Traffic Impact Statement

                                                                                                                      51 Elanda Street TIS
                                                                                                                                  2024-11-25



3.2.2           Signal Control Impact on vehicle Queueing
Whilst priority will be given to entering vehicles, sufficient queuing area will need to be provided to
accommodate a vehicle at Ground Level should it be required to give way to a vehicle that has already begun
to egress the site. The proposal provides a 6m long queuing area by means of a hold bay. 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. Additionally, it
should be noted that the queuing requirements specified in Table 3.3 of ‘AS2890.1’ primarily relate to the
requirements at short-stay car parking facilities (e.g. city centre parking, parking stations, hospital and medical
centres) and its application in this instance is not considered appropriate. The purpose of queuing provisions is
to ensure that any queuing generated by internal development traffic operations, such as vehicles stopped
waiting for the car lift, are contained within the subject site. Such that there is minimal impact on the external
road impact.


A Poisson distribution queueing analysis have been conducted to determine the impact which the proposed
signal control and car stacker operations would have on vehicle queueing at ground level and within the
basement. The proposed development would have a peak hour generation of 3.3 vehicles during both AM and
PM peak hours. This would entail:
      •     AM Peak: 1 inbound and 3 outbound
      •     PM Peak: 3 inbound and 1 outbound
      •     Total cycle time (ramp and furthest car bay): 40 seconds


The vehicle queueing analysis results (based on worst-case PM peak volumes) are provided in Table 3.2.

Table 3.2            Vehicle Queueing Analysis Results

                                  Queue Length Analyses (M/M/1 Queue): Access AM and PM Peak Hour

                               Sourced from: 'Austroads Guide to Traffic Management Part 2: Traffic Theory'

                                                             Variable Inputs

Unit of time                                                            hour

Arrival rate                                                             3                                    vehicles per hour
Service rate                                                            90                                    vehicles per hour
Number of gates                                                          1                                         gates
Queue distance per vehicle                                               6                                         metres

                                                                 Outputs
Direct outputs from inputs

Mean time between arrivals                                            0.333                                         hour

Mean time per service                                                   0.0                                         hour
Traffic intensity                                                       0.03



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