A method for detecting a narrow road includes calculating relative heights of points from a distance measuring sensor to a ground based on distance information. The apparatuses include a processor communicating with memory. The gear modules may be spaced on the rack bars to any number of positions wherein they will engage with louver gears from an array of louvers engaged with the frame. Together, the interface surfaces, sensing device and computer system are capable of effecting auction bid transactions over a network. The prewiping device has a belt conveyor device for discharging the removed ink to the outside of the printing press. The second end portion of the conductive post is connected to the semiconductor element, and a side surface of the conductive post is fixed to the conductor on the wall surface of the hole deformed by pressing force of the conductive post on a side closer to the first end portion than the second end portion.