Tiêu chuẩn quốc tế

• Số hiệu / Standard Number: AASHTO HDG TOC:2007
• Năm ban hành / Publication date: 2007
• Tình trạng / Status: A - Còn hiệu lực
• Tên tiếng Anh / Title in English: Highway Drainage Guidelines
• Thay thế cho / Replace: AASHTO HDG TOC:1999
• Số trang / Page: 12

Phạm vi áp dụng / Scope of standard

Foreword: The Highway Subcommittee on Design, as part of its
charge, prepares and keeps current publications pertaining to
principles, methods, and procedures of roadway design, including
practices to protect and to enhance the quality of the environment.
As the subject of highway drainage is important to many disciplines
and many phases of highway engineering, the Subcommittee requested
and received approval from the Standing Committee on Highways to
establish a task force to prepare needed publications on the
subject of highway drainage. Consequently, the Task Force on
Hydrology and Hydraulics was established and first met in February
1970, developed a statement of purpose, and outlined a program of
activity. The purpose of the Task Force is to assist the
Subcommittee in developing guidelines and in formulating policy for
highway disciplines, giving due consideration to safety and the
environment.

Pursuant to this purpose, the Task Force on Hydrology and
Hydraulics began the preparation of guidelines covering topics on
major areas of highway hydraulic design. To the extent practicable,
each Guideline is a stand-alone volume, but reference to other
guidelines in the series is utilized to avoid unnecessary
repetition. Since these Guidelines are intended to provide an
overview, discussion, and design philosophy for each of the covered
topics, technical information is kept to a minimum by making
reference to appropriate publications and to the AASHTO Model
Drainage Manual which contains recommended design policy, criteria,
procedures, aids and example problems.

The following Guidelines were originally published as separate
volumes: I, II and III in 1973, IV in 1975, V in 1977, and VII in
1982. Consolidated editions were published in 1973 of I-III, in
1975 of I-IV, in 1979 of I-VI, in 1982 of I-VII, and in 1987 of
I-VIII which was also printed in the current loose-leaf format. The
1992 edition of the Guidelines contains rewritten Volumes I-III,
updated volumes IV-VIII, and new volumes IX, X, and a Glossary. A
new, separate Volume XI was published in 1994. The 1999 edition of
the Guidelines is a metric conversion of the 1992 edition and also
contains new Guidelines, Volumes XI, XII, XIII, and XIV, which are
in metric format. This 2007 Edition contains both metric (SI) and
U.S. Customary units, replaces the Volume designations with Chapter
designations, and contains a new Guideline, Chapter 15.

The Highway Subcommittee on Design gratefully acknowledges the
efforts of members of the Task Force on Hydrology and Hydraulics in
preparing the Guidelines and the cooperation of the States
participating in this endeavor.