路标测试

The correct choice is Watch for an upcoming railroad crossing. It matches the sign, warning, regulation, or roadway instruction described in the question, and drivers must adjust speed or lane position before reaching the condition ahead. / 正确答案是：注意前方有铁路道口。它与题目所描述的标志、警告、管制或道路指示相符，驾驶员应在到达前提前调整车速或行驶位置。

The correct choice is BE PREPARED TO STOP. It matches the sign, warning, regulation, or roadway instruction described in the question, and drivers must adjust speed or lane position before reaching the condition ahead. / 正确答案是：BE PREPARED TO STOP。它与题目所描述的标志、警告、管制或道路指示相符，驾驶员应在到达前提前调整车速或行驶位置。

The correct choice is SLOW. It matches the sign, warning, regulation, or roadway instruction described in the question, and drivers must adjust speed or lane position before reaching the condition ahead. / 正确答案是：SLOW。它与题目所描述的标志、警告、管制或道路指示相符，驾驶员应在到达前提前调整车速或行驶位置。

The correct choice is Watch for a construction or maintenance project ahead. It matches the sign, warning, regulation, or roadway instruction described in the question, and drivers must adjust speed or lane position before reaching the condition ahead. / 正确答案是：注意前方有道路施工或养护作业。它与题目所描述的标志、警告、管制或道路指示相符，驾驶员应在到达前提前调整车速或行驶位置。

The yellow diamond with a “Y” symbol warns of a Y-shaped intersection ahead; slow down and watch for merging / cross traffic. / 黄色菱形内的“Y”图案表示前方 Y 形交叉路口 ，应减速并注意来自分叉方向的车辆。

This orange diamond is a work zone advance warning indicating the road is closed ahead ; follow detour signs or choose an alternate route. / 橙底菱形为 施工区预告 ，提示 前方道路封闭 ；应按改道指示行驶或提前选择其他路线。

The correct choice is ROAD CONSTRUCTION AHEAD. It matches the sign, warning, regulation, or roadway instruction described in the question, and drivers must adjust speed or lane position before reaching the condition ahead. / 正确答案是：ROAD CONSTRUCTION AHEAD。它与题目所描述的标志、警告、管制或道路指示相符，驾驶员应在到达前提前调整车速或行驶位置。

The correct choice is Drive no faster than 65 mph day or night. It matches the sign, warning, regulation, or roadway instruction described in the question, and drivers must adjust speed or lane position before reaching the condition ahead. / 正确答案是：昼夜都不得超过 65 mph 行驶。它与题目所描述的标志、警告、管制或道路指示相符，驾驶员应在到达前提前调整车速或行驶位置。

The correct choice is Traffic is permitted to pass on either side of an island or obstruction in the roadway. It matches the sign, warning, regulation, or roadway instruction described in the question, and drivers must adjust speed or lane position before reaching the condition ahead. / 正确答案是：车辆可在道路中的安全岛或障碍物的任一侧通过。它与题目所描述的标志、警告、管制或道路指示相符，驾驶员应在到达前提前调整车速或行驶位置。

It indicates the main road curves left and a side road enters from the right; slow down and watch for entering traffic. / 该黄色菱形标志表示 前方道路向左弯并有支路从右侧并入 （组合弯道 / 交叉提示，W1-10 系列）。应减速、靠右行驶，并注意右侧进入的车辆。

The correct choice is One-way street; traffic must travel in the direction of the arrow. It matches the sign, warning, regulation, or roadway instruction described in the question, and drivers must adjust speed or lane position before reaching the condition ahead. / 正确答案是：单行道，车辆必须按箭头方向行驶。它与题目所描述的标志、警告、管制或道路指示相符，驾驶员应在到达前提前调整车速或行驶位置。

The correct choice is Left or U-turns are allowed only when the green arrow is on. It matches the sign, warning, regulation, or roadway instruction described in the question, and drivers must adjust speed or lane position before reaching the condition ahead. / 正确答案是：只有在绿箭头亮起时才允许左转或掉头。它与题目所描述的标志、警告、管制或道路指示相符，驾驶员应在到达前提前调整车速或行驶位置。