单选题 · 选择一个答案
What do the black-and-white and black-and-yellow striped marker boards at the bridge shown indicate?
图中桥头的黑白及黑黄斜纹标记分别表示什么？
Black-and-white bridge markers identify the left edge; black-and-yellow markers identify the right.
黑白标记指示桥梁左侧边界，黑黄标记指示桥梁右侧边界。
阅读相关知识
These aid edge visibility, especially at night. They do not identify parking, underground services or terrain below; slow and watch opposing traffic.
这些反光标记帮助辨认狭窄桥面的边缘，夜间尤其重要；它们不说明停车许可、地下管线或桥下地形。接近时应调整速度并注意桥上的来车。