A vehicular system adapted to wirelessly communicate with a wireless tag attached to a magnetic marker laid in a road, the system comprising: a marker detecting part adapted to detect the magnetic marker by sensing magnetism; a wireless communication part adapted to acquire tag information by executing a communication process with the wireless tag; a communication start point setting part adapted to set a communication start point at which the wireless communication part is caused to start the communication process, wherein the communication start point setting part sets the communication start point with reference to a time point of detection at which the marker detecting part detects the magnetic marker, and the communication start point is a time in which a time required for the vehicle to travel a reference distance is subtracted from a time at which the wireless communication part passes straight above the magnetic marker; and a forced termination point setting part adapted to set a forced termination point at which the communication process by the wireless communication part is terminated, wherein the forced termination point is a time in which the time required for the vehicle to travel the reference distance is added to the time at which the wireless communication part passes straight above the magnetic marker; wherein a limit period with the communication start point as a start time and the forced termination point as a termination wherein the wireless communication part is configured to: start the communication process at the communication start point, in this limit period, terminate the communication process, if reading the tag information is completed, immediately in the middle of the limit period, and terminate the communication process at the forced termination point irrespective of whether the tag information is acquired or not. a marker detecting part adapted to detect the magnetic marker by sensing magnetism; a wireless communication part adapted to acquire tag information by executing a communication process with the wireless tag; a communication start point setting part adapted to set a communication start point at which the wireless communication part is caused to start the communication process, wherein the communication start point setting part sets the communication start point with reference to a time point of detection at which the marker detecting part detects the magnetic marker, and the communication start point is a time in which a time required for the vehicle to travel a reference distance is subtracted from a time at which the wireless communication part passes straight above the magnetic marker; and the communication start point setting part sets the communication start point with reference to a time point of detection at which the marker detecting part detects the magnetic marker, and the communication start point is a time in which a time required for the vehicle to travel a reference distance is subtracted from a time at which the wireless communication part passes straight above the magnetic marker; and a forced termination point setting part adapted to set a forced termination point at which the communication process by the wireless communication part is terminated, wherein the forced termination point is a time in which the time required for the vehicle to travel the reference distance is added to the time at which the wireless communication part passes straight above the magnetic marker; wherein a limit period with the communication start point as a start time and the forced termination point as a termination wherein the wireless communication part is configured to: start the communication process at the communication start point, in this limit period, terminate the communication process, if reading the tag information is completed, immediately in the middle of the limit period, and terminate the communication process at the forced termination point irrespective of whether the tag information is acquired or not. start the communication process at the communication start point, in this limit period, terminate the communication process, if reading the tag information is completed, immediately in the middle of the limit period, and terminate the communication process at the forced termination point irrespective of whether the tag information is acquired or not.