ITS Cabinet (ATC 5301 V02)

History

Beginning in 2008, a Systems Engineering Process (SEP) was underway to develop the ITS Cabinet Version 2 standard (known as V2) from the User Needs workshop of ITS owner/operators held in Austin TX. Prior effort resulted in the completion of User Needs, Concept of Operations, Requirements and High Level Design before the project was suspended at ID 50 (Develop Design Content) of the Project Management Plan (PMP).

In September 2015, the project was restarted to complete the remaining tasks of the original PMP, but with updated milestone dates.. The ITS cabinet working group, operating under the direction of the ATC Joint Committee, will be holding working group meetings and teleconferences to complete this work. Siemens Industry Inc. has been retained under contract to ITE to provide consultant services to the working group for preparation of the V2 standard. This remaining effort picked up the prior work completed by ConSysTec (Bruce Eisenhart), Pillar Consulting (Ralph Boaz), and Adaptive Solutions, Inc. (James Kinnard) at Develop Design Content (ID 51) of the PMP, through the completion of the V2 standard.

Published ATC 5301 v02

Welcome the next generation Advanced Transportation Controller Cabinet Standard (ATCC), a USDOT-supported, jointly developed standard by American Association of State Highway Transportation Officials (AASHTO), Institute of Transportation Engineers (ITE) and National Electrical Manufacturers Association (NEMA).

The new ATCC sets a new benchmark for compact, low power, efficient operation; it has revamped the internal subassemblies using the latest proven technology for more efficient and reliable operation while assuring interchangeability for the subassemblies.

While previous specifications for cabinet assemblies were tailored to the now banned USDOE high power incandescent indications, technologies have evolved allowing the use of ultra-low power LED traffic signal indications.

The new designed ATCC includes advanced monitoring features focused on the low current signal displays, high-density load switches, efficient power supplies, and backward compatibility for devices such as input cards.  The ATCC is offered in both a high voltage (120 VAC) and low voltage (48 Volt DC) operation for lower and safer voltage field wiring.  The ATCC is designed to work with the Advanced Transportation Controller (ATC Standard 5201) using a serial interface between the controller and the cabinet assemblies.  The ATCC offers interchangeable subassemblies and a variety of cabinet constructs to handle simple intersections to complex roundabouts and diamond interchanges, while allowing ease of maintenance with standardized electrical signals and protocol. The ATCC has been proven in field designs available from a number of vendors.            

This ATCC standard v02.02 replaces ATCC Standard v01.02.17b and is jointly owned and approved by AASHTO, ITE and NEMA. This standard is recommended for all new deployments and upgrades. The use of previous version (v01.02.17b) is not recommended for new deployments

Key Elements:

 ATCC addresses critical needs received from infrastructure owner/operators including:

• Purpose-built for light-emitting diode (LED) signals
  • Conforms to the USDOE ban on incandescent bulb sales
  • Provides precise measurement of load current to identify individual signal head and wiring failures
• Significant power savings enables the use of alternate power sources, such as solar and battery backup
• Standard alternative to mercury relays, conforming to EPA mercury waste regulations
• Standard interchangeable plug-in devices among manufacturers
• Standard electrical signals and protocols among cabinet types to simplify service personnel training
• Mechanical size, shape and internal layout adapts to local owner/operator specifications
• Low voltage option for state legislation and safety of service personnel, pedestrian and drivers
  • Elimination of shock hazard inside electrical cabinets and downed field wiring
  • Elimination of arc flash hazard under NFPA 70E
  • Replacement of internal assemblies while traffic signals remain in FLASH

Participation

We are soliciting help from the community at large in this effort and stress that this is an open standards development process; input from any and all interested parties/stakeholders including manufacturers, public agencies, and integrators and consultants is welcome and requested. Please contact Mr. Siva Narla (snarla@ite.org) for additional information or to be placed on the email list for this working group.

The current working group roster is posted below and includes representatives from all of the stakeholder groups. However, we welcome participation at meetings, teleconferences, and document reviews from any and all interested parties. We will post a schedule of planned activities as they are determined and invite anyone interested to attend meetings and teleconferences. Please keep in mind that by necessity, we need to know if you wish to attend meetings so that we ensure adequate meeting facilities. In most cases, favorable hotel rates are also available to meeting attendees. If you wish to attend any face-to-face meeting, please inform Mr. Siva Narla (snarla@ite.org) so that we can make appropriate arrangements. Everyone is welcome and will be afforded an opportunity to actively participate in this effort.

• ITS Cabinet Working Group Members List
• ATC Joint Committee and Interested Parties
• Join the Standards discussion groups on ITE Community

Tracking ITS Cabinet (ATC 5301 v02) by the Project Plan