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JT/T 646.4-2025Highway noise barriers - Part 4: Technical requirements of fully enclosed noise barrier (English PDF)

公路声屏障第4部分：全封闭声屏障技术要求

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Issued by

Ministry of Transport

Level / Type

National · Recommended

Issue date

August 29, 2025

Implementation date

December 1, 2025

Scope

JT/T 646.4-2025 is the English-translated version of 公路声屏障第4部分：全封闭声屏障技术要求.

JT/T 646.4-2025 — This standard specifies the classification, structure, general requirements, and technical requirements of fully enclosed highway sound barriers.

This standard applies to the design and use of fully enclosed highway sound barriers.

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Document preview — JT/T 646.4-2025

National Standard of the People's Republic of China

Replacing: JT/T 646.2-2016

Issued by: Ministry of Transport

What this standard covers1
Document data2

What this standard covers

This standard specifies the classification, structure, general requirements, and technical requirements of fully enclosed highway sound barriers. This standard applies to the design and use of fully enclosed highway sound barriers.

Document data

Estimated length of the Chinese original: 8,825 words.

Supersedes the earlier edition JT/T 646.2-2016.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 6 pages — is available in the English PDF.

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