Project Number Project Title Stage Comments
NCHRP 22-05Develop Performance Standards and Hardware for Low Service Level Guardrail SystemsCompleted
NCHRP 22-05AWarrants for the Installation of Low Service Level Guardrail SystemsCompleted
NCHRP 22-06Roadside Safety Design for Small VehiclesCompleted
NCHRP 22-07Update of "Recommended Procedures for Safety Performance Evaluation of Highway Appurtenances"Completed
NCHRP 22-08Evaluation of Performance Level Selection Criteria for Bridge RailingsCompleted
NCHRP 22-09Improved Procedures for Cost-Effectiveness Analysis of Roadside Safety FeaturesCompleted
NCHRP 22-10Updated Materials for a Traffic Barrier/Small Sign Support Hardware GuideCompleted
NCHRP 22-11Evaluation of Roadside Features to Accommodate Vans, Mini-Vans, Pickup Trucks, & 4-Wheel Drive VehiclesCompleted
NCHRP 22-12Guidelines for the Selection, Installation, and Maintenance of Highway-Safety FeaturesCompleted
NCHRP 22-12(02)Selection Criteria and Guidelines for Highway Safety FeaturesCompleted
NCHRP 22-12(03)Recommended Guidelines for the Selection of Test Levels 2 Through 5 Bridge RailsCompleted
NCHRP 22-13Performance of Roadside BarriersCompleted
NCHRP 22-13(2)Expansion and Analysis of In-Service Barrier Performance Data and Planning for Establishment of a DatabaseCompleted
NCHRP 22-14Improvement of the Procedures for the Safety-Performance Evaluation of Roadside FeaturesCompleted
NCHRP 22-14(02)Improved Procedures for Safety-Performance Evaluation of Roadside FeaturesCompleted
NCHRP 22-14(03)Evaluation of Existing Roadside Safety Hardware Using Updated CriteriaCompleted
NCHRP 22-14(04)Testing of Cable Median Barrier in a Narrow DitchActive
NCHRP 22-15Improving the Compatibility of Vehicles and Roadside Safety HardwareCompleted
NCHRP 22-16Development of an Improved Roadside Barrier SystemCompleted
NCHRP 22-17Recommended Guidelines for Curbs and Curb-Barrier CombinationsCompleted
NCHRP 22-18Crashworthy Work-Zone Traffic Control DevicesCompleted
NCHRP 22-19Aesthetic Concrete Barrier and Bridge Rail DesignsCompleted
NCHRP 22-20Design of Roadside Barrier Systems Placed on MSE Retaining WallsCompleted
NCHRP 22-20(02)Design Guidelines for TL-3 through TL-5 Roadside Barrier Systems Placed on Mechanically Stabilized Earth (MSE) Retaining WallsActive
NCHRP 22-21Median Cross-Section Design for Rural Divided HighwaysFinal
NCHRP 22-22Placement of Traffic Barriers on Roadside and Median SlopesFinal
NCHRP 22-22(02)Effectiveness of Traffic Barriers on Non-Level TerrainActive
NCHRP 22-23Criteria for Restoration of Longitudinal BarriersCompleted
NCHRP 22-24Guidelines for Verification and Validation of Crash Simulations Used in Roadside Safety ApplicationsCompleted
NCHRP 22-25Development of Guidance for the Selection, Use, and Maintenance of Cable Barrier SystemsCompleted
NCHRP 22-26Factors Related to Serious Injury and Fatal Motorcycle Crashes with Traffic BarriersActive
NCHRP 22-27Roadside Safety Analysis Program (RSAP) UpdateCompleted
NCHRP 22-28Criteria for Restoration of Longitudinal Barriers, Phase IIActive
NCHRP 22-29Performance of Longitudinal Barriers on Curved, Superelevated Roadway SectionsCompletedThe project was terminated due to the departure of several key staff.
NCHRP 22-29AEvaluating the Performance of Longitudinal Barriers on Curved, Superelevated Roadway SectionsCompleted
NCHRP 22-29BEvaluating the Performance of Longitudinal Barriers on Curved, Superelevated Off-RampsActive
NCHRP 22-30In-Service Performance Evaluation of W-beam End TerminalsPendingThe proposed project has been reallocated to a potential special study.
NCHRP 22-31Recommended Guidelines for the Selection and Placement of Test Levels 2 through 5 Median BarriersActive
NCHRP 22-32Development of Methods to Evaluate Side Impacts for Next Edition MASHPending
NCHRP 22-33Multi-State In-Service Performance Evaluations of Roadside Safety HardwarePending
NCHRP 22-34Determination of Zone of Intrusion Envelopes under MASH Impact Conditions for Barrier AttachmentsActiveResearch in progress. Interim report anticipated August 2019.
NCHRP 22-35Evaluation of Bridge Rail Systems to Confirm AASHTO MASH ComplianceActive
NCHRP 22-36Synthesis of the Performance of Portable Concrete Barrier SystemsFinal
NCHRP 22-37Development of a MASH Barrier to Shield Pedestrians, Bicyclists, and Other Vulnerable Users from Motor VehiclesActive
NCHRP 22-38Local Stiffening to Reduce Deflection of 31 in. Midwest Guardrail System (MGS) for MASH TL-3Pending
NCHRP 22-3931-in. Midwest Guardrail System (MGS) and Curb Combination Guidelines for MASH TL-3Pending
NCHRP 22-40Update to AASHTO M 180-18 and Associated Highway Guardrail SpecificationsActive
NCHRP 22-41Proposed Modification to AASHTO LRFD Bridge Design Specifications, Section 13—RailingActive
NCHRP 22-42Impact Performance Assessment of Barrier Performance at High SpeedsAnticipated
NCHRP 22-43Proposed AASHTO Guidelines for Implementation of MASH for Sign Supports, Breakaway Poles, and Work Zone Traffic Control DevicesRFP
NCHRP 22-44A Transportation Agency Data Collection Practice for Use with In-Service Performance Evaluations (ISPEs)RFP
NCHRP 22-455th E of Safety: Informing the Selection of Countermeasures by Evaluating, Analyzing, and Diagnosing Contributing Factors that Lead to Crashes AnticipatedJoint project with BTSCRP-14
NCHRP 22-46Supporting Data-Driven Decision Making through an Expansion of the Human Factors Guidelines for Road SystemsAnticipated
NCHRP 22-47Incorporating Driver Behavior Considerations in Safety Performance Estimates of Infrastructure ImprovementsAnticipated
NCHRP 22-48Development of Crash Prediction Models for Short-Term DurationsRFP
NCHRP 22-49The Effect of Vehicle Mix on Crash Frequency and Crash SeverityAnticipated