Data elements.

  1. Law
  2. CFR 49
  3. Transportation
  4. Other Regulations Relating to Transportation
  5. National Highway Traffic Safety Administration, Department of Transportation
  6. Event Data Recorders
  7. Data elements.

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§ 563.7 Data elements.

(a) Data elements required for all vehicles. Each vehicle equipped with an EDR must record all of the data elements listed in Table I, during the interval/time and at the sample rate specified in that table.

Expand Table

Table I - Data Elements Required for All Vehicles Equipped With an EDR

Data element Recording interval/time1
(relative to time zero) 		Data sample rate
(samples per second)
Delta-V, longitudinal 0 to 250 ms or 0 to End of Event Time plus 30 ms, whichever is shorter 100
Maximum delta-V, longitudinal 0-300 ms or 0 to End of Event Time plus 30 ms, whichever is shorter N/A
Time, maximum delta-V 0-300 ms or 0 to End of Event Time plus 30 ms, whichever is shorter N/A
Speed, vehicle indicated −5.0 to 0 sec 2
Engine throttle, % full (or accelerator pedal, % full) −5.0 to 0 sec 2
Service brake, on/off −5.0 to 0 sec 2
Ignition cycle, crash −1.0 sec N/A
Ignition cycle, download At time of download3 N/A
Safety belt status, driver −1.0 sec N/A
Frontal air bag warning lamp, on/off2 −1.0 sec N/A
Frontal air bag deployment, time to deploy, in the case of a single stage air bag, or time to first stage deployment, in the case of a multi-stage air bag, driver Event N/A
Frontal air bag deployment, time to deploy, in the case of a single stage air bag, or time to first stage deployment, in the case of a multi-stage air bag, right front passenger Event N/A
Multi-event, number of event Event N/A
Time from event 1 to 2 As needed N/A
Complete file recorded (yes, no) Following other data N/A

1 Pre-crash data and crash data are asynchronous. The sample time accuracy requirement for pre-crash time is −0.1 to 1.0 sec (e.g., T = −1 would need to occur between −1.1 and 0 seconds.)

2 The frontal air bag warning lamp is the readiness indicator specified in S4.5.2 of FMVSS No. 208, and may also illuminate to indicate a malfunction in another part of the deployable restraint system.

3 The ignition cycle at the time of download is not required to be recorded at the time of the crash, but shall be reported during the download process.

(b) Data elements required for vehicles under specified conditions. Each vehicle equipped with an EDR must record each of the data elements listed in column 1 of Table II for which the vehicle meets the condition specified in column 2 of that table, during the interval/time and at the sample rate specified in that table.

Expand Table

Table II - Data Elements Required for Vehicles Under Specified Minimum Conditions

Data element name Condition for
requirement 		Recording interval/time1
(relative to time zero) 		Data sample rate (per second)
Lateral acceleration If recorded2 N/A N/A
Longitudinal acceleration If recorded N/A N/A
Normal acceleration If recorded N/A N/A
Delta-V, lateral If recorded 0-250 ms or 0 to End of Event Time plus 30 ms, whichever is shorter 100
Maximum delta-V, lateral If recorded 0-300 ms or 0 to End of Event Time plus 30 ms, whichever is shorter N/A
Time maximum delta-V, lateral If recorded 0-300 ms or 0 to End of Event Time plus 30 ms, whichever is shorter N/A
Time for maximum delta-V, resultant If recorded 0-300 ms or 0 to End of Event Time plus 30 ms, whichever is shorter N/A
Engine rpm If recorded −5.0 to 0 sec 2
Vehicle roll angle If recorded −1.0 up to 5.0 sec3 10
ABS activity (engaged, non-engaged) If recorded −5.0 to 0 sec 2
Stability control (on, off, or engaged) If recorded −5.0 to 0 sec 2
Steering input If recorded −5.0 to 0 sec 2
Safety belt status, right front passenger (buckled, not buckled) If recorded −1.0 sec N/A
Frontal air bag suppression switch status, right front passenger (on, off, or auto) If recorded −1.0 sec N/A
Frontal air bag deployment, time to nth stage, driver4 If equipped with a driver's frontal air bag with a multi-stage inflator Event N/A
Frontal air bag deployment, time to nth stage, right front passenger4 If equipped with a right front passenger's frontal air bag with a multi-stage inflator Event N/A
Frontal air bag deployment, nth stage disposal, driver, Y/N (whether the nth stage deployment was for occupant restraint or propellant disposal purposes) If recorded Event N/A
Frontal air bag deployment, nth stage disposal, right front passenger, Y/N (whether the nth stage deployment was for occupant restraint or propellant disposal purposes) If recorded Event N/A
Side air bag deployment, time to deploy, driver If recorded Event N/A
Side air bag deployment, time to deploy, right front passenger If recorded Event N/A
Side curtain/tube air bag deployment, time to deploy, driver side If recorded Event N/A
Side curtain/tube air bag deployment, time to deploy, right side If recorded Event N/A
Pretensioner deployment, time to fire, driver If recorded Event N/A
Pretensioner deployment, time to fire, right front passenger If recorded Event N/A
Seat track position switch, foremost, status, driver If recorded −1.0 sec N/A
Seat track position switch, foremost, status, right front passenger If recorded −1.0 sec N/A
Occupant size classification, driver If recorded −1.0 sec N/A
Occupant size classification, right front passenger If recorded −1.0 sec N/A
Occupant position classification, driver If recorded −1.0 sec N/A
Occupant position classification, right front passenger If recorded −1.0 sec N/A

1 Pre-crash data and crash data are asynchronous. The sample time accuracy requirement for pre-crash time is −0.1 to 1.0 sec (e.g. T = −1 would need to occur between −1.1 and 0 seconds.)

2 “If recorded” means if the data is recorded in non-volatile memory for the purpose of subsequent downloading.

3 “vehicle roll angle” may be recorded in any time duration; −1.0 sec to 5.0 sec is suggested.

4 List this element n − 1 times, once for each stage of a multi-stage air bag system.

[73 FR 2181, Jan. 14, 2008, 73 FR 8408, Feb. 13, 2008, as amended at 76 FR 47486, Aug. 5, 2011]


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