An odd feature of this cartoon is that the traffic lights are "upside down"; they have red on the bottom and green on the top.

Some people on RuTracker asked about this back in 2013 - here's a translation of the reply of user "dvdss" there, who did some research:

Previously, the location of signals at traffic lights was not regulated, and the red light in some countries was located at the bottom of the traffic light. Only in 1949 was the Convention on Road Traffic and the Protocol on Road Signs and Signals adopted in Geneva. This unified national traffic standards and established the modern type of traffic light with the red signal located on top.

Therefore, the pre-WW2 Soviet New Year tree toy "Traffic Light" (Светофор), made of cardboard, had the upper light green and the lower one red. (The year of installation of the first traffic lights in the USSR was 1935)



This suggests the conclusion that, despite the fact that the cartoon was created in 1952, and the adoption of the Convention on the Unification of Colors in Geneva occurred in 1949, these rules reached the USSR a little later (at least 3 years later). Although in those days this was probably not the most important thing in the country, but an interesting fact!

And for sure, the traffic lights were not switched over to the new color layout in one day, so the director and artists likely drew the old traffic light model only because the new ones were not yet in front of their eyes - but who knows!