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Database Analysis 79 Table 4-26. Summary of variables captured in LTCCS. Vehicle Driver Packaging Infrastructure Situational Configuration Age Package Type Road Surface Pre-Crash Condition Cargo Body Experience Quantity Shipped Road Condition Dangerous Event GVW Condition Quantity Lost Road Type Vehicle Speed Vehicle Defect Valid License Age (Cargo Tank) Traffic Way Impact Location Vehicle Response Citation Issued Rollover Protection Access Control Primary Reason Driver Response Inspection History Speed Limit Accident Type Training Design Specification No. of Lanes Weather Condition Location Light Condition Time of Day Health Consequences Key: Variable obtained Partially met Not captured If a comprehensive study of selected classes of accidents is performed, there are significant advantages to performing a selected number of accident investigations annually rather than per- forming a larger intensive study over a one- to two-year period as was done for the LTCCS. The advantage of continuing studies is that the investment in training can be realized over many years, and trends in the data also can be evaluated. Any program for identifying root and contributing causes could, for selected classes of accidents 1. Obtain data taken from interviews with drivers and other witnesses with information about the crash. There are many factors that cannot be obtained unless post-vehicle-inspections and reviews of driver qualifications are conducted. 2. Obtain data collected from SAFER, SAFESTAT, and the MCMIS Registration file. Such data would provide information on the programs to ensure that hazmat is being transported using well-trained drivers in safe vehicles. 3. Visit the scene of the accident to obtain first-hand observations, including photographs of the scene, vehicle damage, scaled measurements, and a scene measurement log. Such informa- tion is critical for accident reconstruction and also to resolve any data inconsistencies. 4. Consider the techniques developed in the LTCCS. It is not considered feasible to perform the level of analysis performed in the LTCCS on all hazmat accidents. However, just as the LTCCS looked at injury and fatality accidents involving heavy trucks in a selected area, so it would be possible to perform the LTCCS level of analysis for perhaps 50 to 100 hazmat accidents annu- ally, perhaps those involving a specific type of hazardous material (e.g., TIH [toxic inhalation hazard] cargo tank shipments). Such analyses could be multimodal if accident investigations were coordinated. 4.6 Railroad Accident/Incident Reporting System (RAIRS) Prevention of hazmat releases caused by railroad accidents differs from other modes in a vari- ety of respects due to physical, operational, and institutional factors. Some of the important dif- ferences include