# Presentation: 759439

**Event data Recorders – **
**User Perspectives on **
**Parameters & Data Accessibility**
- June 5, 2003

**Augustus “Chip” Chidester**
**Crash Investigations Division**
**National Center for Statistics and Analysis**

***SAE TOPTEC***
***Government\Research***

## Discussion TopicsGovernment/Research

- EDR Field Data Collection Program at NHTSA
- Collection Rates & Missing Data Issues
- EDR Data Needed for Crash Discrimination
- What We Have Learned
- The Bottom Line

## EDR Field Data Collection Program at NHTSA

- To date NHTSA has over 1,100 EDR data files in the Electronic Data Collection System(EDCS)
- Approximately 20 files were documented via the SCI program pre-EDCS.
- First case in 1991

***EDR Field Data Collection Program at NHTSA***

## CY2002 first data collection year that EDR data has coded variables in NCSA EDS.
CY2002 All NASS/SCI/CIREN team members were equipped with Vetronix CDR units.
2002 NASS CDS EDR Data Collection Effort 
2002 NASS data file as of 12/1/2002 
684 cases with EDR Equipped Vehicles

**CY2002 **_***All***_*** *****NASS/SCI/CIREN team members were equipped with Vetronix CDR units.**
**2002 NASS CDS EDR Data Collection Effort **
**2002 NASS data file as of 12/1/2002 **
- 684 cases with EDR Equipped Vehicles

***EDR Field Data Collection Program at NHTSA***

## EDR Field Data Collection Program at NHTSA

***EDR Field Data Collection Program at NHTSA***

**Gabler, H.C., T. Roston “Estimating Crash Severity:  Can Event Data Recorders Replace Crash Reconstruction”, Paper No. 02-490, Proceedings of the 18th International Technical Conference on the Enhanced Safety of Vehicles, Nagoya, Japan (May 2003)**

## EDR Field Data Collection Program at NHTSA

**NASS CDS First 11 Months of CY2002 Distribution of Equipped Not Recovered EDR Data**

***EDR Field Data Collection Program at NHTSA***

## EDR Data Needed for Crash Discrimination

***EDR Data Needed for ******Crash Discrimination***

## The most effective method to observe and/or measure and confirm the performance of Advanced 208 Compliant Occupant Protection System Features is through the EDR data

***What We Have Learned:******EDR Data Collection***

**  ****Crash pulse, time to****   deployment, restraint****   usage, etc**
**  ****Deployment timing of****   the dual‐stage air bag****   system**

## Sample of EDR Data Collected in a Multi-Stage Air Bag System

## Sample of EDR Data Collected in a Multi-Stage Air Bag System

***Sample of EDR Data Collected in a Multi-Stage Air Bag System***

## We can only read a limited number of vehicles
Vetronix CDR tool
Version 2.0 of Vetronix Software 
Most General Motors 1994 and newer 
Some Ford and Mercury 2001 and newer
Isuzu Hombre 2000 - 2002 and Ascender 2003

**Vetronix CDR tool**
**Version 2.0 of Vetronix Software **
- Most General Motors 1994 and newer
- Some Ford and Mercury 2001 and newer
- Isuzu Hombre 2000 - 2002 and Ascender 2003

***What We Have Learned:******EDR Data Collection***

## We need the EDR data! 
Investigators cannot determine:
System performance
When the air bag(s) deployed
Which stage the air bag(s) deployed
Timing issues (pretensioners, 2nd stage deployments, disposals)

**Investigators **_**cannot**_** determine:**
**System performance**
**When the air bag(s) deployed**
**Which stage the air bag(s) deployed**
**Timing issues (pretensioners, 2****nd**** stage deployments, disposals)**

***The Bottom Line***

## Questions?

***Questions?***