Progress Report


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The Manual for Bridge Evaluation


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AASHTO Guide Specifications for LRFD Seismic Bridge Design


Book Description

Covers seismic design for typical bridge types and applies to non-critical and non-essential bridges. Approved as an alternate to the seismic provisions in the AASHTO LRFD Bridge Design Specifications. Differs from the current procedures in the LRFD Specifications in the use of displacement-based design procedures, instead of the traditional force-based "R-Factor" method. Includes detailed guidance and commentary on earthquake resisting elements and systems, global design strategies, demand modeling, capacity calculation, and liquefaction effects. Capacity design procedures underpin the Guide Specifications' methodology; includes prescriptive detailing for plastic hinging regions and design requirements for capacity protection of those elements that should not experience damage.




AASHTO Quarterly


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Submittal of Bid Proposals in Electronic Format


Book Description

This synthesis will be of interest to state Department of Transportation (DOT) contract officers, program managers, and construction engineers. It will also be of interest to computer specialists and construction contractors interfacing with the state DOTs using electronic media processes. It describes the current state of the practice for submittal of bid proposals in electronic format. This report of the Transportation Research Board presents a brief introduction to the history of electronic data interchange (EDI), its relation to electronic bidding, and current applications in the transportation construction industry. The results of a literature review, surveys of state DOTs and highway contractors, and interviews with industry experts and government agencies on the use of electronic bidding for highway projects are presented. Potential benefits and concerns, plus other issues related to the full implementation of electronic bidding in DOTs, are also presented. In addition, reported common plans for near future implementation of EDI technology to electronic bidding system processes for transportation construction projects are included.




User and Non-user Benefit Analysis for Highways


Book Description

This document updates and expands the American Association of State Highway and Transportation Officials (AASHTO) User Benefit Analysis for Highways, also known as the Red Book. This AASHTO publication helps state and local transportation planning authorities evaluate the economic benefits of highway improvements. This update incorporates improvements in user-benefit calculation methods and, for the first time, provides guidance for evaluating important non-user impacts of highways. Previous editions of the Red Book provided guidance regarding user benefit measurement only. This update provides a framework for project evaluations that accurately account for both user and non-user benefits. The manual and accompanying CD-ROM provide a valuable resource for people who analyze the benefits and costs of highway projects.




Highway Safety Manual Training Materials


Book Description

TRB’s National Cooperative Highway Research Program (NCHRP) Report 715: Highway Safety Manual Training Materials provides training materials to aid in implementing the American Association of State Highway and Transportation Officials’ Highway Safety Manual (HSM).




ASTM Standardization News


Book Description