Train Videos To view any of the Traffex Engineers videos full screen, click the “Full screen” icon in the bottom right corner while video is playing. Light Rail Preemption and Quad Gates Queue Cutter Part I Roundabout Near a Railroad Crossing Queue Cutter Part II Video Library Access Management Bus Transit Services Interchanges & Intersections Light Rail Pedestrians & Bikes Roundabouts Traffic Calming Traffic Safety Traffic Signals Trains