I visited this WHS in August 2014. I decided to visit from the Portugalete side as there is an indoor parking just next to the bridge. The "Puente Colgante" connects Portugalete to Getxo. For 7 euros I got a lift to the top part of the bridge (an back down of course!) and I walked from one side to the other. In the middle of the bridge a UNESCO flag was hoisted and on the bridge itself there were information boards on the history of the bridge as well as on other WHS around the world. The transporter bridge works non-stop and it carries a maximum of 6 cars + pedestrians for a minimal fee. I guess local pedestrians prefer using the cheaper ferry boat service however it's a great option when travelling by car. The highlight of my trip was experiencing the transporter bridge in action from high above and being able to feel every squeak and vibration as if it were coming to life. One last tip: don't forget to have a look inside the bridge gift shop; behind the ticket vendor there is the original UNESCO inscription certificate!