Q-Free Traffic Signal and Corridor Management
Q-Free Traffic Signal and Corridor Management

ATC Controllers

Advanced traffic signal controllers for powerful intersection control. Meet edge computing and IOT demands at the roadside.

  • Fast, reliable intersection control
  • Schedule updates or run live
  • Install updates without putting the intersection in flash


Traffic signal controllers are the workhouse of signalized intersections. Based on open standards and built on a Linux platform, Q-Free ATC controllers (advanced transportation controllers) are ideal for traffic signal operations and set the scene for the connected world.

ATC controllers have an open architecture platform that organizes and improves traffic signal operations. Leveraging the ATC API, our ATC controllers support multiple applications on the same device. This improves app integration and reduces the amount of equipment in traffic control cabinets.

ATC controller models

Our traffic signal controllers meet or exceed US-based Caltrans (2070) and NEMA specifications. Each ATC controller comes standard with 120 VAC power. However, 220 VAC and 48 VDC are available to meet alternate power requirements.

Every Q-Free ATC Controller comes standard with:

  • On-board web server
  • Linux operating system
  • Unrestricted use license for NTCIP MIBs for Q-Free’s MAXTIME ic
  • Standard with Velocity™ ARM processor for AI-enabled edge computing
  • Legacy PowerPC processors available
  • ATC application programming interface

Just looking to replace parts or upgrade your existing 2070 controllers? Check out our available 2070 controller modules.

ATC 2070 Controllers

2070LX Controller2070LDX Controller
(H x W x D)
7” x 19” x 12”
17.75 x 48.25 x 30.5cm
7” x 19” x 12”
17.75 x 48.25 x 30.5cm
Form Factor:19″ rack mount19″ rack mount
Display:8 line x 40 character LCD display16 line x 40 character LCD display

ATC NEMA Controllers + Specialty

XN NEMA ControllerXN-1XN-2
(H x W x D)
Rack Mount
7” x 18.8” x 7.8”
17.8 x 47.8 x 19.8 cm

Shelf Mount
7” x 13.4” x 7.8”
17.8 x 34 x 19.8 cm
Shelf Mount
10.3” x 13.4” x 8.5”
26.2 x 34 x 21.6 cm
Form Factor:Shelf or 19″ rack mountShelf mount
Display:128 x 256 pixels OLED display128 x 256 pixels OLED display
Request more information

Product specifications may change at any time without notice and may not be available in all markets. Contact us for up-to-date information and availability.

Kinetic Signals

Unleash the power of regional traffic signals management.


Coordinate efficient local traffic signal operations.


Enable communication between infrastructure and CAVs.