Resources

Advanced Transportation Controller (ATC)

The Advanced Transportation Controller (ATC) Standards are intended to provide an open architecture hardware and software platform that can support a wide variety of Intelligent Transportation Systems (ITS) applications including traffic management, safety, security and other applications. The ATC Standards are being developed and maintained under the direction of the ATC Joint Committee (JC) which is made up of representatives from the American Association of State Highway and Transportation Officials (AASHTO), the Institute of Transportation Engineers (ITE), and the National Electrical Manufacturers Association (NEMA).

The Advanced Transportation Controller Standard (ATC Standard) is one of the four standards of the ATC family of standards. The ATC Standard provides a powerful, on-street, computing platform for numerous ITS applications intersection control, ramp metering, data collection, safety, security and other applications. It uses a transportation controller architecture where the computational components of the controller reside on a single small printed circuit board (PCB), called the “Engine Board,” with standardized connectors and pinout. It is made up of a central processing unit (CPU), Linux operating system (O/S), memory, external and internal interfaces, and other associated hardware necessary to create an embedded transportation computing platform. The Engine Board plugs into a “Host Module” which supplies power and physical connection to the input/output (I/O) facilities of the controller. While the interface to the Engine Board is completely specified, the Host Module may be of various shapes and sizes to accommodate innumerable transportation controller designs and cabinet architectures. The ATC Standard works together with the Application Programming Interface (API) Standard to allow application programs to share the resources of the controller and the transportation field cabinet system.

ATC 5201 Standard v06 represents a significantly improved and clarified document over ATC Standard 5.2b. There were 303 comments submitted and adjudicated by the Controller WG in the development of ATC 5201 Standard v06. This provided valuable feedback in identifying areas of ATC Standard 5.2b that needed correction, further definition or enhancement. Specific areas where the standard was enhanced are as follows:

  1. Additional front matter and context material was added to help users of the standard;
  2. Provisions were made for optional Secure Digital (SD) card and controller area network (CAN) bus interfaces;
  3. CoreMark benchmarks are now used as a measure of central processing unit (CPU) performance;
  4. User interface elements and their physical locations on ATC units have been clarified;
  5. Synchronous serial port features that have been unused by the industry are now optional;
  6. Both Model 2070-like communications expansion slots are now optional; and
  7. Memory sections of the standard were clarified and rewritten to not be overly restrictive on the types of memory technology used.

Other standards within the ATC program include the Model 2070 Standard, the ATC API, and the Intelligent Transportation Systems (ITS) Cabinet Standard.

 

ATC 5201 Standard v06A Maintenance Update

ATC 5201 Standard v06.25 was published as a Jointly Approved standard of the ATC JC on January 12, 2018. It was completed approximately a year prior but was delayed due to an appeal that was later rescinded. During the process of the appeal, a maintenance effort was started that would become ATC 5201 v06A.35. Comments were solicited from the Controller Working Group (WG), a technical subcommittee of the ATC JC. Its membership is made up of members from state and local transportation agencies, manufacturers, software developers and consultants. There were 57 comments submitted. Of those 57, 54 comments were adjudicated and closed. There were 3 comments that remained on the list that could not be closed due to the scope of the effort at the time. Later during the development, User Comment Draft (UCD) ATC 5201 Advanced Transportation Controller Standard Version 06.32 (ATC 5201 v06.32) was produced and distributed to the SDOs. Based on this UCD, 29 comments were submitted (included the three previous unresolved comments) and adjudicated by the Controller WG. Both sets of comments provided valuable feedback in identifying areas of ATC Standard 5201 06.25 that needed correction, further definition or enhancement.

The improvements to the standard are mainly corrections and additions focused on removing ambiguities and barriers to software portability and hardware compatibility. There are also increases to memory sizes and to the minimum Linux kernel version to be more contemporary. ATC 5201 v06A.35 represents an improved and clarified document over ATC 5201 v06.25.

The Controller WG submitted ATC 5201 Standard v06A.35 to the ATC JC for review as a Proposed Recommend Standard (pRS). The ATC JC accepted the document as a Recommended Standard during their teleconference on June 20, 2019 with a vote of 8 yeas, 0 nays, and 0 abstentions.

 

SDO Process Step Status Start End
ATC 5201 Advanced Transportation Controller Standard v06A (v06A.37) | PDF Completed 09/03/19 07/29/20

Notice of Intent to Adopt ATC 5201 Standard v06A

  • Notice of Intent to Adopt I PDF
  • Standard Development Report for ATC 5201 v06A PDF | Word
  • Recommended Standard ATC 5201 v06A PDF | Word
  • User Comments on UCD ATC 5201 Standard v06.32 PDF
  • Controller Working Group Comments on ATC 5201 v06.25 PDF
  • ATC Joint Committee Web Conference Notes 06/20/19 PDF
Completed 01/17/20 02/21/20

User Comment Draft (UCD)

  • Standard Development Report (SDR) for UCD ATC 5201 v06.32  PDF | Word
  • User Comment Draft (UCD) ATC 5201 Standard Version 06.32  PDF | Word
  • Comments on ATC 5201 v06.25 adjudicated during this development PDF | XLSX
  • Comment Submission Form for ATC 5201 v06.25  XLXS
  • ATC Joint Committee Web Conference Notes 06/21/18  Word
Complete
05/09/18
07/18/18

 

Tracking ATC 5201 v06 by the SDO Process

(For complete details on the steps of the Standards Development Process please click here.)

Step No.
SDO Process Step
Status
Start Date
Completion Date
13

Jointly Approved Standard

  • ATC 5201 Advanced Transportation Controller Standard v06A (v06A.37) | PDF
  • ATC 5201 Advanced Transportation Controller Standard v06 (v06.25) (incl. 508 Compliance)  PDF
  • ATC 5201 Advanced Transportation Controller Standard v06 (v06.25)   Word

 

 

Completed

 

 

Complete

 
 
2/22/20
 
 
 
 
12/04/17
 
 
7/29/20
 
 
 
 
01/12/18
12

Notice of Intent to Adopt

  • Notice of Intent to Adopt Word | PDF
  • Recommended Standard ATC 5201 v06 Word | PDF
  • Standard Development Report for ATC 5201 v06 Word | PDF
  • Comment Disposition Report for ATC 5201 v06 Word | PDF
Complete 10/03/15
12/04/17
9-11

Recommended Standard

  • WGD ATC 5201 Standard v06.23 (changes committed) PDF | Word
  • WGD ATC 5201 Standard v06.23 (tracked changes) Word
  • Comment Disposition Report on UCD ATC 5201 Standard v06.10 PDF
Complete 08/28/15
10/03/15
8

Comments Report

  • Controller Working Group Teleconference Notes 08/28/15 Word | PDF
  • WGD ATC 5201 Standard v06.22 (changes committed) PDF | Word
  • WGD ATC 5201 Standard v06.22 (tracked changes) Word
  • WGD ATC 5201 Standard v06.21 (changes committed) PDF | Word
  • WGD ATC 5201 Standard v06.21 (tracked changes) Word
  • Controller Working Group Teleconference Notes 07/16/15 Word | PDF
  • Controller Working Group Teleconference Notes 07/15/15 Word | PDF
  • WGD ATC 5201 Standard v06.20 (changes committed) PDF | Word
  • WGD ATC 5201 Standard v06.20 (tracked changes) Word
  • Comment Disposition Report on UCD ATC 5201 Standard v06.10 PDF
  • Comment Entry Form for WGD ATC 5201 v06.20 XLS
  • Controller Working Group Teleconference Notes 01/29/15 Word | PDF
  • Controller Working Group Teleconference Notes 01/20/15 Word | PDF
  • Controller Working Group Teleconference Notes 01/07/15 Word | PDF
  • Controller Working Group Teleconference Notes 12/18/14 Word | PDF
  • Controller Working Group Teleconference Notes 12/05/14 Word | PDF
  • Controller Working Group Teleconference Notes 11/21/14 Word | PDF
  • Controller Working Group Teleconference Notes 10/23/14  Word | PDF
  • Controller Working Group Teleconference Notes 10/09/14  Word | PDF
  • Controller Working Group Teleconference Notes 09/04/14  Word | PDF
  • Controller Working Group Teleconference Notes 08/19/14  Word | PDF
  • Controller Working Group Teleconference Notes 07/31/14  Word | PDF
  • Controller Working Group Teleconference Notes 07/15/14  Word | PDF
  • Controller Working Group Teleconference Notes 06/27/14  Word | PDF
  • Controller Working Group Teleconference Notes 06/12/14  Word | PDF
  • Controller Working Group Teleconference Notes 05/16/14  Word | PDF
  • Controller Working Group Teleconference Notes 04/23/14  Word | PDF
  • Controller Working Group Teleconference Notes 04/03/14  Word | PDF
  • Controller Working Group Teleconference Notes 03/19/14  Word | PDF
  • Controller Working Group Teleconference Notes 03/07/14  Word | PDF
  • Controller Working Group Teleconference Notes 02/19/14  Word | PDF
  • Controller Working Group Teleconference Notes 02/05/14  Word | PDF
  • Controller Working Group Teleconference Notes 01/22/14  Word | PDF
  • Controller Working Group Teleconference Notes 12/17/13  Word | PDF
  • Controller Working Group Teleconference Notes 11/21/13  Word | PDF
  • Controller Working Group Teleconference Notes 11/08/13  Word | PDF
  • Controller Working Group Teleconference Notes 10/31/13  Word | PDF
  • Controller Working Group Teleconference Notes 10/24/13  Word | PDF
  • Controller Working Group Teleconference Notes 10/10/13  Word | PDF
  • Controller Working Group Teleconference Notes 09/17/13  Word | PDF
  • Controller Working Group Teleconference Notes 08/29/13  Word | PDF
  • Controller Working Group Teleconference Notes 08/14/13  Word | PDF
  • Controller Working Group Teleconference Notes 07/24/13  Word | PDF
  • Controller Working Group Teleconference Notes 06/26/13  Word | PDF
  • Controller Working Group Teleconference Notes 06/13/13  Word | PDF
  • Controller Working Group Teleconference Notes 05/30/13  Word | PDF
  • Controller Working Group Teleconference Notes 05/15/13  Word | PDF
  • Controller Working Group Teleconference Notes 05/01/13  Word | PDF
  • Controller Working Group Teleconference Notes 04/16/13  Word | PDF
  • Controller Working Group Teleconference Notes 04/03/13  Word | PDF
  • Controller Working Group Teleconference Notes 03/20/13  Word | PDF
  • Controller Working Group Teleconference Notes 03/07/13  Word | PDF
Complete 09/24/12 08/28/15
6-7

Solicit Comments on UCD

  • ATC 5201 v06.10 Standard Development Report
  • ATC 5201 v06.10 ATC Standard
  • Adjudicated User Comments on ATC Standard 5.2b PDF | Word
  • SDR Package (ATC 5201 v06.10 SDR, ATC 5201 v06.10 and Comments on ATC Standard 5.2b ZIP
Complete
07/30/12
09/24/12
5

User Comment Draft (UCD)

  • ATC 5201 User Comment Draft (UCD) Advanced Transportation Controller (ATC) Standard Version 06.10
  • ATC 5201 Proposed User Comment Draft (pUCD) Advanced Transportation Controller (ATC) Standard Version 06.09 PDF | Word
Complete
03/30/12
07/30/12
4

Working Group Drafts (WGDs)

  • ATC 5201 Proposed User Comment Draft (pUCD) Advanced Transportation Controller (ATC) Standard Version 06.09 PDF | Word
Complete
2010
03/30/12

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