U.S. Code of Federal Regulations

Regulations most recently checked for updates: Aug 27, 2025

All TitlesTitle 49Chapter IIPart 236Subpart G - Subpart G—Definitions
View all text of Subpart G [§ 236.700 - § 236.838]
§ 236.709 - Block, absolute.

A block in which no train is permitted to enter while it is occupied by another train.

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