LYNN – A 48-year-old man remained hospitalized Monday night after a public bus struck him on Rand Street around 2:30 p.m., authorities said.Police know the man’s identity, but did not release it Monday night pending notification of family members, according to Lynn and MBTA Transit police.Loved ones arrived at the scene a short time after the crash and became visibly upset.Debris, including clothes and shoes left behind by the victim, remained strewed on the street next to a parked car Monday afternoon.Transit Police and Lynn Police questioned the bus driver and numerous passengers on the Route 436 bus, who were ordered to remain on the bus after the accident.The victim was initially going to be transported by helicopter to a Boston hospital, but for reasons unknown, the helicopter was not able to transport the victim. He was being treated at an undisclosed hospital Monday night.Rand Street is a side street that runs between Chestnut Street and Ford Street. The MBTA bus was taking a detour around Chestnut Street, which is closed in both directions due to construction, according to MBTA spokeswoman Lydia Rivera.The bus route runs from Liberty Tree Mall in Danvers via Goodwin Circle to Central Square in Lynn.Investigators blocked off Rand Street and kept the bus at the crash scene well into Monday evening.