Need to Re-Lap Guardrails in Work Zones

#9687 March 23, 2023 Brad Julian ( [email protected]) New Mexico

NMDOT specs require guardrail to be overlapped in the same direction as the direction of traffic in the nearest lane for permanent construction. In the past, there was a requirement to re-lap guardrail in work zones if the direction of travel had changed (i.e. NB and SB traffic both on NB lanes). That requirement has disappeared from our specs and drawings and I’ve received some questions from field staff on whether NMDOT should still require the re-lapping. Is there any testing on reverse impact of guardrails? I see some for end treatments but not necessarily on the guardrail itself.

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