Well, one reason for that amount of signage is that there are multiple roads from the right and some of those signs only extend to the next junction. There's simply no way to have fewer of those signs. Same for the pedestrian crossings.

Some of the signs are only relevant to pedestrians and cyclists, or motorists looking for a place to park, so it's not that bad.

It can be way better. Some ideas:

- pedestrian/cyclists signs can be made on the pavement instead

- which lane goes where is repeated 3 times - if it's so that you know them when you join the road, 2 can be moved to the side roads instead

- one of the right of way signs can go

- no parking can be replaced with a chain / bolards

- the end of pedestrian/cyclist path is useless since it's reopened after the crossing

Poland puts the repeated signs after each and every tiny side road. Many countries don't do that. Instead they rely on more informative big signs over the intersections that can be visible from further away.

I'm not sure the signs on the pavement have the same meaning as the actual signs. In many places (Germany for example) »signs« on the ground are merely a courtesy (e.g. the 30 in 30 zones), but not legally binding, and the actual signs define the rules.

They're called horizonal and vertical signs in Poland and they are binding. The solid line between lanes counts as a horizontal sign as well.

Wow, that is crazy! Now imagine those were US style signs that are covered in text instead abstract symbols...