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Lismore to Mullumbimby Electricity Network ... - Essential Energy

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ENVIRONMENTAL RESOURCES MANAGEMENT AUSTRALIA DOCUMENT NO. 0051706 TRAFFIC MANAGEMENT/FINAL/28 MAY 2010<br />

62<br />

Environmental Issue Management Strategy Responsibility Sub Plan/CE<br />

Procedure<br />

Safety of Road Users<br />

and Construction<br />

Staff<br />

Assessing Traffic Flow<br />

The average daily traffic (ADT) is a measure of the vehicles travelling along a section of<br />

road on a daily basis. The ADT must be determined <strong>to</strong> be able <strong>to</strong> select the correct<br />

Traffic Control Plan (TCP) for the worksite. The TCP that is chosen must be able <strong>to</strong><br />

address the greatest traffic volume likely <strong>to</strong> be encountered. Annual Average Daily<br />

Traffic (AADT) Data is usually available for main roads from local Councils.<br />

Where the AADT is unavailable the following formula has been developed <strong>to</strong> provide<br />

an estimate of the ADT. Over the course of five minutes, all vehicles travelling in both<br />

directions are counted. The number of vehicles counted after the five minutes is then<br />

multiplied by 12 (<strong>to</strong> provide the estimated number of vehicles/hour). This number is<br />

then multiplied by 16 <strong>to</strong> provide the estimated ADT. The reasoning behind the<br />

multiplication fac<strong>to</strong>r of 16 is that, in practice, most traffic is generated within the 16<br />

hour period between 6.00am and 10.00pm.<br />

Average Daily Traffic Formula<br />

Estimated ADT =<br />

Number of<br />

vehicles<br />

counted in 5<br />

minutes<br />

(travelling in<br />

both directions)<br />

x 192<br />

(conversion fac<strong>to</strong>r<br />

of 12 <strong>to</strong> get vehicles<br />

per hour multiplied<br />

by 16 hours for<br />

vehicles per day)<br />

Works Coordina<strong>to</strong>r<br />

CEM2328 Traffic<br />

Control: Safety

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