From the analysis done on the upstream MGS stiffness transition, the addition of a post at the location you have highlighted red should not negatively affect the performance of the guardrail. It likely isn’t necessary, but I don’t see how it would cause issues. One note, the recommended barrier lengths upstream of the transition would increase (distance to terminal or flared section). The recommendations provided within the MGS transition report for the length of MGS upstream of the transition would need to increase by 6.25-ft. But, if you have a long installation length, this wouldn’t be a problem.
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