| NCHRP 12-100 | Guidelines for Maintaining Small Movement Bridge Expansion Joints | Final | Published as AASHTO Guidelines for Maintaining Small Movement Bridge Expansion Joints, 1st Edition |
| NCHRP 12-101 | Seismic Evaluation of Bridge Columns with Energy Dissipating Mechanisms | Final | Two Volumes: Volume 1: Research Overview and Volume 2: Guidelines |
| NCHRP 12-102 | Recommended AASHTO Guide Specification for ABC Design and Construction | Final | |
| NCHRP 12-102A | AASHTO Guide Specification for ABC Design and Construction--Implementation Workshops | Final | The agency’s training modules are available for download. |
| NCHRP 12-103 | Bridge Superstructure Tolerance to Total and Differential Foundation Movements | Final | |
| NCHRP 12-104 | Guidelines to Improve the Quality of Element-Level Bridge Inspection Data | Final | |
| NCHRP 12-105 | Proposed AASHTO Seismic Specifications for ABC Column Connections | Final | |
| NCHRP 12-106 | Proposed Guidelines for Performance-Based Seismic Bridge Design | Final | |
| NCHRP 12-107 | Proposed AASHTO Bridge Guidelines for Use of ASTM A1010 Steel | Final | AASHTO Special Committee on Research and Innovation (R&I) decided to cancel this project and reallocate project funds to other NCHRP projects |
| NCHRP 12-108 | Guide Specification for Service Life Design of Highway Bridges | Final | |
| NCHRP 12-109 | Use of 0.7-in. Diameter Strands in Precast Pretensioned Girders | Final | Published as NCHRP Research Report 994 |
| NCHRP 12-110 | Proposed New AASHTO Load Rating Provisions for Implements of Husbandry | Final | |
| NCHRP 12-111 | Evaluating the Effectiveness of Vibration-Mitigation Devices for Structural Supports of Signs, Luminaires, and Traffic Signals | Final | Final Contractor's Report is available on the project webpage. |
| NCHRP 12-112 | Update of the AASHTO LRFD Movable Highway Bridge Design Specifications | Final | |
| NCHRP 12-113 | Proposed Modification to AASHTO Cross-Frame Analysis and Design | Final | Phase I is published as NCHRP Research Report 962. Phase II is published as NCHRP Research Report 1045. |
| NCHRP 12-114 | Guidance on Seismic Site Response Analysis with Pore Water Pressure Generation | Final | The final deliverable has been published as NCHRP Report 1092 and NCHRP Web-Only Document 383 |
| NCHRP 12-115 | Guidelines for Risk-Based Inspection and Strength Evaluation of Suspension Bridge Main Cable Systems | Final | The Final Report has been published as NCHRP Web-Only Document 353. The Guidelines have been forwarded to AASHTO COBS Technical Committee on Bridge Management. |
| NCHRP 12-116 | Proposed AASHTO Specifications for Design of Piles for Downdrag | Final | Further work will be conducted under NCHRP 12-116A in 2020 |
| NCHRP 12-116A | Proposed AASHTO Specifications for Design of Piles for Downdrag | Completed | The final deliverables will be published as NCHRP Research Report 1112 and NCHRP Web-Only Document 398 |
| NCHRP 12-117 | Guidelines for Corrosion Protection of Steel Bridges Using Duplex Coating Systems | Final | The Final Report is published as NCHRP Report 1048. The Guidelines have been forwarded to AASHTO COBS Technical Committee on Bridge Preservation |
| NCHRP 12-118 | Design and Construction Specifications for Bonded and Unbonded Post-Tensioned Concrete Bridge Elements | Active | |
| NCHRP 12-119 | MASH Railing Load Requirements for Bridge Deck Overhang | Final | Published as NCHRP Research Report 1078 |
| NCHRP 12-120 | Stainless Steel Strands for Prestressed Concrete Bridge Elements | Active | Research In Progress |
| NCHRP 12-121 | Guidelines for the Design of Prestressed Concrete Bridge Girders Using FRP Auxiliary Reinforcement | Active | Research In Progress |
| NCHRP 12-122 | Proposed AASHTO Guidelines for Applications of Unmanned Aerial Systems Technologies for Element-Level Bridge Inspection | Completed | Will be published as NCHRP Research Report 1114 |
| NCHRP 12-123 | Proposed AASHTO Guideline for Load Rating of Segmental Bridges | Active | Research In Progress |
| NCHRP 12-124 | Design of Stud Shear Connectors in Composite Steel Bridges | Active | Research In Progress |
| NCHRP 12-125 | Earthquake-Induced Bridge Displacements | Active | Research In Progress |
| NCHRP 12-126 | Design and Testing of High-Load Multi-Rotational Disc Bearings for Bridges | Pending | A research agency has been selected for the project. The contracting process is underway. |
| NCHRP 12-127 | Load Rating and Posting of Long-Span Bridges | Pending | A research agency has been selected for the project. The contracting process is underway. |
| NCHRP 12-15(5) | Fatigue Behavior of Variable Loaded Bridge Details Near the Fatigue Limit | Final | |
| NCHRP 12-23 | Recommended Revisions to the AASHTO Manual for Maintenance Inspection of Bridges | Completed | |
| NCHRP 12-26(2) | Distribution of Wheel Loads on Highway Bridges | Completed | |
| NCHRP 12-27 | Welded Repair of Cracks in Steel Bridge Members | Completed | |
| NCHRP 12-28(01) | Load Capacity Evaluation of Existing Bridges | Completed | |
| NCHRP 12-28(02) | Bridge Management Systems | Completed | |
| NCHRP 12-28(02)A | Bridge Management Systems Software | Completed | |
| NCHRP 12-28(02)B | Bridge Management Systems Software | Completed | |
| NCHRP 12-28(02)C | Conversion of BRIDGIT Bridge Management Software to Windows | Completed | |
| NCHRP 12-28(03) | Fatigue Evaluation Procedures for Steel Bridges | Completed | |
| NCHRP 12-28(06) | Distortion-Induced Fatigue Cracking in Steel Bridges | Completed | |
| NCHRP 12-28(07) | Guidelines for Evaluating Corrosion Effects in Existing Steel Bridges | Completed | |
| NCHRP 12-28(10) | Guidelines for Determining Redundancy in Steel Bridges | Completed | |
| NCHRP 12-28(11) | Development of Site-Specific Load Models for Bridge Rating | Completed | |
| NCHRP 12-28(12) | Inelastic Rating Procedures for Steel Beam and Girder Bridges | Completed | |
| NCHRP 12-28(13) | Nondestructive Load Testing for Bridge Evaluation and Rating | Completed | |
| NCHRP 12-28(13)A | Bridge Rating Through Nondestructive Load Testing | Completed | |
| NCHRP 12-29 | Design of Simple-Span Precast Prestressed Bridge Girders Made Continuous | Completed | |
| NCHRP 12-30 | Fatigue of Cables in Cable-Stayed Bridges | Completed | |
| NCHRP 12-31 | Notch Toughness Variability in Bridge Steel Plates | Final | |
| NCHRP 12-33 | Development of a Comprehensive Bridge Specification and Commentary | Completed | |
| NCHRP 12-33A | Development of a Comprehensive Bridge Specification and Commentary---Timber Structures and Code Calibration | Completed | |
| NCHRP 12-33B | Development of a Comprehensive Bridge Specification and Commentary---Concrete Structures | Completed | |
| NCHRP 12-33C | Development of a Comprehensive Bridge Specification and Commentary---Soil-Structure Interaction Systems | Completed | |
| NCHRP 12-34 | Update of AASHTO Standard Specifications for Highway Bridges: Division II---Construction | Completed | |
| NCHRP 12-35 | Recommended Specifications for the Design of Foundations, Retaining Walls, and Substructures | Completed | |
| NCHRP 12-36 | Redundancy in Highway Bridge Superstructures | Completed | |
| NCHRP 12-36(2) | Redundancy in Highway Bridge Superstructures: Phase 2 | Completed | |
| NCHRP 12-37 | Transverse Cracking in Newly Constructed Bridge Decks | Completed | |
| NCHRP 12-38 | Improved Design Specifications for Horizontally Curved Steel Girder Highway Bridges | Completed | |
| NCHRP 12-39 | Design Specifications for Debris Forces on Highway Bridges | Completed | |
| NCHRP 12-40 | Fatigue Criteria for Modular Bridge Expansion Joints | Final | |
| NCHRP 12-41 | Rapid Replacement of Bridge Decks | Completed | |
| NCHRP 12-42 | LRFD Bridge Design Specifications Support | Completed | |
| NCHRP 12-43 | Life-Cycle Cost Analysis for Bridges | Completed | |
| NCHRP 12-44 | Recommended Specifications for the Design of Movable Highway Bridges | Completed | |
| NCHRP 12-45 | Recommended Specifications for Large-Span Culverts | Completed | |
| NCHRP 12-46 | Manual for Condition Evaluation and Load Rating of Highway Bridges Using Load and Resistance Factor Philosophy | Completed | |
| NCHRP 12-47 | Redundancy in Highway Bridge Substructures | Completed | |
| NCHRP 12-48 | Design of Highway Bridges for Extreme Events | Completed | |
| NCHRP 12-49 | Comprehensive Specification for the Seismic Design of Bridges | Completed | |
| NCHRP 12-50 | Bridge Software-Validation Guidelines and Examples | Completed | |
| NCHRP 12-51 | Effect of Truck Weight on Bridge Network Costs | Completed | |
| NCHRP 12-52 | LRFD Specifications for Horizontally Curved Steel Girder Highway Bridges | Completed | |
| NCHRP 12-53 | Connection Between Simple-Span Precast Concrete Girders Made Continuous | Completed | |
| NCHRP 12-54 | Integral Connections of Steel Bridge Structures | Completed | |
| NCHRP 12-55 | Load and Resistance Factors for Earth Pressures on Bridge Substructures and Retaining Walls | Completed | |
| NCHRP 12-55A | Load and Resistance Factors for Earth Pressures on Bridge Substructures and Retaining Walls | Completed | |
| NCHRP 12-56 | Application of the LRFD Bridge Design Specifications to High-Strength Structural Concrete: Shear Provisions | Completed | |
| NCHRP 12-57 | Extending Span Ranges of Precast, Prestressed Concrete Girders | Completed | |
| NCHRP 12-58 | Effective Slab Width for Composite Steel Bridge Members | Completed | |
| NCHRP 12-59 | Design and Construction of Geosynthetic-Reinforced Soil (GRS) Abutments for Bridge Support | Completed | NCHRP Report 556: Design and Construction Guidelines for Geosynthetic-Reinforced Soil Bridge Abutments with a Flexible Facing |
| NCHRP 12-59(01) | Seismic Design of Geosynthetic-Reinforced Soil (GRS) Bridge Abutments with Flexible Facing | Completed | |
| NCHRP 12-60 | Transfer, Development, and Splice Length for Strand/Reinforcement in High-Strength Concrete | Completed | |
| NCHRP 12-61 | Simplified Shear Design of Structural Concrete Members | Completed | |
| NCHRP 12-62 | Simplified Live-Load Distribution-Factor Equations | Completed | |
| NCHRP 12-62A | Simplified Live Load Distribution-Factor Equations-Phase II | Completed | |
| NCHRP 12-63 | Legal Truck Loads and AASHTO Legal Loads for Posting | Completed | |
| NCHRP 12-64 | Application of the LRFD Bridge Design Specifications to High-Strength Structural Concrete: Flexure and Compression Provisions | Completed | |
| NCHRP 12-65 | Full-Depth, Precast-Concrete Bridge Deck Panel Systems | Completed | |
| NCHRP 12-66 | AASHTO LRFD Specifications for Serviceability in the Design of Bridge Foundations | Final | Contract was terminated on October 24, 2008 |
| NCHRP 12-67 | Multiple-Objective Optimization for Bridge Management Systems | Completed | |
| NCHRP 12-68 | Improved Rotational Limits of Elastomeric Bearings | Completed | |
| NCHRP 12-69 | Design and Construction Guidelines for Long-Span Decked Precast, Prestressed Concrete Girder Bridges | Completed | |
| NCHRP 12-70 | Seismic Analysis and Design of Retaining Walls, Buried Structures, Slopes, and Embankments | Final | |
| NCHRP 12-71 | Design Specifications and Commentary for Horizontally Curved Concrete Box-Girder Highway Bridges | Completed | |
| NCHRP 12-72 | Blast-Resistant Highway Bridges: Design and Detailing Guidelines | Final | |
| NCHRP 12-73 | Design Guidelines for Durability of Bonded CFRP Repair/Strengthening of Concrete Beams | Completed | |
| NCHRP 12-74 | Development of Precast Bent Cap Systems for Seismic Regions | Final | |
| NCHRP 12-75 | Design of FRP Systems for Strengthening Concrete Girders in Shear | Completed | |
| NCHRP 12-76 | Protocols for Collecting and Using Traffic Data in Bridge Design | Final | |
| NCHRP 12-77 | Structural Concrete Design with High-Strength Steel Reinforcement | Final | |
| NCHRP 12-78 | Evaluation of Load Rating by Load and Resistance Factor Rating | Final | |
| NCHRP 12-79 | Guidelines for Analytical Methods and Erection Engineering of Curved and Skewed Steel Deck-Girder Bridges | Final | Published as NCHRP Report 725 |
| NCHRP 12-80 | LRFD Minimum Flexural Reinforcement Requirements | Final | |
| NCHRP 12-81 | Evaluation of Fatigue on the Serviceability of Highway Bridges | Final | Published as NCHRP Report 721 |
| NCHRP 12-82 | Developing Reliability-Based Bridge Inspection Practices | Final | NCHRP 12-82(01)—Phase II started on November 26, 2012 and has an anticipated termination date of March 25, 2014. Phase II Funds is $149,542 |
| NCHRP 12-82(01) | Developing Reliability-Based Bridge Inspection Practices: Case Studies | Final | |
| NCHRP 12-83 | Calibration of LRFD Concrete Bridge Design Specifications for Serviceability | Final | |
| NCHRP 12-84 | Guidelines for the Load and Resistance Factor Design and Rating of Riveted and Bolted Gusset-Plate Connections for Steel Bridges | Final | |
| NCHRP 12-85 | Highway Bridge Fire Hazard Assessment | Final | The agency's final deliverables are available for download |
| NCHRP 12-86 | Bridge System Safety and Redundancy | Final | |
| NCHRP 12-87 | Fracture-Critical System Analysis for Steel Bridges | Final | |
| NCHRP 12-87A | Fracture-Critical System Analysis for Steel Bridges | Final | |
| NCHRP 12-88 | Synthesis on System Performance of Accelerated Bridge Construction Connections in Moderate-to-High Seismic Regions | Final | |
| NCHRP 12-89 | Recommended AASHTO LRFD Tunnel Design and Construction Specifications | Final | |
| NCHRP 12-90 | Guidelines for Shielding Bridge Piers | Final | The research report published as NCHRP Research Report 892 |
| NCHRP 12-91 | Strand Debonding for Pretensioned Girders | Final | |
| NCHRP 12-92 | Proposed LRFD Bridge Design Specifications for Light Rail Transit Loads | Final | |
| NCHRP 12-93 | Contribution of Steel Casing to Single Shaft Foundation Structural Resistance | Final | |
| NCHRP 12-94 | LRFD Minimum Flexural Reinforcement Requirements | Final | |
| NCHRP 12-95 | Connection Details of Adjacent Precast Concrete Box Beam Bridges | Final | A decision was made to discontinue work on the project beyond Phase I. The remaining work will be conducted in 2017 under NCHRP 12-95A. |
| NCHRP 12-95A | Proposed AASHTO Guidelines for Adjacent Precast Concrete Box Beam Bridge Systems | Final | The final deliverable has been published as NCHRP Report 1026 |
| NCHRP 12-96 | Simplified Full-Depth Precast Concrete Deck Panel Systems | Final | |
| NCHRP 12-97 | Guide Specification for the Design of Concrete Bridge Beams Prestressed with CFRP Systems | Completed | |
| NCHRP 12-98 | Recommended Guidelines for Prefabricated Bridge Elements and Systems Tolerances and Dynamic Effects of Bridge Moves | Final | |
| NCHRP 12-99 | Guidelines for Calculating Dynamic Effects in Large-Scale Bridge Moves | Final | NCHRP Project 12-98 has been expanded in scope and budget to include this project. |