Sorting out who caused which impact
A multi-vehicle accident rarely has a single obvious cause. A driver in the middle may have been pushed into the car ahead, or may have struck it first and then been hit from behind. In New York, courts often start from the position that a driver who rear-ends another vehicle must offer a non-negligent explanation, but in a chain collision that starting point has to be applied impact by impact. Sudden lane changes, debris, weather, and road design can also be part of the story. Because fault can be shared among several drivers, and New York reduces a recovery according to each person's share rather than barring it, the order and force of each impact frequently become the central dispute.
Evidence that fades quickly
Photographs of every vehicle's damage, taken before repairs, help reconstruct the sequence of impacts. Dashcam footage, traffic and business cameras, and the event data stored in many modern vehicles can show speed and braking in the seconds before the crash, but that information can be lost when cars are repaired or sold for salvage. Get the police report number and the names and insurance information of every driver involved, not just the one who hit you. Witness contact details matter more than usual, because occupants of the involved cars often have conflicting accounts. Tell your own insurer promptly, but think before giving a recorded statement to another driver's carrier.
Insurance when several policies are involved
In New York, injured drivers and passengers generally start with no-fault benefits for medical bills and some lost earnings, usually through the policy on the vehicle they were riding in, and those applications have short deadlines. A claim against another driver for pain and suffering generally requires meeting the state's serious injury threshold. When many people are hurt, one driver's liability limits may have to be divided among several claimants, which can make your own underinsured motorist coverage important. Commercial trucks and rideshare vehicles can add more policies and more parties. Early in the matter we map out each vehicle and insurer, identify what must be filed soon, and plan how to preserve the evidence of how the impacts unfolded.