What letter is not in car license plates: analysis of GOST prohibitions

When trying to decipher the combination on the state registration plate, the driver immediately notices that the familiar alphabet has been reduced to a minimum. Standard license plates of the Russian Federation do not contain letters whose graphic design does not coincide with the Latin characters used in international traffic. This is a fundamental rule enshrined in GOST R 50577-2018, which directly affects the readability of the region code and vehicle series by police cameras and traffic police officers anywhere in the world.

The absence of certain characters in the numbering of vehicles is dictated by the need to integrate the Russian automobile industry into the international accounting system. If the series used characters that have no analogues in the Latin alphabet, such as “y”, “b” or “b”, this would create critical difficulties in automatically reading license plates abroad. That is why the set of acceptable characters is strictly limited to twelve positions, which is a compromise between national tradition and the requirements of the Vienna Convention on Road Traffic.

Car owners often wonder why this particular set was chosen, and whether there are plans to expand the list. At the moment, the likelihood of new letters appearing in the series is extremely low, since even with a limited alphabet there are enough combinations for tens of millions of vehicles. Understanding that what letter is not in car license plates, helps you quickly navigate the flow of information and avoid mistakes when filling out official documents or searching for a car in the parking lot.

Historical context and international standards

The transition to using a limited set of characters did not happen overnight, but was the result of a long evolution of automobile numbering. During the Soviet period, especially in the post-war years, the format of the issues changed, but the requirement of readability remained a priority. With the collapse of the USSR and the increase in the number of international trips, the question arose of bringing Russian license plates to a single European standard.

The key point was the correspondence of the graphic symbols of the Cyrillic and Latin alphabet. Letters that are visually identical or very similar in both alphabets are given the green light. This made it possible to avoid confusion when, for example, the Russian “B” could be mistaken for the Latin “B”, and the Russian “E” for “E”. However, not all letters passed this filter.

• 🚗 The main selection criterion was visual similarity to Latin analogues.
• 🌍 The requirement is supported by international road traffic agreements.
• 📜 GOST R 50577-2018 finally fixed the list of 12 permitted characters.

It is important to note that even within the allowed list there are characters whose use is restricted. For example, the letter "O" is extremely rare in the series to avoid confusion with the number "0", although technically it is allowed. Such nuances emphasize that standardization is a living process that takes into account practical experience in operating vehicles.

Complete list of allowed and prohibited characters

To know exactly which letter is not in the car license plates, you need to refer to the official documentation. To date, only 12 Cyrillic letters can be used in a series of state registration plates. All other characters of the Russian alphabet are excluded from circulation at the legislative level.

The allowed list is as follows: A, B, E, K, M, N, O, R, S, T, U, X. Any other combinations that you can see on the Internet or on souvenirs are either comic or illegal (illegal). Using non-standard symbols on a real car will result in a fine and removal of license plates.

⚠️ Attention: Setting a number with letters not included in the permitted list (for example, "Sh", “Z”, “L”) is equivalent to the use of counterfeit documents and entails criminal liability.

The remaining 21 letters of the Russian alphabet (B, G, D, Zh, I, Y, L, P, F, Ts, Ch, Sh, Shch, Y, b, E, Yu, Ya, b) are not included in the numbering. Some of them, such as "B" or "G", could have had Latin counterparts, but were excluded to avoid confusion with numbers (6 and 9) or other symbols. Others, which have no analogues in the Latin alphabet, simply do not fit into the international format.

Technical reasons for excluding letters

The main technical reason for the exclusion of most letters was the problem of optical recognition. Modern violation detection systems, such as the Potok or Strelka complexes, operate on the basis of algorithms that can confuse similar symbols. If the numbers used the letter "Z", the camera could count it as a "3" or "8", which would lead to erroneous fines.

In addition, there is the problem of handwriting and visual inspection by the inspector. In a stressful situation, during a chase or test, a person tends to simplify images. Letters of complex shapes, such as “Zh” or "Sh", are difficult to quickly and clearly name on the radio or write down in the protocol without errors. Simple geometric shapes (A, K, M, T) are perceived by the brain faster.

Why is there no letter "D"?

The letter "D" is visually similar to the number "5" (especially in some fonts) and the Latin "D". However, the Latin "D" is not used in license plates, and confusion with the number "5" is too high. Therefore, "D" was excluded from the series to minimize reading errors.

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Wear resistance and readability in poor conditions are also worth considering. Dirt, snow or partial damage to the number can make complex characters unreadable. Simple symbols such as "O" or "X" are easier to recall in the mind when partially polluted than "Y" or "I".

Influence of format on numbering capacity

Many people mistakenly believe that shortening the alphabet drastically reduces the number of possible combinations. However, even with 12 letters, the mathematical numbering model provides enormous capacity. The formula for calculating combinations takes into account the number of positions for letters and numbers in the standard format “U 000 UU 00”.

For one region with a three-digit code (although now codes can be four-digit in the future, but for now 3 digits are the standard), the number of options is in the millions. Even if all 12 letters are used in the series, the limit will not be exhausted soon. This proves that optimization alphabet does not carry the risk of a shortage of numbers.

Position in the room	Possible characters	Number of options
1st letter (series)	12 letters	12
Digits (number)	0-9 (3 characters)	1000
2nd and 3rd letters (series)	12 letters (2 characters)	144
Total combinations	Per area code	1 728 000

As you can see from the table, more than 1.7 million combinations are available even for one region. Considering that region codes can be two- and three-digit, and new codes are being introduced for overcrowded regions (for example, 799 for Moscow), the numbering resource will last for decades to come without expanding the alphabet.

poll:Have you noticed numbers with non-standard letters?

Yes, I saw the "comic" numbers

No, only standard A, B, E, K...

I saw old Soviet numbers

I find it difficult to answer

Regional features and codes

Although the set of letters is uniform throughout the country, the distribution of series may vary depending on the region. In large cities such as Moscow and St. Petersburg, where the density of vehicles is maximum, almost all possible combinations of permitted letters are used. Here you can find rare series that are almost impossible to see in small towns.

In some republics of the Russian Federation, for example, in Tatarstan or Bashkortostan, there are unofficial preferences for certain letters that are associated with the first letters of the names of regions or cities if they are on the allowed list (for example, “U” for Ufa). However, there are no official priorities when issuing them; it all depends on the order in which the license plates pass through the traffic police database.

With the introduction of new region codes (for example, 777, 799, 797 for Moscow), the load on the letter series has increased. This led to the fact that “beautiful numbers” with repeating letters (AAA, LLC) began to appear on sale, which are in high demand. The absence of other letters makes such combinations even more valuable and rare.

Recognition problems and human factor

Despite strict standards, problems with reading numbers still arise. Often this is not due to the absence of the desired letter, but to contamination, damage, or the use of special frames that hide part of the character. However, even in their pure form, some permitted letters can be controversial.

For example, the letter "B" in fast motion can easily be confused with the number "8", especially if it is partially erased. The letter "P" can be mistaken for "B" or "8". That is why it is important that the font on the numbers corresponds to GOST in terms of height, width and thickness of lines. Any deviations complicate the operation of automatic systems.

Traffic police officers undergo special training in reading license plates, but they can make mistakes. In protocols you can often find the entry “unclear number” if it is impossible to visually identify the symbol. In such cases, knowledge about how to what letter cannot be, which allows the correct symbol to be determined by elimination.

• 👁️ The human eye is prone to errors in poor lighting.
• 📹 Recording cameras can make mistakes in 5-10% of cases if the image quality is poor.
• 🧹 Dirt and snow are the main enemies of the readability of any, even simple symbols.

The room is clean and not framed

All letters and numbers are clearly visible

No damage to paint or metal

The font format corresponds to the standard-->

Prospects for changing numbering rules

The question of expanding the alphabet is raised regularly, especially in light of the increase in the car fleet. However, experts are inclined to believe that there will be no radical changes. Instead of introducing new letters that would require a change in international agreement, it is easier to implement three-digit area codes or change the format of the numbers themselves (for example, reducing the font size or changing the arrangement of elements).

The possibility of digitalization of accounting is also being discussed, when the physical number will become just one of the identifiers, and the main one will be the digital profile of the car, read using RFID tags. In this case, the visual readability of letters will fade into the background, but the implementation of such systems is still far away.

⚠️ Attention: Rumors about the introduction of the letters “D”, “L” or “P” into circulation have no official basis. Any changes to GOST require a lengthy procedure for approval and publication in official sources.

Thus, the answer to the question “which letter is missing from the license plates” remains stable: all but twelve “selected” are missing. This conservatism ensures the stability of the accounting system and minimizes errors on an international scale.

Frequently asked questions (FAQ)

Why are there no letters "D" in the numbers?

The letter "D" is excluded due to the high risk of confusion with the number "5" and the Latin letter "D". Visual similarity to the figure is especially critical for automatic recognition systems, which could lead to massive errors when issuing fines.

How many letters are allowed in license plates?

In accordance with GOST R 50577-2018, only 12 Cyrillic letters are allowed to be used in a series of registration plates: A, B, E, K, M, N, O, R, S, T, U, X. These letters have graphic analogues in the Latin alphabet.

Is it possible to order a number with the letter "B"?

No, it is impossible to order a state registration plate with the letter "B". Such a combination will be considered invalid, and the car will not be registered with the traffic police. Using such license plates is equivalent to driving without license plates or with fake plates.

Why are the letters "I" and "Y" not used?

The letters “I” and “Y” do not have unambiguous graphic analogues in the Latin alphabet used in international vehicle markings. “I” is sometimes confused with “N” or “H”, and “Y” does not have a direct correspondence, which violates the principle of international readability.

What happens if the letter on the number is erased?

If the letter cannot be read visually due to paint wear or damage, the traffic police inspector has the right to issue a fine for unreadable numbers (Part 4 of Article 12.2 of the Code of Administrative Offenses of the Russian Federation). In this case, the license plate must be replaced with a new one.