7500 Transpec Driver Alert Sign $689.22 Quantity discounts available QuantityPrice Quantity -+ Add to Cart Details Used on rear of school bus to alert drivers behind the bus that the bus is coming to a stop.Designed to reduce or eliminate running into or pa... Details Back DetailsUsed on rear of school bus to alert drivers behind the bus that the bus is coming to a stop.Designed to reduce or eliminate running into or passing the bus while children are being dropped off or picked up.