Aiden Pearce first used during the E3 2012 gameplay video. It was used to change all the traffic lights at a junction to their 'green' state to cause a large collision of cars to trap Joseph DeMarco.
This ability allows him to control traffic lights to cause car accidents or to escape from trouble.
Hold [ ] / X to redirect traffic signals and cause accidents. Press [ ] / X while the blue diamond flashes to take out vehicles.