I just talked to my parents who were stuck in it too. She said it's all the "snowbirds" heading north - their leases were up on the 31st & they are all leaving FL to come home for Easter. She said it was the mass exodus of senior citizens!
OMG how many other DISers were stick on I-95 today?? What a crazy mess. Took us 12 hours to get to Charlotte from WDW today. Was going to drive straight through, but had to stop.