渋滞フロー

You can generally tell when a traffic jam will end by knowing "when it started."
This app lets you see not only the "current" situation but also "what about that time?" at a glance.

【What is Traffic Flow?】
In addition to the current traffic situation, you can also view past traffic conditions using the time bar.
This app allows you to easily check road congestion and traffic regulation information for all of Japan on a map.
This app lets you see the "flow of traffic" both now and in the past.

【Main Features】
■ Map Display of Traffic Information
Displays road congestion status on a map. You can grasp the congestion situation at a glance.

■ Display of Traffic Regulation Information
Traffic regulation information such as road closures can also be checked on the map.

■ Check Past Situations with Time Bar
By operating the time bar on the screen, you can check past congestion and regulation situations.
Convenient for checking "what it was like at that time."

■ Date Navigation/Calendar
Checking across days is also smooth. You can select a date from the calendar to check past traffic conditions.

■ Current Location Display
By granting permission for location information, your current location will be displayed on the map, and you can move the map to your current location.
Location information is used for display on your device and is not transmitted to our servers.

■ Map Display Switching
You can switch the map display mode to view it in a more convenient way.

■ Historical Data
You can view traffic congestion and restriction data from June 26, 2026, 05:00 onwards.

【Recommended for those who:】
・Want to check traffic conditions before commuting or going out
・Want to research past traffic congestion patterns
・Want to check the impact of traffic restrictions on a map
・Want to plan drives and trips

【About Usage】
・This app covers traffic information within Japan.
・No account registration is required.
・Viewing older information may require viewing reward ads.
・Advertisements are displayed within the app.

【About Location Information】
We only request permission for location information when using the current location display function.
You can view traffic congestion and restriction information on the map even without permission.

[Data Sources]
Traffic congestion and restriction data primarily utilizes data from TomTom, which distributes traffic probe data.
https://www.tomtom.com/
We also comprehensively utilize the following data distributed on various other sites:
* OpenTraffic v2
* HERE Real-time traffic
* OpenStreetMap road data
* Ministry of Land, Infrastructure, Transport and Tourism: Traffic Volume API
* Ministry of Land, Infrastructure, Transport and Tourism: National Land Numerical Information Download Site | Expressway Numbering
* Geospatial Information Authority of Japan: Topographic and Road Data
* Social Infrastructure Information Distribution Promotion Council Secretariat: G-Space Information Center
* Public Transportation Open Data: ODPT

[Inquiries and Privacy]
Privacy Policy: https://sites.google.com/view/trafficjam-flow/privacy

* The displayed traffic information is based on distributed data. It may differ from actual road conditions. Please refrain from operating the device while driving.