Light Vehicle and Heavy Truck Test
Track Verification Test Results

Outline

• Introduction
• Light Vehicle Test Track Verification Test Results
• Heavy Truck Test Track Verification Test Results

Objectives of Track Verification Tests

• Judge pass/fail of the system in crash-imminent tests for all valid test runs
• Evaluate the consistency of system performance

Pass/Fail Judgment

• Must meet pass/fail criteria in 8 out of 10 valid runs
• Use of NIST Independent Measurement System (IMS) measures
• Comparison between NIST IMS and UMTRI Data Acquisition System (DAS) measures - check on DAS accuracy and latency

Run Validity Assessment

• Meeting run validity criteria in test procedures
• Use of UMTRI DAS measures supplemented by NIST IMS
• Verification with video images
• Key variables of interest:
  • Longitudinal speed
  • Relative longitudinal speed
  • Lateral average speed
  • Range between host and lead vehicles @ brake onset by lead vehicle
  • Range between host and lead vehicles @ cut-in by lead vehicle
  • In-lane vehicle position

Breakdown of Light Vehicle Tests

• Tests were conducted in September-October 2007
• 5 LCW & 1 MT test were retested in February 2008

Breakdown of Heavy Truck Tests

• All tests were conducted in September 2007
• 4 LDW and 2 LCW tests were rested in November 2007
• 1 FCW, 1 LDW, 3 LCW, 1 MT, and 1 NW tests were retested in March 2008