Astrabudua
In Astrabudua, (Erandio, Vizcaya) the option choosed was the automatic bollad with a proximity sendor in the ground to preview when vehicles pass near the bollard.
Once the operation button is pushed the bollard hides in the ground and the vehicle can pass without any obstacle. A sensor under the ground detects when the vehicle has already passed and makes the bollard elevate and stay in original position.
