Integration of Preventive Maintenance in the Pavement Preservation Program: Ontario Experience
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Résumé
Traditional pavement preservation (PP) practices have mainly focused on corrective maintenance activities. However, with the constant demands on highway networks and the extensive costs required for rehabilitation, highway agencies have started to adopt preventive maintenance (PM) strategies into their PP programs. PM is a set of activities performed while the pavement is still in a good or fair condition to inhibit progressive failure and therefore extend the service life of the pavement. Potentially, PM can enhance pavement performance and reduce the life-cycle costs of highway facilities. The Ministry of Transportation of Ontario (MTO) has been one of the pioneering agencies in applying pavement management system (PMS) analysis tools to its annual pavement maintenance and rehabilitation (M&R) program at the network level. Currently, MTO is in the process of implementing a PP program that includes PM as a key component. In this program, a practical PM model is developed through a set of dedicated decision trees (DT). This determines the feasible maintenance activities for each pavement section based on a number of factors, including existing pavement surface layer, condition, age, and traffic. The PM work program is finalized through budget optimization to determine the most cost-effective maintenance activity for each candidate section. The impact of the PM activities on the overall pavement performance is modeled as an immediate improvement in the pavement condition index and/or a slower rate of deterioration, depending on the nature of the PM activity. This impact is then accounted for and integrated with pavement rehabilitation analysis during the course of development of the final work program for the entire highway network. Budget analysis is performed to determine the impact of incorporating the PM activities into the PP program as compared to a PP program that includes rehabilitation activities only. Analyses results showed that under the same budget scenarios, incorporating PM into the overall PP program resulted in a significant improvement to the network condition. In this paper, an overview of the MTO PP program, with special emphasis on the integration of the PM program into the PMS, is presented. The development of PM DTs and performance modeling is discussed in detail. In addition, budget scenario analyses comparing the use of PM and M&R activities, as opposed to M&R activities only, in the development of the final work program, are presented.
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| Catégorie | Codex | Gemma |
|---|---|---|
| Métarecherche | 0,001 | 0,000 |
| Méta-épidémiologie (sens strict) | 0,000 | 0,000 |
| Méta-épidémiologie (sens large) | 0,000 | 0,000 |
| Bibliométrie | 0,000 | 0,000 |
| Études des sciences et des technologies | 0,000 | 0,000 |
| Communication savante | 0,000 | 0,000 |
| Science ouverte | 0,000 | 0,000 |
| Intégrité de la recherche | 0,000 | 0,000 |
| Charge utile insuffisante (le modèle a refusé de juger) | 0,000 | 0,000 |
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