最初の信号を

at the first traffic light

→ 最初
phrase Rare #40,036
at the first traffic light Used when giving directions, usually before saying which way to turn. Here, 信号 means a traffic light.
JA: 最初の信号を右に曲がってください。
EN: Please turn right at the first traffic light.

最初の信号を右折して。

Turn right at the first traffic light.

最初の信号を左へ曲がるのですか。

Do I turn left at the first traffic light?

最初の信号を右に。

Turn right at the first traffic light.

最初の信号を左へ曲がって下さい。

Please turn left at the first traffic light.