Aspect                     NSC & AS2890.1 Requirement      Proposed Provision       Compliance
 Crossover Width                   Type B: 6.0 – 9.0m              6.2m                     Compliant
 Minimum Intersection              6m from tangent point of kerb   >6m                      Compliant
 Separation
 Sight Distance                    Ideally 83m, minimum 65m        > 83m                    Compliant
 Pedestrian Visibility Splays      2m x 2.5m on exit side          2m x 2.5m on exit side   Compliant
 Entry Queue Capacity              24m (4 cars)                    6m (1 cars)              Performance Solution
 Gradient of first 6m              1:20 (5%)                       1:20 (5%)                Compliant
The development proposal generally complies with the IPWEA and AS2890 requirements; however, the
following aspects of the access design have been resolved with alternative solutions:

Driveway form

To ensure pedestrian crossing distances are kept to a minimum the entry splay of the proposed access has
been designed below the standard of Type B Heavy Duty Vehicle crossing. The entry splay exceeds the
requirements for residential vehicles in accordance with the IPWEA standard drawings and can
accommodate the entry manoeuvre of a Waste Collection Vehicle (WCV) entering the development as
illustrated in TTM Standard Drawing 20BRT0372-01 included in Appendix B.

The exiting splay is designed in accordance with a Type B Heavy Duty Vehicle crossing.

Queuing

The proposal provides a minimum 1 vehicle queuing prior to the first conflict point of the visitor parking. This
is 3 vehicles below the requirements under AS2890.1 requirements. It should be noted that the queuing
provision requirements outlined in AS2890.1 are based on the number of carparks and does not take into
account the land use or development traffic generation/ space turnover.

As detailed in Section 5, it is expected that the peak vehicle movements into/out of the site will be 48vph
during the peak-hour periods. The probability (using the Poisson distribution method) of more than 1 vehicle
entering the site at the same time (or say within a 30 second period whilst a car is manoeuvring in/out of the
first visitor parking space) and all requiring to queue in advance of the first internal conflict point, extending
back onto Hofmann Drive, is less than 1%. As such, the proposed internal queuing capacity of 1 vehicle is
sufficient to cater for the 99th percentile entry queue of the site and is therefore considered acceptable.


Site: 17-19 Hofmann Drive, Noosaville                                                                              16
Reference: 20BRT0372