Journal
Notes on the rules behind road maintenance in Japan and on image recognition, from research and experiments.
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Technology
Detecting potholes with AI from a smartphone mounted in a car
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Technology
Detecting road signs with AI and sorting them into five types
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Technology
Detecting curve mirrors with AI in images taken while driving
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Philosophy
What AI can do for civil infrastructure, so what we have today lasts
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Technology
Where can't a snowplow throw snow? Finding small roadside signs with AI
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Road basics
How to find a kilometer post's latitude and longitude, and why national roads and expressways differ
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Road basics
What is an expressway kilometer post? And why both directions show the same number
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Technology
Can published AI models be used for road inspection? Why evaluation numbers don't always carry over to the field
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Road basics
What types of asphalt are used on roads? And why some pavement lets water through on purpose
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Technology
What to decide before ordering image detection AI, and why performance is hard to guarantee in a contract
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Rules and procedures
Can you fill a hole in the road yourself? Why public roads need approval even at your own cost
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Rules and procedures
National, prefectural or municipal road: how do you tell? And why some national roads are run by prefectures
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For local governments
What are Japan's Pavement Inspection Guidelines? And why pothole response is left out
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Road basics
Potholes vs road collapses: why voids turn up under roads rated "sound"
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Rules and procedures
A pothole gave me a flat tyre. Will I be compensated? Why the share of fault matters
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Road basics
What are the gutters and white lines at the edge of the road for? Why the space outside the same line can be a roadside strip or a shoulder
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Road basics
Yellow lines vs white lines on Japanese roads, and why the same yellow means different things
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Road basics
Why do potholes form? And why there are more in early spring than in the coldest month
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Rules and procedures
Who do you contact when you find a hole in the road? Why the same national road can have different contacts
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