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Encyclopedia > AASHTO

AASHTO is the acronym by which the Association of American State Highway and Transportation Officials is most commonly known.

AASHTO is a standards setting body which publishes specifications, test protocols and guidelines which are used in highway design and construction throughout the United States. The membership consists of every US State DOT, and the Federal DOT. Most Canadian Provinces as well as a few foreign nations are affiliate members.

External Link: http://transportation.org/aashto/home.nsf/FrontPage

  Results from FactBites:
Comments and Recommendations (15918 words)
AASHTO calls on the US Access Board to provide cost estimates and a financial plan for the implementation of these guidelines to illustrate the potential financial impacts of their proposed solutions to accessibility issues on the implementing agencies prior to the release of the Notice of Proposed Rule Making.
However, AASHTO feels that there is a point at which the congestion, delay, and cost to vehicle users due to lane closures would outweigh the need to provide the alternate path on the same side of the street, and would thus warrant this requirement unreasonable (or in the Access Board’s terminology, “technically infeasible”).
AASHTO is extremely concerned about the ramifications of this guideline on existing pedestrian routes at grade-separated interchanges and bridges, since it will essentially require elevators to connect all routes between the upper and lower roadways.
Defects of the AASHTO Model (7667 words)
Both Wilkinson and AASHTO say that it is appropriate to combine Classes B and C for most purposes and recommend that this standard of an untrained, incompetent, immature, less than twelve-year-old cyclist determine the design of most of the bicycle facilities in the United States.
AASHTO says that "Studies have shown that a very low percentage of current bicycle owners qualify as experienced or highly skilled bicyclists." Actually, there have been no such studies.
AASHTO describes Class A cyclists by their purposes in cycling: commuting cycling, utility cycling, and touring cycling.
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