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Regulations last checked for updates: May 14, 2025
Title 23 - Highways last revised: Jan 01, 1900
All Titles
Title 23
Chapter I
Part 646
Subpart B - Subpart B—Railroad-Highway Projects
§ 646.200 - Purpose and applicability.
§ 646.202 - [Reserved]
§ 646.204 - Definitions.
§ 646.206 - Types of projects.
§ 646.208 - Funding.
§ 646.210 - Classification of projects and railroad share of the cost.
§ 646.212 - Federal share.
§ 646.214 - Design.
§ 646.216 - General procedures.
§ 646.218 - Simplified procedure for accelerating grade crossing improvements.
§ 646.220 - Alternate Federal-State procedure.
Appendix Appendix to - Appendix to Subpart B of Part 646—Horizontal and Vertical Clearance Provisions for Overpass and Underpass Structures
authority:
23 U.S.C. 109
(e), 120(c), 130, 133(d)(1), and 315;
49 CFR 1.48
(b)
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