# Quarterly Rail Cost Adjustment Factor
**AGENCY:**
Surface Transportation Board, DOT.
**ACTION:**
Approval of rail cost adjustment factor.
**SUMMARY:**
The Board has approved the fourth quarter 2006 rail cost adjustment factor (RCAF) and cost index filed by the Association of American Railroads. The fourth quarter 2006 RCAF (Unadjusted) is 1.250. The fourth quarter 2006 RCAF (Adjusted) is 0.591. The fourth quarter 2006 RCAF-5 is 0.562.
**DATES:**
Effective Date: October 1, 2006.
**FOR FURTHER INFORMATION CONTACT:**
Mac Frampton, (202) 565-1541. [Federal Information Relay Service (FIRS) for the hearing impaired: 1-800-877-8339.]
**SUPPLEMENTARY INFORMATION:**
Additional information is contained in the Board's decision, which is available on our Web site *http://www.stb.dot.gov.* To purchase a copy of the full decision, write to, e-mail or call the Board's contractor, ASAP Document Solutions; 9332 Annapolis Rd., Suite 103, Lanham, MD 20706; *e-mail [email protected]* ; phone (202) 306-4004. [Assistance for the hearing impaired is available through FIRS: 1-800-877-8339.]
This action will not significantly affect either the quality of the human environment or energy conservation.
Pursuant to 5 U.S.C. 605(b), we conclude that our action will not have a significant economic impact on a substantial number of small entities within the meaning of the Regulatory Flexibility Act.
By the Board, Chairman Nottingham, Vice Chairman Mulvey and Commissioner Buttrey.
September 14, 2006.
Vernon A. Williams,
Secretary.