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The story
Starting September 1, 2026, the legal speed limit on general roads that have no center line and no posted speed-limit sign will drop from 60km/h to 30km/h. This covers not just narrow residential streets but also unmarked roads where traffic actually flows at around 60km/h in practice, so 5channel threads lit up with people saying “I had no idea.” Posters also debated how blurry the line is on which roads actually qualify, and speculated about stricter enforcement once the change takes effect.
What people said
It's a "residential road" (a dead-quiet backwater road nobody's ever on)
Maybe it wasn't covered much in the news, but the police have been saying this all along
If you watch the news like a normal person you'd have seen it
This kind of thing doesn't even come up on the driving test
Any road that isn't a national or prefectural highway
TV commercials
TV news
Online news
YouTube ads
You'd know if you watched the news
Most of them probably already had 30km/h signs up, no?
Putting up new signs everywhere is a hassle, so they just flipped the default instead
It's the fault of idiots who figured "no sign means I can do 60"
My commute road is getting the 30km/h limit starting tomorrow too
Even a place like this is 30km/h!?
No cops ever come out here, so no problem
Getting caught out here would be scary in its own way
I'd assume it was a fake cop
Do it during the morning rush and make everyone late
The fact that they deliberately use "residential road," a term that isn't even in the law, feels like they're really saying "seriously, cut it out with the speeding on those roads"
People sometimes fly down those at 80km/h
This road along the Muko River levee (Amagasaki side)
During the morning commute you basically can't get away with less than 70km/h
Looks like the whole country's about to be covered in roads that fatten the national treasury (i.e., prime ticket-revenue farms)
Idiot: "Really? Guess I'll drive 30" (on a road that HAS a center line)
Expert driver behind them: "Why are you crawling along!?"
Idiot: "I got tailgated"
This'll probably keep happening for a while
I work for a homebuilder, and this came up at this morning's staff meeting
Barely anyone drives some ridiculous speed there even now
The real problem is roads like the one I posted
Doing 30 on a road like that is seriously rough
Guess you just gotta drive around 50 on the speedometer and play it by ear
If it's a spot where they can't even set up a speed trap, there's no way to enforce it anyway
Major roads already have their own set limits, so this really only affects narrow residential streets and low-traffic roads — barely any real-world impact
Exactly right
Narrow residential streets were never really "60km/h roads" to begin with
You physically can't drive that fast there anyway
Honestly online it's just people who don't normally drive, speculating out of pure imagination
So basically every road with no center line becomes 30km/h — is that right?
That's right, but
the thing is, roads without a center line vary wildly, from one extreme to the other
A lot of them were never places you could realistically do 60 anyway, and it's mostly people who don't actually drive citing those as their examples
The real issue is
roads that technically have no center line
but where traffic in practice actually flows at 60+ km/h
Those are the ones that are genuinely a headache
Nah, you'll get tailgated for that…
You're gonna get honked at nonstop, guaranteed
Item 2 here is the one for this change
It's just the obviously super-narrow roads that get the 30km/h limit
Though apparently my commute road, where I usually go Mach 5, counts too…
Background and key points of this story
This change stems from a revision to the Order for Enforcement of the Road Traffic Act on maximum speed limits, and it applies to roads that have neither a center line nor a posted speed-limit sign. In the thread, there was little pushback on the obvious cases, like narrow residential streets, but opinion split over roads like riverbank levees, where traffic in practice moves fast even though the signage hasn’t caught up. Some posts also showed misunderstanding of the scope, since “residential road” isn’t actually an official term under the Road Traffic Act — it’s just language the police use to explain the change to the public. The key detail is that the speed limit is determined by the road’s structure — specifically, whether it has a center line — not by how wide or narrow it looks or feels. So continuing to drive at the old 60km/h limit simply because no sign is posted could now put you in violation.
*This article is excerpted and summarized from the 5channel (Nandemo Jikkyo G) thread “[Sad News] Starting tomorrow, 70% of general roads get a 30km/h limit — I had no idea“.
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