Chakaia Booker, Acid Rain, 2001, rubber tires and wood, overall: 120 x 240 x 36 inches; each armature (3 total): 80 x 48 x 1 inches; tire pallet (12 total): 22 x 48 x 40 inches. National Museum of Women in the Arts, Washington, DC. Museum purchase: Members’ Acquisition Fund © Chakaia Booker. Photo by Lee Stalsworth.

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Transportation

The transportation sector is rapidly evolving. Safety, environmental, and efficiency concerns have spurred many innovations, including electric cars and trucks, more efficient airplanes, ridesharing technologies, and autonomous vehicles. These innovations have, in turn, produced new policy challenges. The articles in this section explore a changing transportation sector and how these changes affect other policy priorities, such as energy, homeland security, infrastructure, and the environment.