Another company may acquire material damage to a trailer not in possession, which applies even if there is no written trailer exchange contract for transport. A trailer-interchange agreement holds the engine carrier – the trucker pulling the trailer – responsible for any physical damage to the trailer. Companies participating in trailer interchange agreements may require these truckers to have trailer interchange insurance. This type of agreement is common when semi-trailers are used to transport goods over long distances. The trailer interchange agreement describes the companies involved in the transfer, where the transfer is to take place, and the transportation costs. The same truck driver can pick up another trailer before making their way back to Los Angeles. .