When a police officer raises an arm vertically, traffic that was running parallel to the previously horizontal arm is being given the same meaning as a yellow light.

警察官が腕を垂直にあげたとき、その直前に水平にあげていた腕と平行する方向の交通にとっては、黄色の灯火の信号と同じ意味である。

This statement is TRUE

Explanation

Raising the arm vertically gives traffic that was parallel to the previously horizontal arm the same meaning as a yellow light. This also covers the moment while the arm is moving between horizontal and vertical.

Original text

腕を垂直にあげる前の状態における水平にあげた腕に平行する交通については、第二条第一項の表に掲げる黄色の灯火の信号の意味に同じ。

Source: Order for Enforcement of the Road Traffic Act — 道路交通法施行令第四条（手信号の意味） · Cabinet Order No.270 of 1960

When a police officer raises an arm vertically, traffic that was running parallel to the previously horizontal arm is being given the same meaning as a yellow light.

Explanation

Original text

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