OK, I am not a local, I just thought that maxspeed=1 must be
a typo. Other mappers use maxspeed=* to indicate
that the road should not be used, so I try to be careful.

Hi there!
I've removed the strange value
maxspeed=3 from this way:
way/161024863
Do you know the correct value?

Hi there!
I wonder if
maxspeed=3
is a typo on these cycleways?
way/23747465,way 176330632,way 176330633

Hi there!
I found a few ways which are tagged as
tunnel=building_passage, but without a building. The roads have very strange attributes like
maxheight=1
maxspeed=2
The all cross this ditch, so it seems you tried to map the tunnel=culverts ?
way/272539578

Hi there!
I've changed maxspeed=2 to lanes=2.
Do you know the correct maxspeed value?
way/238699432

Hi there!
I've removed
maxspeed=2
from two roads. Do you know the correct value?
way/199928894
way/199928904

thanks for the quick feedback. There is a school in the middle, maybe someone was very careful ?

Hi there!
I've changed maxspeed=2 to lanes=2. OK?
way/183556081

Hi there!
Please check strange maxspeed values
maxspeed=2 / maxspeed=4 on these ways:
way/112517685,way 112517686,way 330726531,way 112517688,way 253986398,way 253986397,way 253986396
Also maxweight=0.3 looks wrong.

Hi there!
I've changed maxspeed=2 to lanes=2.
Maybe you know the correct maxspeed value?
way/290765718
way/80524845

Hi there!
maxspeed should give the maximum allowed speed, not the possible speed.

maxspeed должны указать ограничение скорости

Great! Thanks :-)

I am not a local, I don't know what's right or wrong. Bing shows two lanes, so I change it to that. Maybe you can find out the right name?

Hi there!
It seems you have added the "National Trail"
3 times at different positions, Also another way was duplicated. Please review
changeset/35685650
I also guess that the trail is much longer ?

Hi there!
I wonder if maxspeed=1 can be correct?
way/208420648

Hi there!
I've changed maxspeed=1 to lanes=1.
OK?
way/186961633

Hi there! Please check:
You have set maxspeed=1
on a tertiary road. Was that intended?
way/77746495

Thanks for the feedback.
I consider all values below 5 as
typos or mistakes or an unusual method to avoid that routers use the way, but maxspeed is also
used on railways, so one has to be careful.

You can never be sure what routers do.
If you think that the road is not usable
I suggest to map it as abandoned or disused. Depends on the reason for the bad status of the surface.

:-)
Still, maxspeed=* is used for the allowed speed, not the possible speed.