Public Transportation

Welcome to 3-Ci, where engineering excellence meets tailored connectivity solutions for the public transportation sector. Backed by over 20 years of experience, we are a trusted partner in custom cable manufacturing and transportation harness assemblies—serving both industrial and commercial transit systems across North America.

Our in-house engineering capabilities ensure precise design and execution, supported by an extensive inventory, precision CNC machining, and advanced soldering, potting, and molding stations. As an ISO-certified and ASQ-certified cable assembly manufacturer, we go beyond production—supporting OEMs, distribution networks, and end-users with unmatched responsiveness and quality.

Whether for rail systems, electric buses, or infrastructure control panels, our Canadian cable solutions are built for reliability, durability, and compliance with IPC/WHMA-A-620 standards. We deliver performance where it counts, ensuring seamless integration into mission-critical public transit operations.

Let’s start a conversation. Partner with 3-Ci to blend legacy expertise with cutting-edge technology, and engineer a smarter, more connected future in public transportation.