| 摘要 |
The present invention relates to a real time circumstance sign for T type roads. The present invention comprises: an ultrasound sensor unit for sensing the speed of vehicles on a road and the number vehicles via ultrasonic waves and transmitting road circumstance information; a circumstance information control unit for receiving the road circumstance information transmitted via the ultrasound sensor unit and extracting information on entry of vehicles from the received road circumstance information; and a circumstance information display unit for displaying the road circumstance information including the information on entry of vehicles extracted by the circumstance information control unit to users. |
