The minimum distance or time to activate your turn signal before making a turn depends on your speed and local traffic laws, but general guidelines are as follows:
- You should activate your turn signal at least 100 feet (about 30 meters) before the turn. This distance allows other drivers enough time to see your signal and react safely
- In terms of time, signaling 3-4 seconds before the turn is recommended for city driving at moderate speeds (25-35 mph or about 40-56 km/h)
- At higher speeds, such as on highways (50+ mph or 80+ km/h), you should signal even earlier, approximately 5 seconds or more before the turn
- Some traffic regulations specify signaling distances based on speed, for example:
- 75 feet at 25 mph
- 100 feet at 35 mph
- 150 feet at 45 mph
- 220 feet at 55 mph
These distances ensure adequate warning for other road users
- In lower speed areas (under 60 km/h), signaling at least 30 meters before the turn is advised; at higher speeds, signaling at least 150 meters ahead is recommended
- Always keep your turn signal on throughout the entire turning maneuver until the turn is completed to avoid confusing other drivers
In summary, the minimum advance activation of your turn signal should be about 100 feet or 3-4 seconds before the turn in typical city driving, with longer distances or times required at higher speeds or specific local regulations. Signaling earlier rather than later improves safety by giving others sufficient time to respond
