From survey Dec 2024:
1204803423 maxspeed correct
1204803424 maxspeed correct, however you later split this to make the northern section maxspeed 80 (that section was actually still maxspeed 50 - I've fixed that at changeset/161744124
144878875 maxspeed correct (although I only surveyed the southern section)
565583771 has no speed zone sign, so is presumably the same maxspeed as the intersecting road (maxspeed 80 rather than 100). NSW Speed Data has maxspeed 100, but with the type 'default' (¿indicating that this might not have had it's actual maxspeed entered into the NSW database?)

1204803424 is maxspeed 50, but 1205091751 is incorrect - this section is also maxspeed 50 (not 80) - change of speed zone is further to north

This road was signposted as maxspeed 20 at my survey in 2012, and still signposted as maxspeed 20 at repeat survey in Dec 2024. NSW Speed Data has incorrect information here.

From survey Dec 2024:
29311904 is maxspeed 100, apart from the last section near Thunderbolts Way which is maxspeed 80. Updated at changeset/161744124
206503937 maxspeed correct
794414148 confirmed maxspeed is 100 (not 110). Previously fixed by me at changeset/152679782
334304805 and 452415072 not checked yet

I resurveyed this road Dec 2024 - entire road is maxspeed 80 (not 100) apart from last 100m near highway

I surveyed this section of Princes Hwy at Narooma in Nov 2024 as maxspeed 50.

I surveyed this section in November 2024 (following completion of the road realignment here).
Ways 391177428, 391177410 previously tagged as 90 prior to roadworks, is now 90 again.
Ways 16826206, 16826285, 5457954 maxspeed is correct

in mid-2024 I had surveyed Cooma Street / Old Cooma Road as maxspeed 50 (had presumably previously been 60).

In mid-2024 I had surveyed (from Farrer Place to the roundabout with Yass Road / Ellerton Drive) as maxspeed 50. I didn't check the section east of the roundabout on that trip.

in mid-2024 I had surveyed Canberra Avenue and Farrer Place as maxspeed 50 (had presumably previously been 60).

in mid-2024 I had surveyed Lanyon Drive as maxspeed 50 (had presumably previously been 60).

in mid-2024 I had surveyed Ellerton Road as maxspeed 50 (had presumably previously been 60).

in mid-2024 I had surveyed Yass Road as maxspeed 50 (had presumably previously been 60).

In mid 2024 I had surveyed these as maxspeed 50 (I assume it had been maxspeed 60 previously)

Hobbys Yards Road (28868087), as well as adding a maxspeed, you've added ref=B64 (route number for Mid Western Highway). The southern section entering Trunkey Creek is likely to be maxspeed 50 (would need survey).

In 2021, I surveyed this section having different maxspeeds in each direction. Assuming this is still the case, your edit here is confusing (implying the same speed each way).

Shiralee Road 1151952972 - maxspeed was reduced from 80 to 50 in 2023. NSW Speed Data currently has (incorrectly) 60.
Bylong Valley Way (145555798) maxspeed was reduced from 80 to 70 in 2023. NSW Speed Data currently has 70.
Are you using an out-of-date version of NSW Speed Data?

It's been a while since I've been there, but the Shell / Coles Express stations seem to have consistent signage, with the Shell logo on top, and Coles Express below this (I've generally used Shell for amenity=fuel, and Coles Express for the associated convenience store). I looked at the Bathurst Shell/Coles Express today on the way to work, and this is how it is signed. Google images (not a valid source!) show similar signage in Port Macquarie. Hope that helps.

I've just reverted this changeset - see changeset/161665924.

1. The maxspeed through Nimmitabel had been previously changed at changeset changeset/108249041 with comment "Updated road to new posted speed of 50km/h (from 60 km/h)" (implying an official maxspeed change in or prior to July 2021)
2. When I travelled through Nimmitabel in November 2024, the road was signposted maxspeed 50.
3. Many of your other edits have been "based on NSW Speed Data". You didn't state the source of your edit for this changeset (despite me asking you twice), but if you did, the maxspeed on the NSW Speed Data map is currently 50 (not 60).
4. Your edit left a 200m section of the highway at maxspeed=50 (implausible)

For your information, I have noticed some errors in the maxspeeds on the NSW Speed Data Map, so it's probably best not to rely on this as a data source. Another user in the last few years was using this data source, with mixed results (some were correct, but some were not).

Confirming that maxspeed is correct here (checked on survey)