Library

NBI Coding Guide

The Recording and Coding Guide for the Structure Inventory and Appraisal of the Nations Bridges

NBI Recording and Coding Guide Errata

The guide is in metric units. Data in InfoBridge™ is presented in US customary units.

NBE Specification

Specification for National Bridge Inventory Bridge Elements

InfoBridge Brochure

LTBP InfoBridge Brochure

Bridge Component Condition Forecast Models

The bridge component condition forecast models are products of on-going research:

• Base Models
• Survival Models
• Machine Learning Models

The bridge component condition forecast models are only available for bridges matching all the following criteria:

• Length of Maximum Span (NBI Item # 48) < 200 ft, and
• Main Span Materials (NBI Item # 43A)=1 or 2 or 3 or 4 or 5 or 6, and
• Main Span Design (NBI Item # 43B)=1 or 2 or 3 or 4 or 5 or 6 or 22, and
• Deck Structure Type (NBI Item # 107)=1 or 2.

Bridge Network Performance Forecast Models

The bridge network performance forecast models are based on the bridge component condition forecast models, which are products of on-going research:

• Survival Models
• Machine Learning Models

Bridge Condition Transition

• Bridge Condition Transition History
• Bridge Condition Transition Forecast

Asset Valuation Calculations

• Asset Valuation Calculations