What 29 CFR 1926.202 (removed July 15, 2019) requires (plain English)
29 CFR 1926.202 was the barricades section of Subpart G (Signs, Signals, and Barricades). Its single sentence required barricades for the protection of employees to conform to Part 6 of the Manual on Uniform Traffic Control Devices (MUTCD). It is still cited in older safety programs, subcontract exhibits and training decks, which is why this page exists, but it was removed from the Code of Federal Regulations effective July 15, 2019.
The removal came in OSHA's Standards Improvement Project-Phase IV (SIP-IV) final rule, 84 FR 21416 (May 14, 2019). OSHA rewrote 1926.200(g) so that paragraph (g)(1) requires traffic control signs and devices at points of hazard and paragraph (g)(2) requires the design and use of all traffic control devices (signs, signals, markings, barricades and other devices) to conform to Part 6 of the MUTCD. With (g)(2) covering barricades expressly, OSHA deleted 1926.202 as duplicative and deleted 1926.203 (definitions) because the MUTCD defines the same terms. The same rule updated the incorporated MUTCD from the Millennium Edition to the 2009 Edition.
Nothing about the field obligation changed: barricades protecting construction workers still have to be the standardized, retroreflective, correctly placed devices the MUTCD prescribes, and they still work with signs (1926.200) and flaggers (1926.201) to control work-zone traffic. What changed is the citation. A compliance officer writing a barricade violation today cites 1926.200(g)(1) or (g)(2), and a written traffic-control plan should say the same.