Signal Street is a Japanese online project focused on traffic signals and the community of people interested in them. It brings together informational and social services under one name, giving visitors different ways to explore traffic-signal content and connect with fellow enthusiasts.

Its Signal Light Wiki is a collaborative resource covering information about traffic signals. The site welcomes anyone to contribute edits, helping users share and develop knowledge about the subject. Signal Street also operates Shigunaru-suki, a social networking server for traffic-signal fans. Built on the decentralized Misskey platform, it provides a community-oriented space for members to interact. The site additionally points visitors to its Twitter account, now known as X.

As of November 10, 2025, Signal Street is managed by Haide and the Ginga Federation. The project invites feedback and suggestions by email, while directing users to the relevant service pages for individual inquiries. Signal Street presents its offerings as dedicated resources for learning about traffic signals and engaging with the enthusiast community.