| 摘要 |
Abstract A road rule display system (10) comprising a sign (12) having a display (14) 5 for displaying information regarding road usage requirements. The display (14) is changeable to display at least a first road usage requirement and a second road usage requirement. A water sensor (16) is located in the vicinity of the sign (12) for detecting the presence of water due to precipitation. When the water sensor (16) detects the presence of water, the display (14) on the 10 sign (12) changes from displaying the first road usage requirement to the second road usage requirement. C) C~Co co ci |
