Intermodal customers such as J.B. Hunt (NASDAQ: JBHT), Hub Group (NASDAQ: HUBG) and UPS (NYSE: UPS) might shift much of their business toward trucking, entirely cutting out the rail leg in the transport process. But railroad performance appears less certain in the future, amid worries about inflation and lower shipping volume as economic growth slows, and the threat that increasingly efficient freight trucking will grab business. Although shipping volume declined, CSX still managed to increase Q1 revenue by 21%, with pricing gains and fuel surcharges compensating for higher costs.