Sorry, the first link should point to way/284665037

Hi. Many thanks for responding.

Although the adjacent one-way highway (https://drive.google.com/file/d/1ESxNP25bR-B3G4TK0aMroXGCrYQi8kw2/view?usp=sharing) bears the plain ref of "K308" - see https://drive.google.com/file/d/1ESxNP25bR-B3G4TK0aMroXGCrYQi8kw2/view?usp=sharing - I will treat "K308/1" as a unique reference code as it is.

To be honest, this is my only observation of a reference code appended with a forward slash so far.

Why the reference code of these have been amended slightly?

Check this photo I snapped on Friday (2020-08-22)
https://drive.google.com/file/d/1hrt3sKS64yaEUTRK7OOK6MgKPoCh7ind/view?usp=sharing

Also, I've been around Lebuh Armenian/Masjid Kapitan Keling late November 2019. Unless I'm dense, not realising there was a park full of greens, like, oh, wow! in the vicinity.

... and OpenStreetCam to aid observing the width of driveways. They are narrower than the typical residential highways, and usually not paved with asphalt

Ground truth from 2016 definitely screams an unclassified highway

https://osmlab.github.io/osm-deep-history/#/way/419055457

And way/272795236 is one-way traffic

Sorry, I mean traffic between way/272795236 and way/182655008

Really doubt to have way/822363096 mapped because traffic can only go in to/out from way/182655008 only

Are you really sure the street way/819689397

has all those properties, including reference code K682?

Some comments: roads around the area way/818672478

has individual house units (rather than a row of houses just nearby). I believe those are private, individual driveways; rather than interlinked residential highways.

I've already changed those.

https://pewu.github.io/osm-history/#/way/317619147

I'm really positive that way/317619147 is unnecessarily having all those zig-zags.

Check out GPS tracks made available publicly. I went through here on an underbone motorcycle, last November and managed to collect GPS tracks around this area:

https://cf.mastohost.com/v1/AUTH_91eb37814936490c95da7b85993cc2ff/enosmtown/media_attachments/files/000/116/099/original/a8f10274914c385b.png

Sources of street names... please state where did you get all these?

Машинный перевод:
Источники названий улиц... пожалуйста, укажите, откуда вы все это взяли?

Although what your team is mapping for consistency; sometimes, roads in these kind of purposely built housing estates would throw some kind of logic away.

Hello, thank you for your reply.

This is a recently built housing area (try to compare between nearby ones that re older), so more or less, the difference between a highway=residential and highway=service is stark.

P.S. Let me know if this is not a clear answer.

Sharp observation.

It might look so inconsistent, but I prefer if we stick to the ground truth.

Why it was upgraded into a tertiary highway?

Surely I've surveyed the highway itself (check History - Ctrl + H) from December 2019 and more recently from March 2020.

That way has a single lane and unlike any adjacent tertiary highways, it is narrower. Road K455 and K460 has two lanes and are wider.

I could show you photos with geo-coordinates later if you'd like to see what I mean.

Please compare the geometries between what was mapped as service highways and the more important residential highways.

Residential highways have two lanes separated by paint lines. Service highways are narrower and do not even have paint lines (suggesting a single lane).

Traffic would rather navigate through wider lanes rather than those narrow lanes.

No worries. I've taken clues from changeset/69598112

Машинный перевод:
Ничего страшного. Я читал от changeset/69598112