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Warrego Highway / Jackson - Wandoan Road Intersection Updgrade



Department of Transport and Main Roads


May 2021


Jackson, Queensland

Geleon were engaged by ADG to undertake cost estimating activities for this project which involved the preparation of a Business Case to upgrade the intersection of the Warrego Highway (Miles – Roma) and Jackson – Wandoan Road at Jackson, approximately 85km east of Roma, Queensland.

A number of key deficiencies had been identified impacting on the safety and operational performance of the intersection, in addition to the need to provide access for PBS Level 4A heavy vehicles.

Prepared in accordance with TMR’s Project Cost Estimating Manual, a P50 / P90 Total Project Cost Estimate and associated report were prepared using a combination of unit rates and first principles estimating techniques that determined Construction Contractor's Costs, Principal's Costs, considered Planned and Unplanned Risks, Escalation and utilised @Risk software to perform a Monte Carlo simulation to ascertain the Total Project Cost at 50 and 90-percentile likelihoods.

Estimated costs were then separated into Capex and Opex cost elements in accordance with Section 8 - Work Breakdown Summaries of the Transport Infrastructure Cost Classification Guide for Recording Expenditure - Implementation Guide for the TMR Infrastructure Asset Accounting Policy and Cost Breakdown Structures.

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