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Retrofit of Existing Statewide Louisiana Safety Walk Bridge Barrier Railing Systems

The purpose of this research project is to evaluate the current strength and performance of the most common types of vintage concrete safety walk barriers currently in use by the Louisiana Department of Transportation and Development (LADOTD). These designs will be evaluated with respect to Manual Assessing Safety Hardware (MASH) TL-3 and 4 Specifications. For the common rail types that do not meet the requirements, retrofit bridge railing options will be engineered, designed and detailed. These retrofit options will be developed to improve the strength and crash performance of the barrier systems with respect to MASH TL-4. The retrofit options developed for this project will improve the crash performance of the bridge rail systems and maintain the safety walk areas. The retrofit options will be designed to be cost effective to fabricate and install. The research team understands the proposed retrofits developed for the safety rails selected for this project will consider the use (continued use) of the safety walk for maintenance activities or emergency vehicular stoppages.