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NHI offering web-based course on rockfall stabilization
July 7th, 2017
The National Highway Institute (NHI), in partnership with the Transportation Curriculum Coordination Council (TCCC) and the American Association of State Highway and Transportation Officials (AASHTO) is offering an online training course in rockfall stabilization. The four-hour online course will cover such topics as rock reinforcement and drainage, surface stabilization, rockfall slope containment systems, and rockfall […]
Part 2: New design models for MSE walls and slopes
June 1st, 2017
Introduction The design of many geotechnical structures is based on limit-state conditions. For example, in designing gravity walls, the load exerted by the retained soil on the wall is based on an assumed active state of stresses. That is, the wall moves sufficiently outward, enabling the retained soil to mobilize its shear strength along a […]
New subcommittee ASTM D35.06 on geosynthetic product specifications
February 22nd, 2017
Notification to ASTM D35 Members During 2016, representatives of ASTM International and ASTM D35 Committee on Geosynthetics were in discussion with the American Association of State Highway and Transportation Officials’ (AASHTO) Subcommittee on Materials (SOM), Subcommittee 4e regarding their current revision efforts on Standard Specification for Highway Applications, AASHTO M288. SOM Subcommittee 4e includes 26 […]
AASHTO, FHWA sign new environmental agreement
September 2nd, 2016
The American Association of State Highway and Transportation Officials (AASHTO) issued a press release Aug. 31 to announce that it has signed a new five-year cooperative agreement with the Federal Highway Administration (FHWA) to continue the Center for Environmental Excellence. The release said that the agreement will “advance a strategic national program to maximize efficiency, […]