JG Afrika developed an Airport Pavement Management System (APMS) for Namibia Airports Company (NAC).
This is the first comprehensive inventory and description of all NAC’s airside paved assets, and a step taken towards the development of a larger Integrated Infrastructure Asset Management System.
It is an ongoing challenge for the NAC to maintain ex-military airports as viable commercial operations without incurring significant upgrading costs, even as they face substantial maintenance backlogs.
To this end, JG Afrika produced a draft Policy and Management of Airport Pavement Maintenance document for NAC. In line with international practice, the document motivates the acceptance of the policy and the continued development and use of the APMS.
This is in addition to a minimum service level classification in line with the Civil Aviation Organisation (ICAO) Aerodrome classification system that provides trigger values and best practice benchmarks for maintenance and rehabilitation for the various airports and their airside elements.
APMS provides NAC with a holistic view of its airside infrastructure to better plan and motivate maintenance.
The report encourages the NAC to reduce the maintenance burden by bringing airside infrastructure in line with the civilian and commercial needs of the airport. This would necessitate “mothballing” specified airside infrastructure, allowing the loss-leader airports to be managed more cost effectively.
The APMS is run using Micro-PAVER software, which features a Geographic Information System (GIS) to provide NAC with the exact location of every element or sub-element of the surfaced areas of the airports.
The Pavement Condition Index rates the condition of the airside infrastructure. The ratings range from “satisfactory”, “fair”, “poor”, “very poor”, “serious” and “failed”.
Furthermore, the APMS provides conceptual cost implications for various maintenance scenarios. These include preventative and conventional maintenance practices, in addition to repair and rehabilitation due to neglect.
The APMS currently uses mainly visual survey information to produce a PCI rating for the entire network, individual airports, or their elements, including the taxiway, runway and apron.
Various instrument surveys have been done on an ad hoc basis in the past or when rehabilitation or upgrades are planned to add to the full picture of the functional as well as structural condition of these airports. These surveys incorporate information pertaining to surface safety, macro texture, skid-resistance and riding quality obtained from these instrument surveys.