Chambliss Giobbi creates traffic jams that might be a commuter’s worst nightmare. The 50-year-old New York City artist is best known for collage, but three of the 15 pieces in his current show are mobiles that line up miniature toy cars bumper to bumper on twisted, endless loops. The show, “American Iron,” aims to juxtapose our nation’s enthusiasm for engineering and mass production with the consequences of our short attention spans. We cheerily build the cars and the highways, then pay little heed as our creations threaten the environment and sentence us to a Möbius strip of endless looping from home to work and back again. At 101/Exhibit, 8920 Melrose Ave., Los Angeles, (310) 271-7980. Prices range from $3,000 to $21,000.