| Summary: | The significant impact of infrastructure projects on the environment has created needs to assess its sustainability and responsiveness which indirectly respond to carbon emission reduction. A rating system is widely utilized as a tool to analyze the sustainability of buildings or infrastructures. Malaysia is one of the advanced nations which applies in road green rating system, whereby two rating systems for roads are established; MyGHI for highways and pHJKR (Roads) for non-tolled roads. Preliminary study on pHJKR (Roads) identified that this rating tool assesses road sustainability performance only at planning, design & construction stages. Since the establishment of pHJKR (Roads), no re-assessment has been carried out after the roads begin to operate. Whilst in sustainability resiliency, it is important to sustain its engineering and enhance its performance and services including carbon assessment, under operation and maintenance (O&M) of roads. This paper highlights the methodology of development for assessment criteria and elements during the operation and maintenance phase. The methodology leads to proposed score development which later will be used in association to index indicator for O&M pHJKR (Roads). The data for this study is gathered and analyzed from a comprehensive review of current pHJKR (Roads) with a comparison made to national and cross-nation green road rating index. An expert panel discussion will also be utilized as a method of verification in order to identify suitable sustainability factors during O&M. The outcome of the study will be proposed for the enhancement of pHJKR (Roads) with assessment criteria for operation and maintenance phase and eventually leads to the establishment of multiple life cycle phases for pHJKR (Roads). © 2019 IOP Publishing Ltd. All rights reserved.
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