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What steering, accelerator and brake data say before impact
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Case question
Can the driver’s maneuver be reconstructed from the seconds immediately before impact?
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What the evidence showed
The 4Runner pre-crash data captured rising speed, accelerator position, steering angle and brake status. Viewed together, those channels provide a much stronger description of vehicle maneuver than any single field.
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Practical takeaway
Interpret synchronized channels together. Steering angle, pedal position and brake status are contextual evidence—not standalone conclusions about intent or fault.
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Reading the exhibit
Deceleration and distance-to-impact columns are derived from sampled speed, not independent EDR measurements. Distance is approximate displacement before the final pre-crash sample; sampling gaps, wheel slip, sensor latency and incomplete data can affect it. Read the calculated values with scene evidence and the source report’s limits.
The source evidence exhibit is provided below.
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Related resources
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Related cases
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Evidence exhibit
Complete pre-crash table for Most Recent (3rd Impact) from the Toyota 4Runner report. Sample times, units and recorded and derived column labels are preserved.
