1122 SEBRING CIRCUIT CHANGES 1952-82 (5.2 miles) The first 30 years of the 12 Hours of Sebring were held on the original 5.2 mile circuit which included two long airport runways. The only major change in the circuit during this period was the elimination of the Webster Turn in 1967. It was replaced with the Green Park Chicane. 1983 (4.75 miles) A segment deleting part of the runway section altered the course in 1983. The new section reduced the length, bypassing a large portion of an active airport runway. 1984-86 (4.86 miles) ���������������������������������������������������������������������������������������������������������������������������������������������� as the Ulmann straight was moved out. 1987-90 (4.11 miles) Sebring became a permanent year-round circuit after massive changes. The north-south runway was deleted and a new asphalt course re placed the circuit from turn one through the esses, which were replaced by the carrousel. 1991-95 (3.70 miles) A major improvement program began with wid en ing, resurfacing and rerouting of the track. Turns 8, 9 and the carrousel were deleted, placing a warehouse building outside the circuit. 1996-97 (3.6 miles) Following the 1995 race, the Fangio chicane was relocated closer to the Hairpin, which shortened the circuit slightly. 1997 (3.75 miles) Following the 1997 race and before the October FIA GT event, the entrance ������������������������������������������������������������������������������������������������������������������������������������������������������ the circuit slightly. The Ulmann straight was paved with asphalt. Turn 17 was returned to its original design after the FIA race. 1998-present (3.74 miles) After the 1998 12 hour and before the September IMSA event, the Hairpin configuration was changed to create more safety run-off.
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