Abstract: The present disclosure allows precise calculation of an end position and a shape change point of a retaining wall in three dimensions. A three-dimensional calculation device for a retaining wall includes: an input unit that receives an input of an attribute of the retaining wall; a calculation unit that performs intersection calculation of a retaining wall surface, which is based on the attribute inputted to the input unit, and a terrain surface included in the three-dimensional road model; a placement unit that places a cut slope in a maximum height section of the retaining wall obtained by the intersection calculation by the calculation unit; and a model generator that performs intersection calculation of a cut surface of the cut slope placed by the placement unit and the terrain surface included in the three-dimensional road model to generate a three-dimensional plane model including the cut slope and the retaining wall.

Abstract: The present disclosure allows precise calculation of an end position and a shape change point of a retaining wall in three dimensions. A three-dimensional calculation device for a retaining wall model includes: a slope placement unit that places a slope having a three-dimensional shape on a three-dimensional road model; an input unit that receives an input of an attribute of the retaining wall model; a calculation unit that calculates a three-dimensional intersection line of the slope model placed by the slope placement unit and the retaining wall model that is based on the attribute inputted to the input unit; and a display that displays information on the three-dimensional intersection line calculated by the calculation unit.

Abstract: A travel track creation device (2) includes a travel track creator (42) that creates a travel track including an inlet straight track, an inlet clothoid track formed by connecting a first group of clothoid curves, an arc track, an outlet clothoid track formed by connecting a second group of clothoid curves, and an outlet straight track, wherein the travel track creator (42) includes an arc creator (42a) that creates the arc track which is located further on a side opposite to the center side of the arc portion than a passing target point and a radius of which is as large as possible, the passing target point being separated from an inner edge of the arc portion by a predetermined distance toward the side opposite to the center side of the arc portion, and a clothoid creator (42b) that creates the inlet clothoid track in which a radius of a last tangential arc corresponds to a radius of the arc track and a start point of which is in contact with the inlet straight track and in which a direction angle of the st

Abstract: A driving assistance device that performs steering operation of a vehicle. The device includes a travel track creation device having a curvature waveform creator that creates a waveform representing a curvature of a reference travel track. A first changer changes first and second edge portions of the waveform to a ramp shape and provides the waveform with first and second ramp-shaped portions. A second changer changes each of the first and second ramp-shaped portions to a curve and provides the waveform with first, second, third, and fourth curve portions. A travel track creator creates the travel track based on the waveform. A controller provides a steering signal according to the travel track.

Abstract: A digital lane mark generation apparatus generates a highly accurate and inexpensive three-dimensional mathematical expression orbit map (a digital lane mark). The apparatus includes a GPS coordinate reception unit obtaining GPS coordinates (X, Y, Z), a gyro sensor calculating measurement values of a gradient (?, ?, ?), a camera device, a distance meter measuring a driving distance measuring point (l), a speed meter measuring a speed, a steering angle sensor measuring a steering angle (?), a road surface roughness sensor detecting a road surface roughness (?), an IC tag information reception unit detecting IC tag position information, an internal timer, and a digital lane mark generation unit generating the digital lane mark by relating obtained information to a standard time, and by using a line segment, a circular arc, and/or a clothoid curve.

Abstract: A system for supporting to drive cars has a server 10 for processing road geometry, an apparatus 20 for supporting to drive a car 70, and a computer network 40 for communicating with the server 10 and the apparatus 20, wherein the saver 10 provides road parameters and/or road information for the apparatus 20, and the apparatus 20, placed on the car 70, supports to drive the car 70 and/or automatically drives the car 70 by using the road information which includes virtual digital driving orbit (lattice of coordinate) 60 from the saver 10 and/or calculated by the road parameters, and GPS (Global Positioning System) information from GPS satellite 50 for calculating the position of the car 70.

Abstract: An apparatus for designing roads has an input unit for inputting information of design conditions and/or a command of design processing and so on, an input control unit for controlling the input unit, a design conditions database for storing data such as the information of the design conditions, a road design processing unit for executing road design in accordance with the command of the design processing and/or the information of the design conditions, a result database for storing a data file such as a road design map, an image data processing unit for converting the data file such as the road design map into a suitable output format, an output unit for outputting the road design map as three dimensional computer graphics and/or printer papers and an output control unit for controlling the output unit.

Abstract: A holder for a container for a recorded medium such as a compact disk, a cassette tape, etc. comprising a holder main body for containing the recorded media container and a locking member for preventing the container from being removed. The holder main body has an open area for receiving and releasing the container and an engagement section formed on one of its peripheral sides. When a plurality of pressable pawls formed on the locking member are inserted into a plurality of through holes formed on the engagement section of the holder main body so as to prevent the locking member from being removed from the holder main body, the locking member covers at least part of the open area and confronts the container. The locking member is removed from the holder main body only by a lock releasing tool that has a plurality of projections which simultaneously press all of the plurality of pawls of the locking member.

Abstract: A compact disk tray comprises a tray body and a locking assembly to be inserted into a center hole of a compact disk so as to hold the compact disk. The locking assembly includes a holding structure formed on the tray body and a stopper member to be engaged with the holding structure so as to prevent the compact disk from being removed. The engagement of the holding structure and the stopper member can be released only by a lock releasing device.