 A pair of tractor trailers tangled on I-95 northbound on the curb between the Route 141 interchange and the I-495 split. A flatbed spilled its load of aluminum building materials and one of the trucks smashed into the inside shoulder barrier wall so hard it dislodged it. The broken portion of wall hung over the I-295 ramp from southbound I-95 and 495 requiring closure of that road.