Englezii 'indicate'
Americanii 'signal' pentru acelasi lucru.
mult succes

I'm not sure you have to use motorists slang in your translation; you'd better not "step on it".

US
When you need to make a turn, always slow down and flash your turn signal well in advance.
Similarly, impaired drivers often forget to signal a turn or lane change, or the
...drivers often forget to signal a turn or lane change, or their signal is inconsistent with their maneuver, for example, signaling left, but turning right...

UK
Most popular ways English drivers like to break the law:
3.Not Using a Signal - You should KNOW they want to turn left at a four-way intersection.

10. Giving Appropriate Signals
Where necessary - Omitting to re-apply when it self cancels / Omitting to give a signal where necessary
Correctly - Signalling unnecessarily / Wrong arm signals / Omitting to cancel after use
Incorrect (i.e. left for right, right for left) / Flashing the headlights at another driver to proceed or turn / Having the hazard lights on whilst on the move / Unnecessary use of the horn / Beckoning pedestrians / Misleading signal before intended left and right turn
Properly Timed - Giving late exit signals at roundabouts / Arriving at a junction and then signalling / Signalling after starting the manoeuvre / Signalling far too early or too late