Diagnostic Study Method

Current practice in crossing treatment selection utilizes the diagnostic study method. The approach centers on a field survey procedure using a “Diagnostic T eam” composed of experienced individuals knowledgeable in key disciplines including crossing design, safety engineering, rail operations and signaling, and traffic engineering. This approach is intended to ensure that site ‑specific features are considered in adapting guidance and standards for treatments to address the issues at a crossing. The diagnostic study method can also provide an interdisciplinary approach which reflects all the technical considerations in selection of a treatment alternative. As such, the diagnostic study method, supported by additional engineering analyses conducted offsite, provides a structured approach which might satisfy the various requirements for “Engineering Study” as defined in the MUTCD (Part 1A.13). Refer to Appendix C of this Handbook for specific procedures.