Hi and welcome to OSM!
I've corrected the mapping of a pedestrian crossing here:
changeset/53415101
The shared node of major road and footway is tagged with highway=crossing.
The footway itself is tagged with highway=footway + footway=crossing.
For both objects you may add e.g. crossing_ref=zebra (not sure if this matches here)
Please see highway=crossing

Hi!
I've corrected a highway=brdige here:
changeset/53415028

Hi 91301101,
it seems you stopped mapping after reading the above changeset comment. Now I wonder if there is a way to change your data so that it is useful for OSM. Since you did not correct it so far I think it would be better to remove it.

Moin!
Ich habe diese Änderung revertiert. Der Kreisverkehr wird durch junction=roundabout erfaßt und das tag highway=motorway_junction ist nur für nodes, siehe osm.wiki/DE%3ATag%3Ahighway%3Dmotorway_junction

I've done some corrections, please review my changes:
changeset/53200816

Hi mati-cl,
I see that you changed way/526879327 here, but I still don't see what it is.

Digital Globe seems to show a highway=track next to the rails. I assume this was meant with highway=yes?
If yes, draw the highway as an extra way.

Ok, please correct it and add a surface tag and remove the tag cycleway=yes..

Hi!
Please review typo highway=footpath on way/534238816
Is it a hw=path or hw=footway?

Ich seh das eher streng, kann aber damit leben ;-)

Hi and welcome to OSM!
I've noticed this changeset because you created a lot of short ways where the sat image shows one road. Please connect these parts. I think that this way way/534160181 can be reached with a car, so it is probably a highway=unclassified. You used name=carretera
I don't think that this is the name of the road, Please don't use the name tag to describe the object you are mapping.
Hope this helped and happy mapping!

Hi!
Please add / check the layer tags to the cycleway
way/25747077 between node/280779627 and node/3396499690.

Moin!
Bitte prüfen:
1) Tippfehler: Eine Zufahrt wird mit highway=service + service=driveway erfaßt:
way/533947934
2) Heißt das Ding wirklich genauso wie die L705 an der Stelle und wie diese Zufahrt:
way/109997787 ?
Etwas nördlich gibt es dann auch noch zwei hw=residential mit dem gleichen Namen.

Hi!
I've noticed this change because you used hghway=crossing for a way. Please review my corrections:
changeset/53146008

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