Child Protection Systems {Ans: Infants and children are safest when properly restrained in a back seat. Common child restraint systems are rear facing, forward-facing and booster seats. Children under 2 years old should remain in rear-facing seats until height and weight exceed capacities determined by manufacturer. A. Follow manufacturer recommendations for securing detachable base (e.g., straps, seatbelt, and correct angle) B. Harness straps should be snug, straight, and positioned at, or slightly below, the child's shoulders. C. Harness chest clip should be positioned at the child's mid-chest or armpit level. This keeps the shoulder straps in the correct position. Forward-facing Transition children who outgrow rear-facing seats to forward-facing seats. Keep children in forward-facing safety seats until height and weight exceed capacities determined by manufacturer. Follow manufacturer recommendations for securing child safety seat to vehicle rear seat (e.g., straps, seatbelt, correct angle). Harness straps should be snug, straight, and positioned at, or slightly below, the child's shoulders. Harness chest clip should be positioned at the child's mid-chest or armpit level.}Railroad Crossings; 90 §15 {Ans: Operators must reduce vehicle speed to a reasonable and proper rate before proceeding over a railroad crossing. School buses and vehicles carrying explosive or flammable