Skateboards are typically used for recreation, usually involving tricks. However, penny boards are often utilized solely for transportation. Simply riding a skateboard without any tricks is referred to as cruising, which can be understood as the action of sailing without a defined route or destination. Both traditional skateboards and penny boards have a close relationship with transportation, especially transportation to and on university campuses. A United States census found that the highest rates of non-motorized transportation is seen in between the ages 16–24 year-old. Thus it can be reasonably suggested that skateboards usually penny boards, for various reasons, have an increased presence on large college campuses. Students are seen cruising between classes and resting their boards against the walls of lecture halls. These non-motorized modes of transportation are so popular that according to the California Department of Transportation, travelers such as skateboarders, roller skaters, and scooter users ride nearly 50 million miles per year. Moreover, a survey at University of California, Santa Barbara found that 7% of students skateboard to class compared to the 6% that drive a vehicle to campus. Skateboards are a hugely popular form of transportation, yet many schools maintain policies prohibiting their use on campuses, claiming they are disruptive and harmful to the campus. However, penny boards compact size, convenience, aesthetic, and fun nature are what continue to draw thousands of students to these boards.