Often, these accidents originally just involve one or two vehicles, but this original crash causes a chain reaction, leading to more and more damage. For instance, if a truck crashes into a tree suddenly, a car behind it might swerve to avoid the wreck, but in so doing may crash into other cars. Other vehicles may not be able to stop when a crash happens suddenly and may rear-end other vehicles. Additionally, sometimes Maryland truck accidents can send one vehicle tumbling in an unexpected direction, where they may hit other vehicles. These occurrences can cause large accidents, injuring many people from multiple different vehicles.