Learner: What is the symbol of the triangle outside the two opposite arrows?

On two-way roads, natural or artificial isolation measures are adopted to completely isolate the upstream and downstream traffic. This sign must be set when there is no isolated two-way lane for some reason (construction, bridge, tunnel).

Two-way traffic signs are warning signs. The black pattern on the yellow background is a two-way traffic sign ahead, which is used before the transition from multi-lane to two-lane. Generally, the background color is yellow instead of orange. ?

Extended data:

The color meaning of traffic signs

1, red: indicates prohibition, stop and danger. Borders, background colors, slashes, and background colors used for prohibition signs, cross symbols, and slash symbols, as well as warning linear guidance targets.

2. Yellow or fluorescent yellow: indicates warning and is used as the background color of warning signs.

3. Blue: indicates instruction and compliance, and is used to indicate the background color of the logo; It represents the driving information such as place name, route and direction, and is used as the background color of general road guide signs.

4. Green: indicates the driving information such as place names, routes and directions, and is used as the background color of the road signs on expressways and urban expressways.

5. Brown: Indication of tourist areas and scenic spots, used as the background color of tourist area signs.

Baidu Encyclopedia-Two-way traffic

Baidu encyclopedia-traffic signs