Discreet code on the CNH can bring immediate consequences to the inattentive driver, with a direct impact on the way they drive, the type of vehicle allowed, and even the mandatory use of visual aids, requiring constant attention to avoid severe penalties and vehicle impoundment.
Drivers who have the letters “A” or “D” in the observation field of their National Driver’s License (CNH) need to redouble their attention when driving, as these codes indicate mandatory restrictions that directly impact how the vehicle must be driven.
When these requirements are ignored, the driver is subject to a very serious infraction, with a fine of R$ 293.47, seven points on the license, and vehicle impoundment, a measure applied until the situation is regularized or another qualified driver takes over.
Although they often go unnoticed in the document, these letters are not related to the license category, as they represent conditions established after medical and psychological evaluation that defined the limits for what is considered safe driving.
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Meaning of letters A and D on the CNH
In the case of code “A”, the indication is clear: the driver must use visual correction whenever behind the wheel, including glasses or contact lenses, as determined at the time their fitness to drive was analyzed.
The presence of letter “D”, on the other hand, points to a limitation linked to the type of vehicle, allowing only the driving of cars with automatic transmission, which prevents the use of models with manual transmission due to the conditions established on the license.
Why restrictions must be respected
These determinations are part of the criteria that guaranteed authorization to drive, meaning that disregarding them places the driver in a different condition than what was evaluated as safe during the license issuance process.
Furthermore, during inspections, non-compliance can be easily identified, either by the absence of glasses for those with this requirement or by driving a vehicle incompatible with the restriction recorded in the document.
Penalties for non-compliance with requirements
By disrespecting the observations on the CNH, the driver can receive a fine of R$ 293.47 and seven points on the license, in addition to facing vehicle impoundment, which remains prevented from circulating until the situation is resolved appropriately.
Even when the infraction occurs due to carelessness, the responsibility remains with the driver, who must ensure compliance with all recorded conditions, avoiding inconveniences and possible complications during traffic stops.
Where to find restrictions on the CNH
Information about restrictions is available in the observation field of the CNH, present in both the printed and digital versions, gathering all codes that indicate specific conditions for driving the vehicle.
Therefore, paying attention to this detail helps avoid problems during inspections and contributes to safer driving, aligned with the conditions that were considered appropriate at the time the driver was authorized to drive.
Periodically reviewing this data proves to be a simple and effective measure, reducing risks in traffic and preventing penalties that can be applied even in seemingly routine situations.

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