A Study of the Interchangeability of Traffic Signal Systems Communication Hardware
Advanced Search
Select up to three search categories and corresponding keywords using the fields to the right. Refer to the Help section for more detailed instructions.

Search our Collections & Repository

For very narrow results

When looking for a specific result

Best used for discovery & interchangable words

Recommended to be used in conjunction with other fields

Dates
...

to

...
Document Data
Library
People
Clear All
...
Clear All

For additional assistance using the Custom Query please check out our Help Page

ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners. As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.
i

A Study of the Interchangeability of Traffic Signal Systems Communication Hardware



English
Details You May Also Like

Details:

  • Creators:
  • Corporate Creators:
    PRC Engineering
  • Contributors:
    Lavigne, Richard
  • Corporate Contributors:
    United States. Department of Transportation. Federal Highway Administration. Office of Research and Development
  • Subject/TRT Terms:
  • Resource Type:
    Tech Report
  • Right Statement:
    Public Domain
  • Geographical Coverage:
    United States
  • Edition:
    Final Report
  • Contracting Officer:
    Lavigne, Richard
  • Corporate Publisher:
    United States. Federal Highway Administration. Office of Research and Development
  • Abstract:
    The problem addressed by this study is centered around "manufacturer dependence or relying on a single source of supply for communication hardware equipment. This study was undertaken to determine the feasibility of establishing a preliminary standard for communication interfaces used in interconnected traffic control systems. The study concluded that a communication interface hardware standard would be a definite benefit to the users, while the manufacturers would not experience a significant benefit or disbenefit. It was also concluded that currently built communication equipment and techniques used for traffic control did not vary significantly in hardware design or modem characteristics and, therefore, it was feasible to develop a preliminary standard. The two major categories of controllers, Type 170 and NEMA, were considered as part of this study. Since the Type 170 controller already has a standard, the proposed standard applies only to NEMA communication interface hardware. The proposed standards are modeled after the NEMA Standards Publication TS-1 1983 with regard to environmental and operating characteristics, as well as electrical limits of input-output terminations. The essence of the proposed communication hardware standard is interchangeability. In order to accomplish this end, the proposed standard recommends using a set of connectors with specified pin-outs and functions. Functions are specified for basic dual ring control, detector processing, and standard cabinet functions such as flash. A list of expanded functions was identified in order to accommodate larger and more complex systems. The proposed standard was developed using a "modular by function" concept. A different type of connector has been recommended for twisted pair, coaxial and fiber optic cable. Data formats, message content, and line protocol are not covered by this standard.
  • Format:
    PDF
  • Funding:
    DTFH61-84-C-00037
  • Collection(s):
  • Main Document Checksum:
  • Download URL:
  • File Type:
    Filetype[PDF-3.04 MB]

You May Also Like

Checkout today's featured content at rosap.ntl.bts.gov