This post originally appeared on Slate. By Jordan G. Teicher India’s highways are hectic. In a single trip, a driver might encounter bikes, motorcycles, ox-drawn carts, rickshaws, pedestrians, and herds of animals. But even among the clutter, it’s hard to miss the trucks. Dan Eckstein was traveling through Rajasthan after a 2011 wedding in Goa when he first noticed the colorful, personalized trucks that would later become the subject of his book, Horn Please, to be published by PowerHouse Books in December. He returned to India in 2012 and 2013 for two three-week trips, and traveled more than 6,000 miles on highways across the country to photograph the amazing vehicles.