TRB’s National Cooperative Highway Research Program (NCHRP) Synthesis 532: Seismic Design of Non-Conventional Bridges documents seismic design approaches and criteria used for “non-conventional” bridges, such as long-span cable-supported bridges, bridges with truss tower substructures, and arch bridges. Design of conventional bridges for seismic demands in the United States is based on one of t...

The Minnesota Department of Transportation has released a report that validates the Trimble MX7 system for use with intelligent compaction and paver mounted thermal profiling technologies. The Trimble MX7 is a mobile imaging system with geospatial capabilities. This report also identifies the Trimble MX7’s capability to collect other asset information along the roadway.

TRL Limited has released a report that describes a method to identify and forecast periods of time when the debris flow hazard is greater and landslide risk increases. Rainfall-induced debris flows, a form of landslide, are common in Scotland. The goal of this report is to rank the hazards posed by debris flows.

TRL Limited has released a report that describes a project to capture panoramic imagery over a two-year period at a site that is highly susceptible to rainfall-induced debris flow. The goal of this report is to determine the hazard from boulders at the site.

TRB's National Cooperative Highway Research Program (NCHRP)  Research Report 903: Geotechnical Asset Management for Transportation Agencies, Volume 2: Implementation Manual presents a manual that can be used to implement Geotechnical Asset Management (GAM) planning. Volume 1 , Research Overview, details the scope, process, and findings of the study. The management of bridge and pavement as...

TRB's National Cooperative Highway Research Program (NCHRP) Research Report 903: Geotechnical Asset Management for Transportation Agencies provides an introduction and scalable guidance for state transportation agencies on how to implement risk-based geotechnical asset management into current asset management plans. Volume 1, Research Overview, details the scope, process, and findings of the st...

TRB’s National Cooperative Highway Research Program (NCHRP) Web-Only Document 260: Proposed Refinements to Design Procedures for Geosynthetic Reinforced Soil (GRS) Structures in AASHTO LRFD Bridge Design Specifications explores the effect of adopting a closely‐spaced reinforcement layout in geosynthetic‐reinforced soil structures. While research since the early 1980s has identified the benefici...

The Minnesota Department of Transportation has released a report that determines the risk of slope failure along state highways around Minnesota. Minnesota’s climate, geomorphology, and steep terrain along rivers has the potential to increase the incidence of slope failures such as rockfalls and landslides.

The Transport Research Laboratory in the United Kingdom has released a report that determines the economic impacts of landslide events. The extent of such impacts can be considerable, particularly in rural areas where the road network is sparse and offers few route alternatives. This report examines direct economic impacts, which include the costs of clean-up and repair/replacement of lost/dama...

TRB's National Cooperative Highway Research Program (NCHRP) Web-Only Document 258: Manual on Subsurface Investigations provides an update to the American Association of State Highway Transportation Officials (AASHTO) 1988 manual of the same name. This report reflects the changes in the approaches and methods used for geotechnical site characterization that the geotechnical community has develop...