Are these really railway=abandoned? It doesn't look like there is any trace left on the ground, which might mean it doesn't belong in OSM. This information might be better for OpenHistoricalMap: https://www.openhistoricalmap.org/about

Hi there, and welcome to OpenStreetMap! Just a note, the convention in Washington, DC, and indeed throughout the United States, is that abbreviations are fully spelled out in the name= tag, so "M Street Northwest" is correct here, not "M St NW".

Just to follow up on this, I visited Glen Echo this weekend and it convinced me that it is definitely not currently a theme park by OSM definition. I think the wiki definition of amenity=arts_centre describes Glen Echo reasonably well as a venue for a variety of art exhibitions/performance spaces, so I retagged it as such, still dual-tagged with leisure=park.

Hi, it seems like you ignored the note= tag on node/4348916993, Mens is not a branch and men;women is wrong on this store. The iD validator is useful but please exercise care before blindly agreeing with it.

That is tagged with armrest=yes, dispensing=yes is usually for pharmacies

Why is dispensing=yes tagged on a bench?

The bookstore was already mapped, please check first before uploading a new object

Hi there, in this changeset you appear to have removed all the traffic controls (signals and stop signs) from the streets that intersect L St (e.g. Capitol, 1st St NE). If you are going to separate out the signals like this, which I find a little pointless but know isn't wrong per se, please make sure you replicate them in all directions.

Please don't attach landuse to roads like this. It makes it much harder to modify in the future and is not accurate. See osm.wiki/Land_use#Mapping_land_use_in_more_detail

Just FYI, Northampton St does not have a signal when it hits Connecticut, it has a stop sign as was mapped before. The crossing is a hawk signal. I corrected it here changeset/181274688

Hi there, thanks for updating all this data. I noticed in this changeset, and maybe in others, you've changed the heights from values typically around 10 to values about 3.25 times as large. Please note that in OSM, the default value for height is meters, not feet: height=*?uselang=en. So a height=31 value for a building implies it's 100 ft tall! Are you importing the values in feet?

Reverted in changeset/180739891

Out of curiosity (since I've often wondered about these etymologies) what was your source for these? Most seem at least plausible, although Kennedy St seems doubtful... way/996627037. I think the street was called that before JFK: https://cinematreasures.org/theaters/7498.

These days a source tag on the changeset itself rather than the OSM objects edited is sufficient, see source=* for some background. For instance, on your colleague's recent edit, changeset/179643467, source=survey;dashcam on the changeset is suitable, that information does not need to go on the way. For this edit, I do not think any gps data is your source, it's really just general knowledge about speed limit units in the US.

Is Glen Echo really currently a theme park? I don't think there are any rides except for the carousel, otherwise it's more of a cultural center. Maybe disused:amenity=theme_park?

Reverted in changeset/179653761. Feel free to re-add the camera, but be careful not to touch other ways if you don't mean to!

Hi, please be careful not to drag nodes and delete things unintentionally like this, your edits go live immediately. I am reverting this

Hi there, thanks for doing this check, it seems like these roads did need the mph in their speed limits. Can I ask what the source=gps is supposed to mean? It seems wholly unnecessary on the ways, and presumably not even true unless you are surveying each of these roads personally

This coffee shop is permanently closed, which is why it was marked as disused:amenity=cafe.

Fixed in changeset/178911475