New York’s deadly train crash was easily the worst transportation debacle of the weekend, but Massachusetts had its own share of headaches when an icy road led to a massive pileup that involved 65 cars and three tractor trailers. Some 35 people went to hospitals, but miraculously, nobody was killed. However, the closure of Interstate 290 for most of the morning meant that many, many people were a lot later getting home from Thanksgiving than they would have liked.