Appendix II: List of Test Vehicles for MY2001 Rollover Resistance Ratings

NHTSA expects to measure the Static Stability Factor and provide rollover resistance ratings for each of the following model year 2001 vehicles. For pickups and SUVs, the agency plans to measure and report separately on both two-wheel-drive and four- or all-wheel-drive variants of each model, where applicable. In no case will a two-wheel-drive measurement be applied to a four- or all-wheel-drive variant, or vice versa. The agency may need to make substitutions for some of the models listed depending on availability. The list is arranged largely alphabetically within each vehicle category, and passenger cars are sorted by class according to the classifications used in the NHTSA NCAP frontal and side crash test programs. The order in which vehicles will be tested will be determined by the test laboratory and will depend primarily on model availability.

The following class abbreviations are used:


Ford Ford Focus   LPC 4DR
Hyundai Hyundai Accent   LPC 4DR
Toyota Toyota Corolla Prizm LPC 4DR
Toyota Toyota Echo   LPC 4DR
GM Chevrolet Cavalier Sunfire CPC 4DR
DC Dodge Neon Neon CPC 4DR
Honda Honda Civic   CPC 4DR
VW Volkswagen Jetta   CPC 4DR
GM Chevrolet Impala   MPC 4DR
DC Dodge Stratus Sebring MPC 4DR
Ford Ford Taurus Sable MPC 4DR
Honda Honda Accord   MPC 4DR
GM Pontiac Grand Am 4dr Alero MPC 4DR
Toyota Toyota Camry   MPC 4DR
Ford Ford Crown Victoria Grand Marquis HPC 4DR
Ford Lincoln LS   HPC 4DR

GM Chevrolet Astro Safari Van  
GM Chevrolet Venture Silhouette; Montana Van ext.


DC Dodge Caravan Voyager Van  
DC Dodge Grand Caravan Town & Country Van  
DC Dodge Ram Van/Wagon   Van  
Ford Ford Econoline Club Wagon Econoline Van Van  
Ford Ford Windstar   Van  
Honda Honda Odyssey   Van  
Mazda Mazda MPV   Van  
Ford Nissan Quest Villager Van  
Toyota Toyota Sienna   Van  


(will include 2WD and 4WD or AWD versions of each model listed, if applicable)

GM Chevrolet Blazer Jimmy/Envoy; Bravada SUV 4DR
GM Chevrolet Suburban Yukon XL SUV  
GM Chevrolet Tahoe Yukon SUV 4DR
GM Chevrolet Tracker Vitara SUV 4DR
DC Dodge Durango   SUV  
DC Chrysler PT Cruiser   SUV  
Ford Ford Escape Mazda Tribute SUV 4DR
Ford Ford Expedition Navigator SUV  
Ford Ford Explorer Mountaineer SUV 4DR
Honda Honda CR-V   SUV  
Isuzu Honda Passport Rodeo SUV  
DC Jeep Cherokee   SUV  
DC Jeep Grand Cherokee   SUV  
DC Jeep Wrangler   SUV 4WD only
Toyota Lexus RX300   SUV  
Mitsubishi Mitsubishi Montero Sport   SUV  
Nissan Nissan Pathfinder Infiniti QX4 SUV  
Nissan Nissan Xterra   SUV  
GM Pontiac Aztek SUV  
Subaru Subaru Forester   SUV AWD only
Toyota Toyota 4Runner   SUV  
Toyota Toyota RAV4   SUV  


(will include 2WD and 4WD versions of each model listed in most cases)

GM Chevrolet S-10 ExCab Sonoma; Hombre LT  
GM Chevrolet Silverado ExCab GMC Sierra LT  
DC Dodge Dakota ExCab   LT  
DC Dodge Ram ExCab   LT  
Ford Ford F-150   LT  
Ford Ford Ranger Mazda B-Series LT  
Nissan Nissan Frontier QuadCab   LT  
Toyota Toyota Tacoma ExCab   LT  
Toyota Toyota Tundra ExCab   LT  

1. 65 FR 34999 (June 1, 2000)

2. Light trucks include vans, minivans, sport utility vehicles (SUVs), and pickup trucks under 4,536 kilograms (10,000 pounds) gross vehicle weight rating.

3. A broken hip is an example of an AIS 3 injury.

4. In 1973, NHTSA published an Advance Notice of Proposed Rulemaking on Rollover Prevention (38 FR 9598, April 18, 1973). The comments cited here can be found in NHTSA Docket No. 73-10; Notice 1, comments 11 (MVMA) and 14 (GM).

5. Untripped rollover is a rollover induced by tire friction with the driving surface alone, resulting from a driving maneuver and usually occurring on the roadway. Tripped rollovers usually occur when a vehicle runs off the roadway and the tires and wheels contact a tripping mechanism (curb, soft soil, pavement drop off) which causes the vehicle to roll. A much smaller number of tripped rollovers occur on the road as a result of the wheel rim digging into the pavement during an extreme maneuver. Whether or not a vehicle rolls when it encounters a tripping mechanism is highly dependent on the geometric properties represented by SSF. In an untripped rollover, SSF is still very important, but other factors come in to play (such as tire properties). Therefore, GM's suggestion to use SSF to characterize a vehicle's tendency for untripped rollover was a very strong endorsement of the relationship between SSF and vehicle rollover.

6. In 1998, the agency was performing research on driving maneuvers to see if we could develop a way to ameliorate the incidence of onroad, untripped rollover, which we estimated at the time to be less than 10 percent of rollover crashes. The American Automobile Manufacturers Association (one of the predecessors of the Alliance) contracted with Calspan Corporation to review all the cases in NHTSA's Crashworthiness Data System coded as untripped to try to demonstrate that we were misplacing our research funds on a very small problem. Consequently our National Automotive Sampling System team did its own audit of the 1992-96 rollover data and concluded that some tripped rollovers were miscoded as untripped rollovers (typically these were onroad rollovers in which the vehicle was sliding sideways and tripped on its own wheel rim). Using corrected 1992-96 data, our National Center for Statistics and Analysis estimated that 3.7 percent of rollovers are untripped and 3.5 percent are both untripped and onroad, while 4.4 percent of single-vehicle rollovers are untripped. (Research Note, "Passenger Vehicles in Untripped Rollovers," September 1999.)

7. See the June 1, 2000 Request for Comments for a summary of that research.

8. Mitsubishi Montero redesign from model year (MY) 1991-99 design to MY 2000 version of the same nameplate.

9. Isuzu Rodeo

10. These metrics are explained in detail in the June 1, 2000 notice.

11. Heydinger, G.J., et al; "Measured Vehicle Inertial Parameters - NHTSA's Data through November 1998"; Society of Automotive Engineers 1999-01-1336; March, 1999.

12. Heydinger, G.J., et al; "The Design of a Vehicle Inertia Measurement Facility"; SAE Paper 950309; February 1995.

13. Bixel, R.A., et al; "Developments in Vehicle Center of Gravity and Inertial Parameter Estimation and Measurement"; SAE Paper 950356; February 1995.

14. Heydinger, G.J., et al; "An Overview of a Vehicle Inertia Measurement Facility"; Intl. Symposium on Automotive Technology; Paper 94SF034; October 1994.

15. P.L. 106-414, November 1, 2000.

16. Denial of the Wirth petition, 52 FR 49033 (December 29, 1987).

17. Termination to establish a minimum vehicle standard for rollover resistance based on TTR or CSV, 59 FR 33254 (June 28, 1994).

18. P.L. 106-346, October 23, 2000.

19. The manufacturer pays for the vehicle and the test; however, actual vehicle leasing and testing is done by a testing laboratory under contract to NHTSA.