puff jamming (IMAGE) University of California - San Diego Caption Trajectories in time traced out by turbulent puffs as they move along a simulated pipe and in experiments, with blue regions indicate the puff "traffic jams." The images on the left are closer to the laminar-turbulent transition than those on the right, so one can clearly see the traffic jams melt away as the directed percolation transition is approached. Credit Nigel Goldenfeld / UC San Diego Usage Restrictions editorial use only License Original content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.