Aqui está o exemplo do Manual de Voo de Avião da FAA (capítulo 7):
If there are no other aircraft present, the pilot should check traffic indicators on the ground and wind indicators to determine which runway and traffic pattern direction to use. [Figure 7-2] Many airports have L-shaped traffic pattern indicators displayed with a segmented circle adjacent to the runway. The short member of the L shows the direction in which the traffic pattern turns are made when using the runway parallel to the long member. The pilot should check the indicators from a distance or altitude well away from any other airplanes that may be flying in the traffic pattern.
Veja o que parece em Huntsville Executive (KMDQ ) , que tem um padrão à direita para a pista 36: