132003.221132 (23616DA) - Doonella Estate - Road Traffic Noise Assessment Report

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CONSULTING ENGINEERS,

The road traffic noise levels have been predicted using a computer model developed by ASK
Consulting Engineers, based on the CORTN88 traffic noise prediction method and is approved by the
Department of Main Roads.

5.1 Traffic Noise Modelling Input Data

Road traffic noise level predictions for the Lio(18 hour), maximum Leq(!| hour) daytime and maximum
Leq(| hour) night time assume a 0.5 metre source height. A 1.5 m receptor height is assumed for the
ground floor and 4.5 m for the first floor of the proposed residences, Calculations have been carried
out at allotments on the subject site at a location 6 m from the property boundary nearest to
Beckmans Road.

The receiver heights are relative to current ground levels as provided electronically by PMM Group
Pty Ltd.

The traffic noise calculations have been undertaken in accordance with CORTN88 and except where
indicated a +2.5 dB(A) facade reflection allowance is included in the road traffic noise level
predictions.

The road traffic noise level predictions are based on the traffic data provided by Main Roads and
shown in Table 5.1 below.

The road traffic noise level predictions are based on the traffic data shown in Table 5.1. The traffic
speed shown in Table 5.1 is the sign posted traffic speed adjacent to the subject site. The traffic
speed used in the noise model for the verification (year 2004) case is 80 km/h. This was the sign
posted traffic speed adjacent to noise monitoring Location A.

Table 5.1 Traffic Data

 

 

 

AADT (Vehicles) for the | Percent Heavy Vehicles | Traffic Speed km/hr for
Year for the Year the Year
Road 2004 2014 2004 2014 2004 2014
Beckmans Road 13325 27340 5 5 60 60

 

 

 

 

 

 

 

 

 

The road surface used in the noise model is worn chip seal (up to Smm). This is the existing road
surface adjacent to Location A and the subject site.

The 18 hour traffic flow may be taken to be 94% of the ultimate daily traffic flow.

A traffic growth rate of 7.5% has been used for Beckmans Road. The Department of Main Roads
supplied traffic data for the years 1996 and 2003, the traffic growth rate has been calculated based on
the traffic data obtained in these years.

3052R01V03.doc Proposed Residential Subdivision Beckmans Road, Tewantin Lensworth Lake Doonella Pty Ltd c/- PMM Group Pty Page &

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