This committee is responsible for maintaining current knowledge of clearances required by law or regulation in each of the political entities through which the member roads of the Association of American Railroads (AAR) operate and making this knowledge readily available to members of the AAR. They are also responsible for publication of clearance diagrams defining clearances required by various AAR interchange rules and developing procedures to protect the movement of excessive dimension or overweight loads.

Ballots:

• Ballot #28-08-02, Chapter 28, Table on Primary Maintenance Procedures or Installation that can Adversely Affect Clearances
  • Subcommittee D-10-04 Report for Fall 2008 Meeting in Phoenix AZ.doc
  • Tabular Format Maintenance Procedures that can Affect Clearances.xls

• L-Kopia Load Measurement Device

• Description of LKopia Clearance Measurement system
• Frontal Photo of LKopia Frontal photograph of LKopia Hi-Rail Vehicle

Members of Committee 28 at demonstration of L-Kopia's latest
generation laser clearance measuring system during the
Spring 2006 meeting in Jacksonville, FL

Next Meeting:

• February 27-28, 2008 - Brunswick, GA
• Agenda for February 2008 Meeting

Meeting Minutes:

• Fall 2007 Minutes
• Spring 2007 Minutes
• Fall 2006 Minutes
• Fall 2005 Minutes
• Spring 2005 Minutes
• Fall 2004 Minutes
• Fall 2003 Minutes

Link to RICA Website:www.rica.org

Sub-Committee A: Recommendations for Further Investigation and Research. Sub-Committee B: Revision of Manual.

C-1-62: Compilation of the Railroad Clearance Requirements of the Various States. Ongoing assignment.

C-2-85: Compilation of a comprehensive glossary and bibliography pertaining to the technical literature on railroad high and wide clearances. Ongoing assignment.

C-4-85: Equipment Diagrams and Ratings.Ongoing assignment.

C-6-89: EDI/Web page development and maintenance.  Ongoing assignment

C-8-94: Research and develop any new methods for measuring clearances, particularly means of measuring high/wide loads at interchange points. Ongoing Assignment.

D-8-94: Maintaining existing clearances. Ongoing Assignment.

D-10-97: Study car behavior and recommend tolerances between various types of equipment and obstructions at different speeds. Identify all factors involving tolerances. Completion date is unknown at this time.

D-11-99: Parameters for Handling High Combined Center-of-Gravity Loads. Completion date is unknown at this time.

D-10-04: Identify clearances critical structures and procedures and events that can alter clerances.  Ongoing Assignment.

D-12-04: Identify clearance critical structures and the activities that could potentially reduce clearance at each structure. Ongoing Assignment.