A Minnesota retrofit W-beam guardrail to concrete safety-shaped (Type J) bridge rail transition design with a separate end post was previously crash tested and found to have unsatisfactory impact performance. The design was improved with the addition of a channel rub rail and the improved design was crash tested and evaluated in this study. In accordance with guidelines outlined in NCHRP Report 230, one crash test was conducted on this improved transition design. Results of the crash test indicated that this improved design met all impact performance evaluation criteria as outlined in NCHRP Report 230. This improved transition design is recommended for approval in field applications.
