The construction of SunRail’s Southern Expansion includes approximately 17.2 miles of expanded commuter rail service between the Sand Lake Road Station in Orange County and the Poinciana Station in Osceola County on the existing Central Florida Rail Corridor (CFRC). Improvements will provide a safe and efficient transportation alternative for motorists, enhance safety features along the corridor, and improve grade crossings for train, pedestrian, and vehicular traffic. WGI supported the JV by providing construction survey services. WGI checked existing project survey control, revalued those controls that did not meet construction tolerances, provided layout of ballast and earthwork, provided layout of road crossing features and traffic control, and as-built constructed improvements as requested by the contractor.