The S-840 STOP presignaling sign is an important supplementary panel used in Spain. It never stands alone; instead, it must always be read in conjunction with the primary traffic sign it accompanies, such as a STOP sign. This additional panel provides vital clarifications, such as distance, direction, or specific vehicle applicability, refining the instruction of the main sign. Always pay close attention to these panels as they significantly alter how you should interpret and react to the main traffic rule.
This additional panel, the S-840 STOP Presignaling sign, modifies the main traffic sign it accompanies, specifying conditions like distance or vehicle type. Mastering its interpretation is vital for accurate understanding and successful theory test revision.
The sign for stop presignaling is an additional Spanish panel that modifies the meaning of the main sign it accompanies. It can define distance, direction, vehicle type, time period, exception, or another application detail that changes how the main sign should be understood. On its own it is incomplete, so it must always be read as part of the combined message displayed together with the primary sign. Drivers should pay close attention to these panels because small clarifications often make a major difference to the rule in force.
This additional panel clarifies how the main sign applies to stop presignaling. It should always be read together with the sign above it, not as a stand-alone instruction.
Get clear, practical answers to the most common questions about the S-840 - STOP presignaling road sign. Learn how the sign works, what rules it represents, and how it affects real driving situations. This FAQ strengthens your understanding and supports accurate decision making for the Spanish driving theory exam in Spain.
The S-840 STOP presignaling sign is an auxiliary panel designed to modify or clarify the main traffic sign it is placed below. Its purpose is to provide additional context, such as a specific distance to the main sign, a particular direction, or limitations on which vehicles the main sign applies to. It helps drivers understand precisely how and when to comply with the primary road instruction.
No, you must never react to the S-840 STOP presignaling sign as if it were a standalone instruction. It is designed to be read and understood only in combination with the main sign positioned above it. Ignoring this rule means you might misunderstand or completely miss the actual traffic regulation that applies to you.
When placed below a STOP sign, the S-840 panel might indicate, for example, that the mandatory stop is required at a certain distance ahead (e.g., '300m STOP'), or that it applies only on a specific road direction. Always read the distance or directional information on the S-840 panel to know exactly where and when you need to perform the stop.
A common mistake is failing to read the presignaling panel together with the main sign, or misinterpreting its supplemental information. For example, a learner might stop immediately if they see a STOP sign, without noticing an S-840 panel indicating the stop is 300 meters further down the road. Always check for these panels and understand their clarifying role.
You will typically see the S-840 presignaling sign in situations where a main sign, like the STOP sign, needs a specific clarification that cannot be conveyed by the main sign alone. This is often used on approach to junctions or specific points on the road where the exact application of the rule needs to be precise, especially when varying conditions or distances are involved.
A clear reference image of the S-840 - STOP presignaling road sign used in Spain.

The S-840 - STOP presignaling road sign may also be known by these alternative names or terms.
The S-840 - STOP presignaling road sign is part of the Additional Panels category, which groups together signs with similar rules and functions.
Understanding related Spanish road signs side-by-side is key for accurate theory test revision. Comparing similar signs aids in quick recognition and reduces common errors, improving your overall driving knowledge for the DGT exam.

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