Personalized Traffic Engineer Interchange Toddler Long Sleeve T-Shirt. Traffic Engineer text with an inescapable interchange layout is a funny design for your favorite traffic engineer at birthdays, holidays and graduation. A classic for Fall, Winter and Spring, these long sleeve toddler t-shirts are sure to be a staple in your child's wardrobe. Whether layered or alone, this t-shirt is soft yet durable enough to stand up to your toddler's playtime demands.