On a road with several lanes in the same direction of travel, do the indications of the traffic signs apply to the entire width of the carriageway?
Signage: General rules
Explanation
On a road with multiple lanes in the same direction, **traffic signals** generally apply to the entire width of the roadway. This means that all drivers must follow the indications of the signals, regardless of which lane they are in. However, there are exceptions: if there are **specific road markings** indicating a different direction or rule for a particular lane, then the signal will apply only to that lane.

For example, **arrows painted on the lanes** indicate the direction that drivers must follow. If the signals allow, drivers can change lanes, but they must respect the indications of the arrows while driving in a specific lane.
In summary, as a general rule, signals affect the entire roadway, but they can be limited to one or more lanes if there are specific indications pointing this out.
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