Browsing by Author "Mturi, Matiko S."

Now showing 1 - 3 of 3
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    Management of Pavement Network Maintenance and Rehabilitation Planning Using Shuffled Complex Evolution
    (2007) Mturi, Matiko S.; Shibayama, Tomoya
    This paper presents an approach for optimization of segment-linked maintenance and rehabilitation plan for a pavement network by using shuffled complex evolution. It extends the works of Nunuo and Agyei (2000) by improving the exploration-exploitation balance of the algorithm and by using a realistic pavement deterioration model to solve the problem of multiple maintenance and rehabilitation activities. An example to maximize the serviceability of the road network under a fixed budget and minimum serviceability level policy is also presented. The result of the optimization process using a part of Kanagawa prefecture road network showed very good results with reasonable computational times.
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    Pavement Rehabilitation Management: Performance Modeling and Rehabilitation Programming
    (2007-09) Mturi, Matiko S.
    Damage to the pavement begins from the first day of utilization; thus, timely and suitable maintenance rehabilitation are required to prevent substantial pavement damage and premature loss. Pavement management systems are used to developing efficient policies to monitor, maintain and rehabilitate deteriorating pavements. These systems consist of pavement inventory and condition information, pavement performance models, and pavement maintenanca and rehabilitation optimal programmes. This paper develops a pavement performance model, and the maintenance and rehabilitation optimal programme at a network level. The performance model is a non-linear empirical whose parameters are estimated from in-service pavement data. The shuffled complex evolution method is used to develop the optimum programming of the maintenance and rehabilitation at a network level. In both cases, the Kanagawa prefecture road network inventory and condition survey data were used.
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    Proposal of Simple Pavement Deterioration Model by Using In-Service Survey Data
    (2007-07) Mturi, Matiko S.; Shibayama, Tomoya
    In this paper a nonlinear deterministic flexible pavement performance model is presented. The model uses the maintenance control index calculated from in-service condition survey data as its independent variable, and pavement characteristics of initial condition, structure and traffic loading as its dependent or explanatory variables. The parameters of the model are estimated using Kanagawa Prefecture Road Network condition survey data. The results of the model show that the model reproduces correctly the actual in-service pavement deterioration trend. This model is simple in its expression, uses a simple estimation method, and uses readily available data, consequently reducing the cost of model estimation. It therefore, suggests a promising avenue for improving the pavement performance prediction and consequently the pavement management system.