Hi Hermann!
I noticed that there are large residential areas in Vallée Du Zio. I wonder if this polygon is still up to date which would mean that all the buildings are in a hazard prone area.

Hi!
Please check: I've noticed this changeset because of the unusual tag highway=access.
Mapbox shows roads which look like highway=service to me.
This road is probably just a service=driveway without a name?
way/507644908
And this one probably is longer according to DigitalGlobe Standard Imagery:
way/435630077

Hi!
Sorry for this late comment:
I found nearly 3000 buildings with addr:street=Mkwajuni in this area
but no road with this name. What I found was this boundary:
relation/5525980
Do you agree that the addr:street tag is wrong here and should be removed?
The same problem exsts for other names in Dar es Salaam, e.g. Matokeo

Just noticed that you also removed name=Nelson Mandela Road, I fixed it here:
changeset/53121780

Hi!
Please review:
1) You changed a highway=primary to highway=Trunk. The correct value would be trunk
2) You removed oneway=yes from this road, I am pretty sure that it is a oneway road.
3) You added tags like Smooth=Good
or Smooth=Intermediate to some roads.
I assume you meant smoothness=good
/intermediate. Typically you only use lower case characters for the tag values.
See also smoothness=*#Smoothness
4) Are you sure that "Highway road" is the name of this road?
way/32741381
I don't think so. If you don't know the name, please don't invent one.
Hope this helps, happy mapping!
I have correct the trunk road here:
changeset/53121628

Hi
You added lots of buildings here which duplicated existing buildings.
I've reverted the change here:
changeset/53098833

Hi!
I've noticed this changeset because of the unusual tag highway=vehicletesting
which is only used in this area.
What do you think about changing it to highway=service + service=test_track.
This is used 30 times for similar roads and highway=service is rendered.
I assume all these roads should have access=private ?

Hi!
Please review:
Some roads in this area are mapped as highway="service road" instead of service and they are not connected to the other ways. They also have names like "dead end" or "Service Road" which seem to be fantasy names.
I also wonder if ways like way/127450076
should be mapped as path. The width seems to be ~4m. My understanding is that they are service roads to access the power towers/poles and that they are also used for hiking/cycling.

Please review my changes:
changeset/53090851

Moin!
Ich habe ein paar Korrekturen zu den Zebrastreifen gemacht, siehe
changeset/53088127

Hi Kurt,
your wiki page was recently changed to match this tagging, but I don't see where this was discussed. Some mappers in Germany (including myself) are very unhappy with this and you risk reverts by DWG. See also https://lists.openstreetmap.org/pipermail/imports/2017-October/005188.html

Hi!
Please review, I fear you accidentially moved a part of a major road by > 70m, see node/4778108925

Hi!
Please don't use tags like name=path for a highway=path or ref="Tertiary road"

Hi!
I've reverted this changeset:
changeset/53058680
Bing doesn't show the road as a straight connection. Why did you change it like that?

Hi!
Please review:
This way seems to describe the same object on the other side of the road?
way/4320792

Hi again!
Please can you add some details where this parking lot is located and who can use it? Sat images don't show it.
See amenity=parking

Hi and welcome to OSM!
You tried to map something here but I fear I don't understand what it is. Please check the wiki about highways: highway=*

Hi!
I see that you started to fix these strange numbers. I also want to do that. What do you think that addr:housenumber=KS (or ks / Ks etc) means?
Unfortunately most numbers don't have a valid addr:street tag. Do you see a good reason for this?

I wonder if the primary road is in a tunnel?
way/464661119
It seems to go straight through buildings with both lanes.

Hi!
I've noticed this change because you use highway=crossing on some ways. This tag should only be used for the node shared by the major road and the footway. The way itself should be tagged highway=footway + footway=crossing.
See also highway=crossing
You should also connect these footways with the minor roads as the major is a trunk road which doesn't allow pedestrians. An alternative would be that there is a sidewalk next to the trunk road, in this case you may map that with sidewalk=right and only tag the nodes.
I did not correct it myself because sat images don't show where the footways lead to.