4 die in early morning crash on I-95 in Port St. Lucie Southbound lanes closed for about 8 hours after fatal crash Four people are dead after an early morning crash on I-95 in St. Lucie County. and last updated 2021-03-14 18:30:34-04 PORT ST. LUCIE, Fla. â Four people are dead after an early morning crash on Interstate 95 in St. Lucie County. According to the Florida Highway Patrol, a van was stopped between the right and center lane of southbound I-95, just south of Gatlin Boulevard about 4:30 a.m. A pickup truck was not able to avoid the van and collided with the van's right side.