Recently the operation of road administration based on performance measurement has been mentioned and there is a rising need for outcome indicators relating to congestion.
In this study, we have tried to analyze the characteristics of data using 20 taxis data operating mainly in the Tokyo wards. In addition, we have derived formulae for three indicators of road performance such as the percentage of time the cars were caught in congestions, traffic jam length and waiting times of signal. We have also estimated performance indicators.
We have shown that this is a highly practical and applicable method that can replace, or improve the efficiency of traditional measurement methods

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The objectives of the study are to model driver's reactive behavior for the information services and mutual behavioral decision processes between vehicles at merging section of urban expressway, to construct integrated evaluation system of traffic flow at merging section by the combination of behavior model and microscopic traffic flow simulation model, and to analyze the effect of information services on the improvement of traffic flow at merging section. Through the simulation, the relation among composition of AHS vehicles, driver's degree of confidence for information contents, and improvement of traffic flow is analyzed.

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In 1990's, domestic transportation service and telecommunication service had been improved. Such improvement in communication technology would greatly influence on business network structure. In this study we formulated the problem that estimates Japan's business network structure based on inter-regional information traffic data. In order to clarify longitudinal changes in headquater branch-office arrangement and branch-office function, the estimation procedure of business network structure model is applied for inter-regional traffic data. The results shows that a number of branch-office is decreased, and the branch-office function to decrease the amount of information sending to headquarter, is weakened.

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Although parking for loading and unloading should be performed outside streets in principle, actually it is difficult to manage parking demand only in off-street loading and unloading facilities, which has become one of the causes of traffic congestion. In order to manage on-street parking for loading and unloading, it is necessary to analyze the characteristics of delivery and collective trucks behavior during the parking duration. This research analyzes the characteristics of delivery and collective trucks behavior, which can be regarded as a chain that consists of the activities of loading and unloading and the trips between a parking location and the visiting site. Addition to this, this research explains how to determine the catchment area of a loading zone which is a parking facility for delivery and collective trucks.

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This research constructs a three-region interregional input-output model by dividing the whole country into three regions with the concept of hierarchical structure. When the demand increases or decreases in specific regions, its economic effects are often expected to be analyzed using the three-region interregional input-output model: the small region concerned, middle region and large region surrounding the region. The model suggested in this research can meet such demands, thus it can be widely used.

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A new highway design approach is proposed, which optimazes horizontal and vertical alignments simultaneously based on Genetic Algorithms (GAs). A new alignment model suitable for optimization problem is devised to solve a large-scale problem. Qualitative evaluation of construction cost is calculated from detailed digital terrain data. The alignments should satisfy tens of constraints and preferable conditions defined as Japanese highway standards for running salty. We developed the GAs based optimization system called ‘OHPASS’ Optimal Highway Path Automatic Search System.

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The purpose of this paper is to extract the buildings distributed in the broad area when an existing raster map is converted into a digital map, and to rectify their vector chains, automatically. The problem is in the map that natural objects, artificial objects, and signs with various geometries crowd and exist together, as a result they comes in contact and overlaps, and in some cases they are divided into some parts. We pay attention to the characteristics of a loop, straight lines, right-angled and size of a building, and the loops of buildings are detected in accordance with their peculiar geometrical feature and then they are rectified.

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The smart growth movement has gained momentum in the United States as the weight of a car-dependent society increasingly takes its toll. Key traits of smart growth are visioning, harmonious urban form and function, strategic infrastructure investments, and economic resourcefulness. In the United States, barriers that continue to inhibit this movement include gross mis-pricing of automobility, spatial mismatches, and institutional fragmentation. Among the most promising initiatives for promoting smart growth are regional land-use management, adaptive re-use and redevelopment, and telematics. To diffuse opposition, smart growth needs to be expand free-market choices.

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The purpose of this study was to understand the principles of the design of Shimo-Semba District in the castle town of Osaka. In the study, using modem surveying maps: 1) modules of the construction of waterways, 2) the size of blocks and building lots, 3) the relationship between waterways and main streets, and 4) the sewerage systems were analyzed, considering the effect of topography. As a result, the study has shown that waterways were firstly built at the lowest place and that had priority over other considerations of placement of infrastructure. Also, the study has clarified that the waterways had been designed with open spaces, streets and building lots along them. In addition, the study has explained that the process of the development in Shimo-Semba District, arranging design units between waterways chronologically.

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The purpose of this work is establishing the historical review of buttress dams in the modemized era in Japan, making free use of technical papers and textbooks of those days. This type of dams was introduced in this country as the reservoir of the city water supply, also as the intermediate regulating reservoir of the conduit type hydraulic plant in the first stage. Although the reliability for the type was increased after the establishment of the earthquake-resistant design proposed by Dr. Momonobe; in a short time, the buttress type became unpopular. In this paper, how this type of dams was accepted in Japan and evaded soon after, is tried to analyze and clarify.

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In the driver's course inference models which authors developed, three points play the important role. They are the cognitive distance of drivers to the real route distance, the mechanism by which drivers select the turning point based on memories concerning the cognitive distances between two turning points and shape of routes, and the selection probability of the direction in straying. These characteristics of drivers are indispensable to construct a realistic course inference model. Then, in this research three kinds of indoor experiments were conducted with a simulator, and driver's some probabilistic characteristics were clarified by analyzing the result.

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