On September 28, 2003, at 1926 central daylight time, a Beech 35-33, N978T, owned and piloted by a commercial pilot, received substantial damage when it veered off runway 22 during landing at Evansville Regional Airport (EVV), Evansville, Indiana. The airplane then impacted an airport sign. Visual meteorological conditions prevailed at the time of the accident. The 14 CFR Part 91 personal flight was not operating on a flight plan. The pilot was uninjured. The flight originated from West Woodward Airport Woodward, Oklahoma, at 1922 and was en route to EVV. According to the pilot's statement, the flight was uneventful and he performed a well-executed approach. The pilot reported that during landing roll the airplane exited the runway prior to reaching the taxiway. When the pilot returned the airplane back to the taxiway, the airplane's wing impacted an airport sign. Upon impact, the left wing of the airplane was substantially damaged. The pilot stated that he should have used more caution on landing roll. At 1854, the EVV Automated Surface Observing System recorded the wind to be 300 degrees at 3 knots.