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LOS ANGELES COUNTY SHERIFF’S DEPARTMENT LAW ENFORCEMENT VEHICLE TEST AND EVALUATION PROGRAM VEHICLE MODEL YEAR 2006

vehicle dynamics test - Los Angeles County Sheriff's Department

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LOS ANGELES COUNTY SHERIFF’S DEPARTMENT

LAW ENFORCEMENT VEHICLE TEST

AND EVALUATION PROGRAM

VEHICLE MODEL YEAR 2006

TABLE OF CONTENTS

PAGE

Introduction 1 - 2

Test Protocol 3 - 8

POLICE PACKAGE VEHICLES

Vehicle Specifications 9 - 18

32 Lap High Speed Evaluation Results 19 - 48

Pursuit Course Evaluation Results 49 - 67

Brake Test Results 68 - 69

Acceleration Results 70 - 80

Heat Test Results 81 - 90

Fuel Efficiency Evaluation Results 91 - 92

Ergonomics Evaluation Results 93 - 111

Mechanical Evaluation Results 112 - 148

Communication Evaluation Results 149 - 163

SPECIAL SERVICE PACKAGE VEHICLES

2006 Ford Expedition Evaluation 164 - 180

TIRE EVALUATION

Pirelli “Winter 240 Sotto Zero” P235/55R17 Evaluation 181 - 185

Page 1

2006 MODEL YEAR VEHICLETEST

On October 12 & 13, 2005, vehicle testing was performed at the Los Angeles County Sheriff’sDepartment’s Emergency Vehicle Operation Center in Pomona, California. Daimler Chrysler,General Motors, and Ford all submitted vehicles in the “Police Package” category. PolicePackage vehicles have been identified by the manufacturers as pursuit vehicles. Ford alsosubmitted a vehicle in the “Special Service” category. Special Service vehicles are not rated aspursuit vehicles. All of the vehicles submitted, either as a police pursuit vehicle, or as a specialservice vehicle, completed the test satisfactorily, without incident.

Additionally, the Pirelli “Winter 240 Sotto Zero” P235/55R17 snow tire was evaluated. The tirewas mounted on a 2006 Crown Victoria Police Interceptor with the 3.27 differential. This tirecompleted the test satisfactorily, without incident.

The vehicles submitted for evaluation were all 2006 model years, and are identified below.

HIGH SPEED POLICE PACKAGE VEHICLE CATEGORY:

Chevrolet Impala: Full size, 4 door sedan, front wheel drive, 3.9 liter V-6engine, a 4 Speed automatic transmission with overdrive,and a 3.29 axle ratio.

Chevrolet Tahoe: Full size, 4 door sport utility, rear wheel drive, 5.3 liter V-8engine, a 4 speed automatic transmission with overdrive,and a 3.73 axle ratio.

Chevrolet Tahoe (E-85): Full size, 4 door sport utility, rear wheel drive, 5.3 liter V-8engine, a 4 speed automatic transmission with overdrive,and a 3.73 axle ratio.

Dodge Charger V-6: Full size, 4 door sedan, rear wheel drive, 3.5 liter V-6engine, a 5 speed automatic electronic transmission and a2.87 axle ratio.

Dodge Charger V-8: Full size, 4 door sedan, rear wheel drive, 5.7 liter V-8 Hemiengine, a 5 speed automatic electronic transmission and a2.82 axle ratio.

Dodge Magnum V-6: Full size, 4 door wagon, rear wheel drive, 3.5 liter V-6engine, a 5 speed automatic electronic transmission and a2.87 axle ratio.

Page 2

CONTINUED - HIGH SPEED POLICE PACKAGE VEHICLE CATEGORY:

Dodge Magnum V-8: Full size, 4 door wagon, rear wheel drive, 5.7 liter V-8Hemi engine, a 5 speed automatic electronic transmissionand a 2.82 axle ratio.

Ford Crown Victoria 3.27 Full size, 4 door sedan, rear wheel drive, 4.6 Liter V-8engine, a 4 speed automatic transmission with overdrive,and a 3.27 axle ratio.

Ford Crown Victoria 3.55 Full size, 4 door sedan, rear wheel drive, 4.6 Liter V-8engine, a 4 speed automatic transmission with overdrive,and a 3.55 axle ratio.

SPECIAL SERVICE VEHICLE CATEGORY:

Ford Expedition Full size, 4 door sport utility, rear wheel drive, 5.4 liter V-8engine, a 4 speed automatic transmission with overdrive,and a 3.73 axle ratio.

Page 3

TESTPROTOCOL

Page 4

PRELIMINARY HANDLING AND TEST DRIVER'SSUBJECTIVE EVALUATION

This test is conducted on a high speed driving course. It is designed to evaluate, identify andeliminate the obvious unacceptable vehicles (i.e., those vehicles that are demonstrably unstableor otherwise exhibit unsafe characteristics).

For this test, four drivers are utilized for each vehicle. Each driver completes eight laps aroundour 1.57 mile test track at the Los Angeles County Fairplex in Pomona, for a total of 32 timedlaps. Lap timing is via a "HOT LAP," digital-infrared timing device, mounted in the vehicle. The fastest and the slowest lap times are eliminated, the remaining 6 lap times are averaged. Theaverage time and speed are recorded next to the drivers name.

Four Emergency Vehicle Operations Center driver training instructors, two each from the LosAngeles County Sheriff’s Department and Los Angeles Police Department share the driving andevaluation of these vehicles.

At the conclusion of the preliminary handling portion of the test, each driver completes a"Drivers Subjective Evaluation" form. If the test vehicle is judged unacceptable in thispreliminary review, it is rejected and not subject to further testing and evaluation.

ACCELERATION PERFORMANCE TEST

This test is designed to measure vehicle performance in terms of acceleration, including speedand time elapsed at the quarter mile. Although the top speed is not recorded, a minimum of 100MPH is generally obtained to satisfy the requirements for high speed law enforcement patrol.

All of the information gathered during the acceleration and subsequent brake test is gatheredusing a “DATRON SPEED SENSOR.” This electronic device measures distance, time andspeed. The Datron Speed Sensor is lap top computer driven and is the same type used by mostmajor automobile manufacturers in conducting their vehicle evaluations

Page 5

BRAKE TEST

This test procedure measures the braking response and efficiency of the vehicle.

The test is conducted immediately following the preliminary handling test (32 laps). Thisensures that the brakes are tested after being driven at high speeds, thus simulating the actualoperating conditions experienced by the officer in the field.

The test is conducted by first accelerating the vehicle to 80 MPH, then decelerating to a stop,maintaining an average deceleration rate of 22 feet per second. This procedure is repeated threeadditional times. At this point, a five minute stationary cool down period occurs. The vehicle isthen accelerated to a speed of 60 MPH and decelerated at the maximum deceleration rateattainable before the onset of ABS. After a two minute delay, the 60 MPH procedure is repeatedagain. As soon as the vehicle has stopped, it is immediately accelerated to 60 MPH and thenstopped as quickly as possible, simulating a panic stop. That stopping distance is measured andrecorded. If a brake malfunction is experienced (i.e., severe fading or inability to stop in astraight line,) an effort is made to detect the cause of the brake failure. If it is decided that thefailure is inherent in the engineering of the brake system of the vehicle, the test is discontinuedand the vehicle is disqualified from further testing. If the failure is associated with a correctablesituation, it is corrected and the test is rerun. The defect and any remedial action taken are notedin the test results.

PURSUIT COURSE

This test is for those vehicles equipped with a factory installed “POLICE PACKAGE” andidentified by the manufacturer as pursuit vehicles. This test is conducted on a closed 2.45 milecity street course which closely represents the environment most urban law enforcementemergency response vehicles must contend with. The course has virtually no straight-a-ways andconsists of right and left hand turns and obstacles in the road way.

This is the final test during our “road” certification and the manufacturer’s, if they so choose, areallowed to rebuild the vehicle’s brake system prior to this test.

For this test, two drivers are utilized for each vehicle. Each driver completes two laps aroundthe city or “pursuit” course. Lap timing is via a "HOT LAP," digital-infrared timing device,mounted in the car. The combined times of the two laps are recorded next to the driver's name.

If the test vehicle is unable to complete the course in under 4 minutes and 45 seconds, it is judgedunacceptable for high speed law enforcement use.