Authors developed concrete segment measurement system using CCD cameras, which is set on rotation unit for covering measurement area widely. For photogrammetry system, it is hard that a fixed facility system measure objects outside, because camera sometime changes their position by ground subsidence. But this system measure object accurately by calculating displacement of CCD camera using base point in case of the camera is set on swing unit roughly. And this system measure thickness of concrete deck slab and web plate by a measurement method, which is combined orientation of a single photograph and plane equation of segment section.

View full abstract

The diversion system on urban expressway has been proposed as a measure to dissolve the traffic congestion in city centre. The system can be determined as a method of traffic management with the promotion for detour from congested sections. Firstly, the fundamental concept of diversion system is described. Impact of the diversion system implementation can be evaluated with the stochastic traffic assignment. Secondly, the optimal implementation of diversion system would be discussed with empirical studies. The diversion system on Hanshin Expressway is assumed as a real size network. The genetic algorithm is applied to search the optimal solution of allocation for the diversion system. It would be concluded that the optimal implementation of the diversion system can provide the efficient traffic as a practical traffic management method.

View full abstract

It is an important issue to utilize the resources of numerous traditional topographic maps by alternating to digital data. We propose an efficient and precise means of geometric correction for those topographic maps distorted due to not only elasticity of paper but also due peculiarity of each scanner. The paper consists of two items; i. e. an interactive inputting interface utilizing the coordinates information of each map, and for geometric correction appropriate algorithms responding to each ones. The preciseness of the input data and geometric correction were verified by employing frequency distribution diagrams, and the sufficient results for practical use were given.

View full abstract

We present a new approach for dynamic pricing of infrastructure investment projects with stochastic cash flow streams. In our framework, projects are viewed as options in an incomplete market, whose prices are determined by a stochastic discount factor (SDF) reflecting an option writer/buyer's aversion to “basis risks”. We first formulate a “regularized inverse problem” that estimates a unique arbitrage-free SDF from observed asset prices. We then show that the problem is equivalent to a dynamic risk control (hedging) problem with CARA utility. Our analysis further reveals that ask/bid price of an option significantly depends on the correlation between option pay-off and asset prices traded in security markets.

View full abstract

Evaluation methods such as Cost Benefit Analysis based on demand forecasting have been used conventionally, but it is necessary to come up with a flexible framework of policy evaluation that is more responsive to quality of life of individuals. We develop a methodology of QOLA that can a) measure individual's satisfaction of fundamental five elements, b) quantify the weight of each element and elasticity of substitution among elements, and c) represent QOL as general satisfaction. The weight of each element is endogenously determined depending on satisfaction level and its perception time. As a case study, this methodology is applied to evaluate the impacts of intercity transport infrastructure.

View full abstract

Recently, CVM (Contingent Valuation Method) is widely applied to evaluate non-market goods. But there are still many researchers who have taken a critical stance of the measurement and methodology. So we consider their criticism and examine the reliability of the measurement of non-market goods by CVM, theoretically. And we propose Delphi Technique-CVM, applying the result to CVM. In addition, we implement the CVM questionnaire practically, and examine how reliable Delphi Technique-CVM and CVM are.

View full abstract

Because inter-regional local bus service can reduce bus cost, it will be in service in many regions. With inter-regional local bus service, the municipalities covered by the service jointly subsidize the bus company and the amount of subsidy is allocated to the municipalities. To maintain the feasibility of this joint subsidization, the consensus over the allocation for all municipalities is necessary. However, whether widely used allocation method can contribute to consensus building among the municipalities has not been studied. This paper shows which allocation method is useful in terms of consensus building by use of cooperative game theory.

View full abstract

In this paper, a pre- and re-evaluation model with reference to evaluation costs is formulated to valuate the economic values of projets. Two types of option values, i. e., stopping options and timing options, are explicitly modeled by use of real option theory. The evaluation methodology is presented to determine the optimal timing of implementing new projects and that of scrapping existing projects. The optimal conditions of the model are given by Fredholm integral equations of type II. The solution algorithm to find out the optimal solution is also presented. The paper concludes by illustrating numerical examples to explain the properties of the pre- and re-evaluation systems presented in this paper.

View full abstract

In this paper, a methodology to evaluate cost efficiencies of waste water disposal systems is presented. The waste water disposal systems are modeled as two-level hierarchical systems. The stochastic frontier models hybridizing cost frontiers both of lower subsystems and upper systems are formulated to evaluate cost efficiencies of hierarchical systems as a whole. The case studies are carried out based upon Japanese data set to elucidate the cost efficiencies of the waste water disposal systems operated by local jurisdictions.

View full abstract

In this paper, we aim to analyze road traffic situation and routes of cars between origin and destination under the downpour disaster occurred in the time period for citizens going home in Nagoya city area, September 2000, by using survey data including the routes of cars, travel times and a huge congestion road sections under the disaster. As a result of analysis, we were able to make obvious that the downpour had great influence on transportation networks in the city. And a relation between a heavy rain state and a road situation was able to be clarified by using GIS.

View full abstract

In this paper, we discuss a formulation and solution approach for multilevel single allocation uncapacitated hub location problem (MSAUHLP). We present a quadratic programming formulation for the problem. We also developed an efficient heuristic algorithm using a heuristic model based on GA and TS namely M-GATS to solve the proposed model. We verified and demonstrated the applicability of our method by presenting extensive calculation results based on data given in well known dataset. Our proposed heuristic is very efficient in finding an optimal solution of a large size network (up to 200 nodes) with in a reasonable amount of calculation time.

View full abstract