The Chicago rail hub saw 15,428 cars pass through its major classification yards in the week ending Dec. 24, the Surface Transportation Board (STB) reported Thursday. That was up from 14,835 cars, the previous week. The average number of trains held for arrival into the nation’s largest rail hub rose to an average of 2.29 per day in the week ended Dec. 24. That up from an average of 0.85 trains per day the previous week. Among reporting railroads, the NS reported an average of 0.43 trains per day were held, up from 0.14 trains per day the previous week. The CN reported that it held an average of 1.57 trains per day, up from an average of 0.57 trains per day the previous ...