Traffic signals (S)

Traffic lights use unique symbols for trams, cyclists or reversible lanes. This chapter explains what each combination means and how it affects priority when multiple signals operate at the same intersection.

Symbol	Meaning	Explanation
S-1	Traffic lights with signals for directing traffic	The S-1 traffic light gives the basic light signals for directing traffic. Light signals: green light – permits entry past the signal, but only if it does not hinder pedestrians or cyclists and if the driver is able to leave the intersection before the end of the signal yellow light – means a prohibition of entry, unless stopping would require sudden braking red light – an absolute prohibition of entry red and yellow together – a prohibition of entry, simultaneously informing of an upcoming green signal. Outside intersections, the signal may display only red and green lights, e.g. at road narrowings.
S-2	Traffic light with a signal permitting turning in the direction indicated by an arrow	The S-2 traffic light displays a red light with a green arrow. This means that the driver may turn in the direction indicated by the arrow, provided that the driver stops before the signal and does not impede other traffic. If the arrow indicates to the left, it also permits a U-turn, unless this is prohibited by the sign B-23.
S-3	Directional traffic light	The S-3 (directional) traffic light gives signals exclusively for drivers travelling in the direction indicated by the arrow. Green light means that, in that direction, there is no conflict with other road users. In the case of traffic lights for a left turn, they do not always have to be placed on the right-hand side of the road.
S-3a	Directional traffic light for straight ahead and left	The S-3a traffic light indicates the direction of travel straight ahead and left. The light signals apply exclusively to vehicles travelling in the direction of the arrows. Green light confirms the absence of conflict with other road users. Directional traffic lights controlling a left turn may not be positioned on the right-hand side of the carriageway.
S-3b	Directional traffic light for straight ahead and right	The S-3b traffic light indicates the direction of travel straight ahead and right. The light signals apply exclusively to vehicles travelling in the direction of the arrows. Green light confirms the absence of conflict with other road users.
S-3c	Directional traffic light for straight ahead	The S-3c traffic light indicates the direction of travel straight ahead. The light signals apply exclusively to vehicles travelling in the direction of the arrows. Green light confirms the absence of conflict with other road users.
S-3d	Directional traffic light for turning right	The S-3d traffic light indicates the direction of travel to the right. The light signals apply exclusively to vehicles travelling in the direction of the arrows. Green light confirms the absence of conflict with other road users.
S-3e	Directional traffic light for turning left	The S-3e traffic light indicates the direction of travel to the left. The light signals apply exclusively to vehicles travelling in the direction of the arrows. Green light confirms the absence of conflict with other road users.
S-3f	Directional traffic light for turning left permitting a U-turn	The S-3f traffic light indicates the direction of travel to the left, as well as for vehicles making a U-turn. The light signals apply exclusively to vehicles travelling in the direction of the arrows. Green light confirms the absence of conflict with other road users. Directional traffic lights for a left turn may be positioned outside the right-hand side of the carriageway.
S-3g	Directional traffic light for U-turning vehicles	The S-3g traffic light is intended exclusively for vehicles making a U-turn. The light signals apply exclusively to vehicles travelling in the direction of the arrows. Green light confirms the absence of conflict with other road users. Directional traffic lights for a left turn may be positioned outside the right-hand side of the carriageway.
S-3h	Directional traffic light for turning left and right	The S-3h traffic light indicates directions to the left and to the right. The light signals apply exclusively to vehicles travelling in the direction of the arrows. Green light confirms the absence of conflict with other road users.
S-4	Traffic light with signals for traffic lanes	The S-4 traffic light displays signals for traffic lanes: green light – permits entry into the traffic lane above which the traffic light is placed; red light – prohibits entry into that lane.
S-5	Traffic light with signals for pedestrians	The S-5 traffic light is intended for pedestrians: green light – permits entering the crossing; flashing green – the pedestrian should leave the crossing as quickly as possible, because in a moment the red light will come on; red light – prohibits entering.
S-6	Traffic light with signals for cyclists	The S-6 traffic light is intended for cyclists: green light – permits entering the cyclist crossing; flashing green – the cyclist should leave the crossing as quickly as possible; red light – prohibits entering.
S-7	Traffic light with a signal ordering to leave the lane	The S-7 traffic light gives signals ordering to leave the lane. A steady or flashing light means that the driver must leave the lane above which the signal is located, in the direction indicated by the arrow.