RL1: Bridge/Structure Identification Number
A unique federal inspection/inventory identifier assigned to a bridge, underpass, overpass, or tunnel bridge/structure that is also linkable to the national bridge inventory.
Source: Obtained by linking Crash Location (C5) to the Roadway Inventory data.
Number as described in Recording and Coding Guide for the Structure Inventory and Appraisal of the Nation’s Bridges, December 1988, Federal Highway Administration, item 8 and HPMS/90, item 77.
Important to link specific geometric data describing the bridge for problem identification analysis and for determining the relationship between bridge structure characteristics and crashes.