PNG: Ex-Ante Greenhouse Gas (GHG) Assessment, Trans-National Highway

PNG: Ex-Ante Greenhouse Gas (GHG) Assessment, Trans-National Highway Please note that the deadline is based on Korean Standard Time Zone (KST, UTC+9) INTRODUCTION TO GGGI The Global Green Growth Institute (GGGI) is a treaty-based international, inter-governmental organization dedicated to supporting and promoting strong, inclusive and sustainable economic growth in developing countries and emerging economies. To learn more please visitabout GGGIweb page. ## Project background Papua New Guinea (PNG) is among the countries most vulnerable to the impacts of climate change. Its road network is a lifeline for economic growth, social connectivity and access to essential services, and it is increasingly compromised by intense rainfall, flooding, landslides and related hazards. The heavy rains of 2024 alone caused damages estimated at PGK 500 million (approximately USD 125 million).With funding from the Australian Department of Foreign Affairs and Trade (DFAT), GGGI is implementing the Climate Finance Initiative for Resilience and a Sustainable Transition (Climate FIRST), developed under the PNG–Australia Climate Change Action Plan (PACCAP), in close collaboration with the Climate Change and Development Authority (CCDA).Under Climate FIRST, GGGI is supporting the PNG Department of Works and Highways (DoWH) to prepare a climate-resilient road investment in Morobe Province (the Trans-National Highway 9 Mile to Bulolo Resilient Road  Project) for potential financing by the Asian Infrastructure Investment Bank (AIIB). To make the best use of resources, the work concentrates on a selected first section of approximately 25-45 km, agreed in consultation with DoWH and AIIB, to be prepared to the required standard by December 2026 as a model for the rest of the corridor.All deliverables under this assignment are intended for DoWH and AIIB. The governing technical and safeguard context is therefore the AIIB Environmental and Social Framework (ESF, June 2024), the AIIB Procurement Policy (as revised through June 26, 2024) read with the Directive on Procurement Instructions for Recipients (July 26, 2024), the DoWH Climate Change Risk and Vulnerability Assessment (CCRVA) Framework (May 2025) and its Guidelines, and the DoWH Climate-Responsive Manuals 1–5 (Design; Construction; Maintenance; Operations; Rehabilitation and Decommissioning). GGGI procurement and contracting processes follow GGGI rules and templates.A central mandate of this work is capacity building: GGGI teams work alongside DoWH, Conservation and Environment Protection Authority, CCDA and the PNG National Weather Service (PNGNWS), so that lasting technical capability remains within PNG institutions after the project ends. ## Objectives of the assignment GGGI seeks to engage a competent consultant (hereinafter referred to as the “Consultant/Service Provider”) to undertake an ex-ante greenhouse gas (GHG) assessment of the selected road section of the Trans-National Highway 9 Mile -Bulolo Resilient Road Project. The assignment will quantify the project’s gross and relative GHG emissions in accordance with the methodology agreed with AIIB and provide transparent, traceable, and reproducible results for AIIB project appraisal. Building on the GHG assessment results, the assignment also includes a pre-feasibility assessment of the project’s potential to access carbon market finance (Task 4).The GHG assessment (Tasks 1–3) is expected to be completed within 1 month (30 calendar days) from the time of contract signing, tentatively during November 2026, including review and necessary revisions, subject to timely availability of the required traffic, design, cost, and construction quantity inputs. The carbon market pre-feasibility assessment (Task 4) shall be completed within 90 calendar days of contract signing, within the overall contract duration. The methodological basis shall apply the IFI Harmonized Framework and the IFI Joint Approach for the Transport Sector, supplemented by the AIIB GHG Accounting Guidance for Investment Projects. The assessment period shall cover the construction period plus 20 years of operation. ## Deliverables and Payment schedule Scope of Work Task 1 – Methodology, scenarios, and assessment boundary - Prepare a concise methodology note in collaboration with relevant project team members, applying the agreed upon methodological basis and identifying the specific guidelines, tools, and emissions factors used. - Identify and describe the most plausible baseline (without-project) scenario and with-project scenario, including the key GHG emission sources for each. - Define the assessment boundary, key assumptions and parameters, and GHG gases considered, and justify any material exclusions. - Complete the relevant methodological and project-characterization sections of the AIIB GHG assessment summary template (see Annex I below) with reference to the interim economic analysis parameters where applicable. - Ensure that the baseline scenario, assessment boundaries, and key assumptions are consistent with the interim economic analysis; where any difference is necessary, clearly explain and justify the difference. Task 2 – Ex-ante GHG emissions calculations - Calculate GHG emissions for the construction period and 20-year operational period, including both gross and relative emissions in accordance with internationally recognized principles and methodologies, with gross emissions disaggregated by Scope 1, Scope 2, Scope 3 and removals in line with the AIIB GHG assessment summary template, and non-CO2 gases converted to CO2e using GWP values from a clearly identified IPCC source. - Cover material construction-phase emission sources, including embodied emissions from construction materials, construction plant/equipment, and relevant land-use change. - Assess and include operational emissions, including traffic emissions under baseline (without-project) and with-project scenarios, accounting for diverted and induced traffic consistent with the traffic forecasts used in the economic analysis, and relevant maintenance-related emissions over the assessment period. - Present the full calculations in a transparent, consistent, and traceable manner that enables reproduction of the results using the same set of input values. - Document key assumptions and data uncertainties, apply conservative assumptions where data are limited, and test the sensitivity of the results to the main drivers (e.g., traffic growth rates and emissions factors). Task 3 – Results, reporting, and AIIB coordination - Prepare a transparent and reproducible Excel model and accompanying GHG assessment report in accordance with AIIB’s reporting requirements, including gross, baseline, and relative emissions, other consequential emissions (OCEs) where applicable, and year-by-year values over the assessment period together with average annual values (tCO2e/year) for comparison against AIIB’s significance threshold for GHG reporting. - Finalize the AIIB GHG assessment summary template with the assessment results and submit it together with the GHG assessment report and supporting calculations. - Coordinate and participate, as required, in discussions with the GGGI project team, DoWH, AIIB, and relevant consultants or specialists undertaking related project preparation assignments. - Respond to review comments from GGGI, DoWH, and AIIB in a timely manner, revise the assessment accordingly, and submit the final outputs (AIIB project summary template, reproducible Excel model, and GHG assessment report) within the contract period. Task 4 – Pre-feasibility assessment for Carbon Market trading - Review any applicable domestic PNG carbon market requirements, including the Climate Change (Management) (Carbon Markets) Regulation 2025, identifying the permits, carbon-rights arrangements, registration, stakeholder and benefit-sharing requirements, and any authorization or accounting considerations relevant to the proposed carbon