Roadway Design Manual (RDW)

Roadway Design Manual Revised April 2018. 2018 by Texas Department of Transportation (512) 463-8630 all rights reserved Manual Notice 2018-1. From: Camille Thomason, Manual : Roadway Design Manual Effective Date: April 26, 2018. Purpose Roadway Design Manual updates to provide vertical clearance guidance for roadways on the Texas Highway Freight Network (THFN): To provide guidance for the THFN Design Deviation Process;. To provide an explanation and guidance for which projects on the THFN are affected by the new policy;. To provide vertical clearance criteria for applicable projects on the THFN. 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.

addition of Appendices D, and E. Under External Reference Documents, updated references. Section 2: Revised controlling criteria per FHWA guidance for Design Exceptions, Waivers, and Variances. Reduced controlling criteria from 13 to 10. Under Design Exceptions, added guidance that 4' minimum width is required for new bike lanes.

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  Reference, Appendices

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