Clause 1.10 (terms "Stop" and "Parking")

Stop — cessation of movement of a vehicle for up to 5 minutes or more if necessary for boarding (alighting) passengers or loading (unloading) cargo, fulfilling the requirements of these Rules, or in case of an obstacle to movement.

Parking — cessation of movement of a vehicle for more than 5 minutes for reasons not related to the need to fulfill the requirements of these Rules, boarding (alighting) passengers, or loading (unloading) cargo.

Clause 15.3 (Section 15 "Stopping and Parking")

In populated areas, stopping and parking of vehicles are permitted on the left side of the road, which has one lane for traffic in each direction (without tram tracks in the middle) and is not divided by road marking 1.1.

Explanation of application: this rule allows the black car to stand on the left side of the carriageway in a populated area (in the absence of marking 1.1 and tram tracks in the middle).

Clause 33.3.34 — 33 "Road Signs", 3 "Prohibitory Signs", sign 3.34 "No Stopping"

Sign 3.34 "No Stopping" prohibits stopping and parking of vehicles.

The effect of the sign applies only to the side of the road on which it is installed.

The area of effect of the sign is from the place of installation to the nearest intersection beyond it, and in populated areas where there are no intersections — to the end of the populated area; the effect of the sign is not interrupted at places where roads adjoin from adjacent territories and at intersections (junctions) with field, forest, and other unpaved roads, before which no priority signs are installed.

Explanation of application: sign 3.34 restricts stopping/parking only on the right side (where it is installed), so its effect does not apply to the left side (where the black car is parked).

Clause 33.7.18 — 33 "Road Signs", 7 "Plates to Road Signs", plate 7.18 "Except for persons with disabilities"

Plate 7.18 "Except for persons with disabilities" means that the effect of the sign does not apply to motor wheelchairs and cars marked with the identification sign "Driver with a disability" in accordance with the requirements of these Rules.

It is used with signs 3.1, 3.34, 3.35, 3.36, 3.37, 3.38. The plate is placed directly under the signs with which it is used.

Explanation of application: if 7.18 is present under 3.34, the prohibition of stopping/parking does not apply to a car marked with the identification sign "Driver with a disability" (red car).

Clause 30.3 (g) (Section 30 "Number, Identification Signs, Inscriptions and Markings")

The following identification signs are installed on the relevant vehicles: g) "Driver with a disability" — a yellow square with a side of 150 mm and a black image of the symbol of plate 7.17 "Persons with disabilities". The sign is placed at the front and rear of motor vehicles operated by drivers with disabilities or drivers carrying passengers with disabilities.

Explanation of application: the presence of this identification sign is the condition under which plate 7.18 cancels the effect of prohibition 3.34 for the red car.

Clause 33.7.2.2 — 33 "Road Signs", 7 "Plates to Road Signs", plate 7.2.2 "Area of effect"

Plate 7.2.2 "Area of effect" is used to indicate the area of effect of a road sign (in particular, the length/boundary of the restriction), as determined by this plate.

Explanation of application: in questions of this type, it is checked that the area of effect of prohibitory signs can be specified by plates "Area of effect", but even without them, the effect of 3.34 applies only to the side of sign installation.

That is, the correct answer is "Both are parked correctly.", given that according to the definition of the Traffic Rules, sign 3.34 applies only to the side of installation (so the black car on the left is not under prohibition), and on the right side, there is an exception for vehicles with the identification sign "Driver with a disability" (so the red car also does not violate).

In this situation, we have a populated area and two cars parked on different sides of the roadway: the black one on the left, the red one on the right. On the right side, there is a prohibitory sign 3.34 "No stopping" with an additional plate.

First, let's determine to whom sign 3.34 applies. According to the Traffic Rules, it prohibits both stopping and parking, but an important rule is this: the effect of this sign applies only to the side of the road where it is installed. Therefore, the sign restricts stopping/parking only on the right side, and does not apply to the left side (where the black car is parked).

Now regarding the black car on the left. In a populated area, the Traffic Rules allow stopping and parking on the left side of the road if it is a road with one lane in each direction and there are no tram tracks in the middle or a solid line separating the flows. This is exactly the situation shown in the question, so parking the black car on the left is not a violation.

Next, let's consider the red car on the right, where sign 3.34 is installed. Under the sign, there is a plate 7.18 "Except for persons with disabilities." This means that the prohibition of this sign does not apply to vehicles driven by a driver with a disability or carrying a passenger with a disability, provided there are appropriate grounds, and such vehicles must be marked with the "Driver with a disability" identification sign. In the image, such an identification sign is present on the red car, so it falls under the exception and may park in the sign's zone.

Additionally, it is worth remembering the boundaries of the sign's effect: in a populated area, it usually applies from the place of installation to the nearest intersection (or to the end of the populated area), and plates like 7.2.2 can specify the length of the zone. However, in this task, the key point is not the length, but that the sign applies only to the right side, and that for a car marked "Driver with a disability" there is a direct exception due to plate 7.18.

Therefore, the correct answer is "Both are parked correctly," since sign 3.34 applies only to the right side of the road, the black car on the left may park in a populated area under the given conditions, and the red car on the right has the right to park thanks to plate 7.18 and the "Driver with a disability" identification sign.