Phase 1 Upgrading Works: (Upgrading of existing road from 2-Lanes to 4 Lanes and Service Lanes, Structures, Bridges, etc. including Defect Notification Period)\r\n\r\nPhase 2: Performance Based Maintenance Works\r\n(Maintenance works consisting of all activities to be carried out to achieve and keep the road assets as defined in the PBM Specifications)