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Manual Notice: 2018-1

From: Camille Thomason, P.E

Manual: Roadway Design Manual

Effective Date: April 26, 2018

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Purpose

Roadway Design Manual updates to provide vertical clearance guidance for roadways on the Texas Highway Freight Network (THFN):

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  • To provide guidance for the THFN Design Deviation Process;
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  • To provide an explanation and guidance for which projects on the THFN are affected by the new policy;
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  • To provide vertical clearance criteria for applicable projects on the THFN.
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Contents

Table of Contents

The addition of the Texas Highway Freight Network (THFN) Design Deviation process to Chapter 1, Section 2. The new addition of Section 8 to Chapter 3.

Chapter 1

Contents: The addition of the Texas Highway Freight Network (THFN) Design Deviation process.

Section 2: The addition of a new subsection that defines the Texas Highway Freight Network (THFN) Design Deviation process.

Chapter 3

Contents:

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  • Addition of the Texas Highway Freight Network (THFN) to the Contents.

Section 1:

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  • Addition of the Texas Highway Freight Network (THFN) to list of roadway classes, and cross references to Chapter 3, Section 8, and Chapter 1.
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  • Addition of reference to the THFN Design Deviation process.

Section 8: New Section that explains the application of the Texas Highway Freight Network (THFN) policy. This includes the following:

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  • The policy is effective for applicable bridge construction and reconstruction projects on the THFN, Let on September 1, 2020 or later,
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  • Designation of a roadway as being on the latest THFN map maintained by the Transportation Planning and Programming Division (TP&P),
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  • The specific vertical clearance design criteria:

Chapter 4

Section 5: Addition of a cross reference to Chapter 3, Section 8.

Chapter 6

Section 1: Under the Project Conditions, Addition of a cross reference to Chapter 3, Section 8.

Chapter 8

Section 1: In the last paragraph, the addition of a reference to the THFN Design Deviation process.

Section 2: Under Vertical Clearance at Structures, the addition of a reference to Chapter 3, Section 8.

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Contact

Contact the Roadway Design Section of the Design Division at (512) 416-2678 with any questions or comments.

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Archives

Past manual notices are available in a pdf archive.

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