This is the 5041st most frequent Spanish word.
estacionado
Parked.
In this sentence, 'estacionado' is used as a past participle to indicate the state of the car being parked.
El coche está estacionado frente a la casa.
The car is parked in front of the house.
Here, 'estacionada' describes the bicycle's state of being parked, and agrees in gender and number with 'bicicleta' (feminine singular).
Juan dejó su bicicleta estacionada cerca de la escuela.
Juan left his bicycle parked near the school.
In this usage, 'estacionados' functions as an adjective describing the vehicles that are parked, matching in gender and number the plural masculine noun 'vehículos'.