According to the student pilot, he was on a solo flight practicing touch-and-go takeoffs and landings. On the third approach, as he turned the airplane onto the final leg of the traffic pattern, the tower air traffic controller requested that the pilot complete a full stop landing due to an increased number of aircraft in the airport area. The touchdown and roll out were normal. The pilot subsequently attempted to turn off of the runway onto a taxiway with the airplane traveling too fast. He applied the brakes, yet the airplane proceeded off the side of the taxiway and impacted a pole, resulting in substantial damage to the left wing and fuselage. During a postaccident examination of the wreckage, a Federal Aviation Administration inspector found no anomalies with the airplane that may have contributed to the accident.