Roadside Database Coding Manual (2023)

Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

Roadside Database Coding Manual Copyright National Academy of Sciences. All rights reserved. 148 ROLLOVERS TABLE

Roadside Database Coding Manual Copyright National Academy of Sciences. All rights reserved. 149 ROLLOVER FORM TRIP POSITION LATERAL TRIP POSITION Screen Name: Lateral Trip Position Data Table: Rollovers Variable: LatTrip Element Attributes: 0 ± 999 Lateral distance to trip in meters Source: NASS/CDS or CISS Scene Diagram Remarks: This is the lateral distance between the point of departure and the initiation of the rollover. The trip point should be defined as the last vehicle on the scene diagram drawn upright prior to roll/at end of tire marks indicating point where vehicle went airborne.

Roadside Database Coding Manual Copyright National Academy of Sciences. All rights reserved. 150 ROLLOVER FORM TRIP POSITION LONGITUDINAL TRIP POSITION Screen Name: Longitudinal Trip Position Data Table: Rollovers Variable: LongTrip Element Attributes: 0 ± 999 Longitudinal distance to trip in meters Source: NASS/CDS or CISS Scene Diagram Remarks: This is the longitudinal distance between the point of departure and the initiation of the rollover. The trip point should be defined as the last vehicle on the scene diagram drawn upright prior to roll/at end of tire marks indicating point where vehicle became airborne.

Roadside Database Coding Manual Copyright National Academy of Sciences. All rights reserved. 151 ROLLOVER FORM END-OF-ROLL POSITION LATERAL END-OF-ROLL POSITION Screen Name: Lateral End-of-Roll Position Data Table: Rollovers Variable: LatEnd Element Attributes: 0 ± 999 Lateral distance to end-of-roll in meters Source: NASS/CDS or CISS Scene Diagram Remarks: This is the lateral distance between the point of departure and the end of the rollover.

Roadside Database Coding Manual Copyright National Academy of Sciences. All rights reserved. 152 ROLLOVER FORM END-OF-ROLL POSITION LONGITUDINAL END-OF-ROLL POSITION Screen Name: Longitudinal End-of-Roll Position Data Table: Rollovers Variable: LongEnd Element Attributes: 0 ± 999 Longitudinal distance to end-of-roll in meters Source: NASS/CDS or CISS Scene Diagram Remarks: This is the longitudinal distance between the point of departure and the end of the rollover.

Roadside Database Coding Manual Copyright National Academy of Sciences. All rights reserved. 153 ROLLOVER FORM RECONSTRUCTION ROLL DISTANCE Screen Name: Total Roll Distance Data Table: Rollovers Variable: TotalRollDistance Element Attributes: 0–999.9 Actual distance traveled during roll in meters Source: Reconstruction Methods Remarks: This element gives the combined three-dimensional length of all trajectory segments during the rollover. This is the distance used for the rollover reconstruction, and is derived from the trip and end-of-roll positions, as well as the recorded roadside slopes. It differs from the NASS-CDS variable GV.ROLLDIST in that it is not the linear distance between the trip and end-of-roll positions. The trip point should be defined as the last vehicle on the scene diagram drawn upright prior to roll/at end of tire marks indicating point where vehicle became airborne.

Roadside Database Coding Manual Copyright National Academy of Sciences. All rights reserved. 154 ROLLOVER FORM RECONSTRUCTION ELEVATION CHANGE Screen Name: Total Height Change Data Table: Rollovers Variable: TotalHeightChange Element Attributes: -990–990 Change in elevation during roll in meters -999 Unknown/no rollover grade given Source: Reconstruction Methods Remarks: This element gives the total change in elevation used during the rollover reconstruction and is derived from the trip and end-of-roll positions and recorded roadside slopes. If no rollover grade is given, enter “-999.”

Roadside Database Coding Manual Copyright National Academy of Sciences. All rights reserved. 155 ROLLOVER FORM RECONSTRUCTION TRIP SPEED Screen Name: Speed at Start-of-Roll Data Table: Rollovers Variable: SpeedTrip Element Attributes: 0–999.9 Speed in km/h Source: Reconstruction Methods Remarks: This element gives the speed at the start of the roll based on the reconstruction.

Roadside Database Coding Manual Copyright National Academy of Sciences. All rights reserved. 156 ROLLOVER FORM RECONSTRUCTION SPEED AT END-OF-ROLL Screen Name: Speed at End-of-Roll Data Table: Rollovers Variable: SpeedEnd Element Attributes: 0–999.9 Speed in km/h Source: Reconstruction Methods Remarks: This element gives the speed at the end of the roll. If the vehicle comes to rest at the completion of the roll, this variable should equal 0.

Roadside Database Coding Manual Copyright National Academy of Sciences. All rights reserved. 157 ROLLOVER FORM RECONSTRUCTION ADDITIONAL ENERGY DISSIPATED Screen Name: Additional Energy Dissipated Data Table: Rollovers Variable: ExtraNRGDisp Element Attributes: 0–9999.9 Energy dissipated in Joules Source: Reconstruction Methods Remarks: Any additional energy dissipated during the roll due to factors other than friction (i.e., colliding with a tree) used for the reconstruction should be recorded in this variable. If there are multiple sources of additional energy dissipation, the energy dissipated should be summed, and the total recorded here.

Roadside Database Coding Manual Copyright National Academy of Sciences. All rights reserved. 158 ROLLOVER FORM RECONSTRUCTION SPECIAL RECONSTRUCTION PROCEDURES USED? Screen Name: Special Reconstruction Procedure Used? Data Table: Rollovers Variable: SpecialProcedureUsed Element Attributes: 0 No 1 Yes -999 Not applicable Source: Reconstruction Methods Remarks: This variable answers the question, “Was the standard reconstruction procedure followed exactly?” If this is “Yes” (1), the rollover event can be reconstructed using only the fields in the database and with the same results as those recorded in the database. If the case cannot be reconstructed, then enter “-999.”

Roadside Database Coding Manual Copyright National Academy of Sciences. All rights reserved. 159 ROLLOVER FORM RECONSTRUCTION SPECIAL RECONSTRUCTION PROCEDURES Screen Name: Special Reconstruction Procedure Data Table: Rollovers Variable: SpecialProcedure Element Attributes: Text field – Maximum of 80 characters -999 Not applicable Source: Reconstruction Methods Remarks: Provide a short description of the special procedure utilized. If this section is not applicable, then enter “-999.”