Connect Japan Road Traffic Volume to Gemini Enterprise
Query Japan Road Traffic Volume directly from Gemini Enterprise. Arlet links the two through one MCP connection and takes care of API keys.
This server connects your AI client to the Traffic Volume API, operated by the Japan Road Traffic Information Center (JARTIC) for the Ministry of Land, Infrastructure, Transport and Tourism (MLIT). It serves directional vehicle counts measured by roughly 2,600 permanent traffic counters (loop/ultrasonic and CCTV-AI counters), mainly on national routes (δΈθ¬ε½ι).
Key features:
- Query by bounding box and observation time (JST), at 1-hour or 5-minute aggregation.
- Each observation point returns its coordinates, point code, and up/down direction counts split into small vehicles, large vehicles and unclassified, with missing-data flags.
- Retention: about 3 months for hourly values, about 1 month for 5-minute values.
Usage notes: the values are reference values, not official MLIT survey results, and the terms of use require the attribution shown in every response (this server includes it automatically). Query area per request is capped to roughly a city-sized bounding box to respect the API's fair-use rules.
How to connect Japan Road Traffic Volume to Gemini Enterprise
- 1
In the Arlet dashboard, open Data tools, find Japan Road Traffic Volume and switch it on. No API key setup is needed.
- 2
Sign in to Gemini Enterprise with your organization Google account and open the gear icon at the bottom left β Connectors β Add MCP Server.
- 3
In the MCP info tab, enter https://mcp.arlet.dev/mcp/ as the Server URL and "Arlet" as the Name. In the Auth tab, enter the OAuth settings from the Arlet docs (Authorization URL / Token URL / Client ID / Client Secret / Scopes) and click Add.
- 4
In the connector list on the chat screen, click Connect on Arlet, sign in with Google and authorize. Arlet can then be enabled with the toggle.
Adding custom connectors (MCP) requires a Gemini Enterprise subscription and is not available in the consumer Gemini app. See the docs for the values to enter in the Auth tab.