Napa wines make tracks to East in cryogenic conversions.With shippers opting from all-truck to intermodal truck/rail transportation “at the fastest pace in years,” Memphis-based Cornerstone Systems recently leased 50 hyper-insulated freight cars dedicated specifically to the Napa Valley wine industry. The company already is moving about 2,000 carloads of wine per year to important eastern markets including Boston, Connecticut, New York and Florida, according to Burke Anderson, Cornerstone’s vice president of railcar services.