{"data":{"id":"us/49-cfr-563.8","jurisdiction":"us","citation":"49 CFR 563.8","heading":"Data format.","body":"(a) The data elements listed in Tables I and II, as applicable, must be reported in accordance with the range, accuracy, and resolution specified in Table III.\nTable III—Reported Data Element Format\nData element Minimum range Accuracy 1 Resolution\nLateral acceleration At option of manufacturer At option of manufacturer At option of manufacturer.\nLongitudinal acceleration At option of manufacturer At option of manufacturer At option of manufacturer.\nNormal Acceleration At option of manufacturer At option of manufacturer At option of manufacturer.\nLongitudinal delta-V −100 km/h to + 100 km/h ±10% 1 km/h.\nLateral delta-V −100 km/h to + 100 km/h ±10% 1 km/h.\nMaximum delta-V, longitudinal −100 km/h to + 100 km/h ±10% 1 km/h.\nMaximum delta-V, lateral −100 km/h to + 100 km/h ±10% 1 km/h.\nTime, maximum delta-V, longitudinal 0-300 ms, or 0−End of Event Time plus 30 ms, whichever is shorter ±3 ms 2.5 ms.\nTime, maximum delta-V, lateral 0-300 ms, or 0−End of Event Time plus 30 ms, whichever is shorter ±3 ms 2.5 ms.\nTime, maximum delta-V, resultant 0-300 ms, or 0−End of Event Time plus 30 ms, whichever is shorter ±3 ms 2.5 ms.\nVehicle Roll Angle −1080 deg to + 1080 deg ±10% 10 deg.\nSpeed, vehicle indicated 0 km/h to 200 km/h ±1 km/h 1 km/h.\nEngine throttle, percent full (accelerator pedal percent full) 0 to 100% ±5% 1%.\nEngine rpm 0 to 10,000 rpm ±100 rpm 100 rpm.\nService brake On or Off N/A On or Off.\nABS activity On or Off N/A On or Off.\nStability control On, Off, or Engaged N/A On, Off, or Engaged.\nSteering input −250 deg CW to + 250 deg CCW ±5% ±1%.\nIgnition cycle, crash 0 to 60,000 ±1 cycle 1 cycle.\nIgnition cycle, download 0 to 60,000 ±1 cycle 1 cycle.\nSafety belt status, driver On or Off N/A On or Off.\nSafety belt status, right front passenger On or Off N/A On or Off.\nFrontal air bag warning lamp On or Off N/A On or Off.\nFrontal air bag suppression switch status, right front passenger On, Off, or Auto N/A On, Off, or Auto.\nFrontal air bag deployment, time to deploy/first stage, driver 0 to 250 ms ±2ms 1 ms.\nFrontal air bag deployment, time to deploy/first stage, right front passenger 0 to 250 ms ±2 ms 1 ms.\nFrontal air bag deployment, time to nth stage, driver 0 to 250 ms ±2 ms 1 ms.\nFrontal air bag deployment, time to nth stage, right front passenger 0 to 250 ms ±2 ms 1 ms.\nFrontal air bag deployment, nth stage disposal, driver Yes or No N/A Yes or No.\nFrontal air bag deployment, nth stage disposal, right front passenger Yes or No N/A Yes or No.\nSide air bag deployment, time to deploy, driver 0 to 250 ms ±2 ms 1 ms.\nSide air bag deployment, time to deploy, right front passenger 0 to 250 ms ±2 ms 1 ms.\nSide curtain/tube air bag deployment, time to deploy, driver side 0 to 250 ms ±2 ms 1 ms.\nSide curtain/tube air bag deployment, time to deploy, right side 0 to 250 ms ±2 ms 1 ms.\nPretensioner deployment, time to fire, driver 0 to 250 ms ±2 ms 1 ms.\nPretensioner deployment, time to fire, right front passenger 0 to 250 ms ±2 ms 1 ms.\nSeat track position switch, foremost, status, driver Yes or No N/A Yes or No.\nSeat track position switch, foremost, status, right front passenger Yes or No N/A Yes or No.\nOccupant size classification, driver 5th percentile female or larger N/A Yes or No.\nOccupant size classification, right front passenger Child N/A Yes or No.\nOccupant position classification, driver Out of position N/A Yes or No.\nOccupant position classification, right front passenger Out of position N/A Yes or No.\nMulti-event, number of event 1 or 2 N/A 1 or 2.\nTime from event 1 to 2 0 to 5.0 sec 0.1 sec 0.1 sec.\nComplete file recorded Yes or No N/A Yes or No.\n1 Accuracy requirement only applies within the range of the physical sensor. For vehicles manufactured after September 1, 2014, if measurements captured by a sensor exceed the design range of the sensor, the reported element must indicate when the measurement first exceeded the design range of the sensor.\n(b) Acceleration Time-History data and format: the longitudinal, lateral, and normal acceleration time-history data, as applicable, must be filtered either during the recording phase or during the data downloading phase to include:\n(1) The Time Step (TS) that is the inverse of the sampling frequency of the acceleration data and which has units of seconds;\n(2) The number of the first point (NFP), which is an integer that when multiplied by the TS equals the time relative to time zero of the first acceleration data point;\n(3) The number of the last point (NLP), which is an integer that when multiplied by the TS equals the time relative to time zero of the last acceleration data point; and\n(4) NLP—NFP + 1 acceleration values sequentially beginning with the acceleration at time NFP * TS and continue sampling the acceleration at TS increments in time until the time NLP * TS is reached.","path":["Title 49—Transportation","Subtitle B—Other Regulations Relating to Transportation","CHAPTER V—NATIONAL HIGHWAY TRAFFIC SAFETY ADMINISTRATION, DEPARTMENT OF TRANSPORTATION","PART 563—EVENT DATA RECORDERS"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-49.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:34Z","sha256":"6195e2b426d074d3d2762491d831f8376111641a324a1ffe44fdcb8e238029ef","source_id":"us-cfr","stale":true,"prev":"us/49-cfr-563.7","next":"us/49-cfr-563.9"},"notice":"GroundRules: Original legal text. Not legal advice."}