Overall assessment on flexible pavement maintenance activities along North South Expressway Northern Region: From Alor Setar KM51.40 to Sungai Petani KM 107.90

The purpose of this study is to establish the complete assessment of flexible pavement maintenance activities carried out from Sungai Petani KM107.90 to Alor Setar KM51.40, Section N2,North South Expressway Northern Region. The assessment includes the visual inspection to determine the rating criteria for each defect found on the flexible pavement and the determination of proper rehabilitation work along Section N2 by referring to Inspection Manual for Pavement Maintenance Management System – PLUS Bhd and OPUS NMM NRO and Buku Panduan Pemeriksaan Penyelenggaraan Bulanan Lebuhraya-Lembaga Lebuhraya Malaysia (LLM). Quality Assurance and Quality Control (QA/QC) practice also been incorporated throughout the assessment as listed in Method Statement in Work Order and Standard Specification for Road Works JKR/SPJ/2008-S4 Fexible Pavement. It is including before, during and after rehabilitation work is implemented. From the visual inspection, cracking recorded the highest percentage of the defect found on north bound with 32%, while south bound recorded as 44%. Both are categorized in rating C condition which require repairs for user comfort which mill and pave method been chosen for repairing works after considering several factors; such as optimum time and cost. A good assessment at defected area will increase the life span of the pavement and minimize the overall maintenance cost.