Recognizing the signs of a vehicle having problems ahead of you can give you a chance to slow down and get out of the way. Teen drivers often have trouble identifying the signs of impending trouble. A lack of experience, combined with the stress of being a new driver can make it difficult to take the right action when dangerous situations arise. All drivers, however, can benefit from a greater understanding of what causes cars and trucks to crash. For example, there are three things that may cause large trucks to jackknife. A driver who can spot these signs is in a better position than most to avoid a collision.