in the last few years, public awareness has been on the increase about short- and long-term effects of forest roads construction on the environment. therefore, forest road managers have to be concerned about the negative impacts and mitigate them as much as possible. this research conducted multi-criteria analysis techniques in a useful way to define the effective criteria and propose a model f...

Computing shortest distances is one of the fundamental problems on graphs, and remains a challenging task today. Distance landmarks have been recently studied for shortest distance queries with an auxiliary data structure, referred to as landmark covers. This paper studies how to apply distance landmarks for fast exact shortest distance query answering on large road graphs. However, the direct ...

Cluster analysis is a fundamental challenge in trajectory mining. However, existing trajectory clustering algorithms are not well suited to large numbers of trajectories in a city road network because of inadequate distance measures between two trajectories. In this paper we propose a novel Dijkstra based Dynamic Time Warping (DTW) distance measure, trajDTW between two trajectories, which is su...

We calculated the usable distance of the main roads in the coastal area of Iwate prefecture following the 2011 Tohoku Earthquake. Calculations were based on a vehicle tracking map built from G-BOOK telematics data using QGIS, an open source geographic information system. The main findings are as follows. (1) The change in the accumulative usable road distance ratio during the research period di...

In order to search similar moving object trajectories, the previously used methods focused on Euclidean distance and considered only spatial similarity. Euclidean distance is not appropriate for road network space, where the distance is limited to the space adjacent to the roads. In this paper, we consider the properties of moving objects in road network space and define temporal similarity as ...

This study aimed to evaluate the rate of ecogenotoxicity caused by traffic emissions at sites in the vicinity of roads and at sites near planned highway construction using a pollen grain abortion assay with higher wild plant species. The relationship between pollen grain abortivity and distance from a road also was assessed. The highest values were found at a distance of 30 m, where the prevail...

In this paper, we present a dynamic navigation approach (DNA) that can be combined with GPS receivers, digital maps, and wireless technologies such as DSRC, 802.11p, and WiMAX. By calculating the score, a weighted sum of average vehicle speed, average inter-vehicle distance, road type, and road gain, for each candidate road, the DNA can generate a road score table and choose the road with the h...

In a previous study, we have calculated the usable road distance in the southern coastal area of Iwate Prefecture following the 2011 Tohoku Earthquake. In this context, a usable road is one on which at least one vehicle has been probed during the observation period. If the accumulative usable distance up to September 30, 2011 is considered as 100%, then the percentage of the usable road distanc...

A methodology for estimating vehicle dynamics whith road geometry consideration is presented in this paper. Vehicle sideslip and roll parameters are estimated in the presence of the road bank angle and the road curvature as unknown inputs. The unknown inputs are then estimated using the observer results. This information about the road geometry and vehicle parameters is needed in the driver ass...