Skip to Content

Proposed Rule

Consumer Information Regulations; Federal Motor Vehicle Safety Standards; Rollover Prevention

Document Details

Information about this document as published in the Federal Register.

Published Document

This document has been published in the Federal Register. Use the PDF linked in the document sidebar for the official electronic format.

Start Preamble


National Highway Traffic Safety Administration (NHTSA), DOT.


Extension of comment period.


This document grants a request by the Alliance of Automobile Manufacturers to extend, for 30 days, the comment period on the agency's request for comment on the proposal to include ratings for rollover resistance in the New Car Assessment Program.


The comment period will close on August 30, 2000.


Comments should refer to Docket No. NHTSA-2000-6859 and be submitted to: Docket Management, Room PL-401, 400 Seventh St, SW, Washington, DC 20590. Docket room hours are from 10:00 a.m. to 5:00 p.m., Monday through Friday.

Start Further Info


Gayle Dalrymple, Office of Crash Avoidance Standards 202-366-5559 or by FAX to 202-493-2739. The mailing address is National Highway Traffic Safety Administration, NPS-23, 400 Seventh St, SW, Washington, DC 20590.

End Further Info End Preamble Start Supplemental Information


On Thursday, June 1, 2000, NHTSA published a request for comment on the agency's intent to include a vehicle measure of rollover resistance, its Static Stability Factor (SSF), as an addition to the New Car Assessment Program (NCAP).

The agency believes that consumer information on the rollover risk of passenger cars and light multipurpose passenger vehicles and trucks, based on the vehicle's SSF, would reduce the number of injuries and fatalities from rollover crashes. This information would enable prospective purchasers to make informed choices about new vehicles based on differences in real-world rollover risk and serve as a market incentive to manufacturers in striving to design their vehicles with greater rollover resistance.

Included in the notice was a new statistical study undertaken to demonstrate a relationship between SSF and rollover rate representative of the whole country. A relationship between rollover rate and SSF normalized to the national rollover rate and to a nationally representative set of driver and road use variables was developed as a basis for a comparative rating system for rollover risk in the event of a single-vehicle crash. We had available crash reports of 185,000 single-vehicle crashes from six states from 1994 to 1997 in which it was possible to determine the make/model of the vehicles and whether rollover occurred in the course of a single-vehicle crash, and for which SSF data were also available. We also had the NASS GES data sampling system, with far fewer but nationally representative crash reports, to determine the national average rollover rate for the population of vehicles investigated in the state reports.

The notice specified a comment closing date of July 31, 2000 (60 days after date of publication). However, on July 10, 2000 we received a request for an extension of the comment closing date from the Alliance of Automobile Manufacturers (AAM). The AAM stated that it would need an additional 30 days to allow for replication and analysis of the statistical study presented in the appendix to the notice.

NHTSA wants the public to have adequate time to analyze the statistical study and other facts that are the basis for our proposed rollover rating system. The request for an additional 30 days Start Printed Page 46885does not seem excessive. Thus, in order to provide the AAM and other interested parties ample time and opportunity to analyze the study presented in the notice and to express their views on the proposal, NHTSA believes that there is good cause for the extension of the comment period and that such extension in consistent with the public interest. Accordingly, the AAM request to extend the comment period for an additional 30 days is granted. The comment period will now close August 30, 2000.

Start Authority

Authority: 49 U.S.C. 322, 30111, 30115, 30117, and 30166; delegation of authority is at 49 CFR 1.50.

End Authority Start Signature

Issued on: July 26, 2000.

Stephen R. Kratzke,

Associate Administrator for Safety Performance Standards.

End Signature End Supplemental Information

[FR Doc. 00-19398 Filed 7-31-00; 8:45 am]