| 摘要 |
<p>A vehicle mount device 10 reads the balance of an inserted IC card 20 to transmit data to a roadside device 1. The roadside device 1 calculates and transmits a parking permission time in accordance with balance to the vehicle mount device 10. The vehicle mount device 10 outputs the parking permission time from a display part 15 and a speaker 17. The vehicle mount device 10 monitors an elapse time on the basis of time data from a time measuring part 18. When the elapse time exceeds the parking permission time upon leaving a parking place, the vehicle mount device informs a user of the above-described fact and an insufficient charge. When the parking permission time passes, the roadside device may inform the user of the lapse of the parking permission time through a portable telephone.</p> |
