A pending problem in developing a practical magnetic lane marker system is dealing with the influence of magnetic interference when positioning markers on actual roads. Data on magnetic interference was collected from a variety of road environments, ranging from expressways to general roads, in order to specify locations where strong magnetic interference occurs. The influence of magnetic interference was assessed by analyzing the frequency of this interference. From the data obtained, it was determined that the greatest influence on magnetic interference in an actual road environment is reinforcement bars and other structural features of the road. An average magnetic interference of 1 gauss p-p (Gp-p) was observed. In addition, a simulation was performed in an actual road environment using three types of magnetic markers and the optimal magnetic level identified. (A*)
Abstract