How traffic lights work at intersections – the basics
Intersections with traffic lights are places where road traffic is controlled using light signals that organize and regulate the flow of vehicles, pedestrians, and cyclists. In Poland, three-color signals (green, yellow, red) are mainly used for vehicles, and two-color signals for pedestrians.
The basic traffic light signals are:
- Green – allows you to pass the signal, provided that this does not hinder pedestrians or cyclists from leaving the roadway and does not block the intersection.
- Yellow – prohibits passing the signal, unless stopping would require sudden braking; this signal means that a red light will appear shortly.
- Red – an absolute prohibition on passing the signal.
- Red and yellow at the same time – prohibition on passing the signal and an announcement that the green light is coming.
Conditional arrow (green arrow with a red light)
At many intersections, you can see a so-called conditional arrow – a small green arrow illuminated together with a red light, most often pointing right. It allows you to turn, but only under certain conditions:
- Before passing the signal you must stop at the stop line or, if there is none, before the signal.
- Make sure you do not endanger pedestrians, cyclists, or other vehicles that have a green light.
- Only after meeting the conditions above may you carefully proceed in the direction indicated by the arrow, without impeding other road users.
Remember – failing to stop before the green arrow is an offense!
Directional signals (conditional)
At intersections, we increasingly encounter directional signals that indicate which direction you may travel. These are arrow signals that may apply to going straight, turning left, turning right, making a U-turn, or several directions at once.
A green light on this type of signal means there is no conflict with other vehicles, pedestrians, or cyclists. Nevertheless, you should exercise particular caution.
- Directional signal for going straight – allows travel only straight ahead when the green arrow is lit.
- Directional signal for left or right – allows turning only in the indicated direction, as shown by the arrow.
- Directional signal for U-turning vehicles – allows a conflict-free U-turn at the intersection.
- Directional signal for straight ahead and left/right/U-turn – allows travel in several directions at once if all arrows are green.
Important: When a directional signal is red, you must not travel in that direction, even if other signals show green. Always follow the indications of the signal that applies to your lane.
Signal hierarchy and right of way
Traffic lights take precedence over vertical and horizontal road signs. The exception is the instructions of a person directing traffic, which take priority over light signals.
Safe driving through intersections with traffic lights – 7 key tips
- Watch the traffic lights and be ready to stop or move according to their indications.
- Keep a safe distance from the vehicle in front to avoid a collision during sudden braking.
- Do not speed up on yellow – it is dangerous and against the rules.
- Pay attention to pedestrians and cyclists, especially when turning.
- With directional signals, follow the arrows that allow movement in specific directions.
- In case of a signal failure, treat the intersection as uncontrolled and follow the right-of-way rules resulting from signs or general regulations.
- Be patient and cautious, avoid risky maneuvers, and always yield when the situation is unclear.
Summary
Intersections with traffic lights significantly improve safety and traffic flow, provided the rules are followed. Traffic lights have overriding importance, but you must always stay alert for other road users and any instructions from a person directing traffic. Following the signals, driving at an appropriate speed, and being cautious are the keys to safely passing through any traffic-light-controlled intersection.
