What alternative transportation strategies are best? Ethanol will reduce America's dependence on crude oil / Brian Jennings ; The claimed benefits of ethanol are unfounded / John Stossel ; Hydrogen has significant promise as an alternative fuel / Daniel Sperling and Joan Ogden ; The promise of hydrogen as an alternative fuel is exaggerated / Joseph J. Romm ; Public transportation will reduce urban congestion / Lester Hoel ; Public transportation will not diminish Americans' love of cars / Joel Kotkin

What transportation policies best protect national security? Privatizing airport security will better protect passengers / Anthony Gregory ; Privatization will not resolve airport security challenges / Paul C. Light ; The United States should maintain control of ports / The Nation ; Outsourcing port management will not threaten national security / The Washington Post ; The NAFTA superhighway threatens U.S. sovereignty and security / Kelly Taylor ; The NAFTA superhighway is an unsubstantiated rumor / Philip Dine

What laws best protect driver safety? Seat belts reduce highway fatalities / Danielle E. Roeber ; Seat belt laws are unnecessary / Ted Balaker ; Motorcycle helmet laws save lives / Marian Moser Jones and Ronald Bayer ; Motorcycle helmet laws limit personal freedom / Jacob Sullum ; Laws banning cell phone use while driving are necessary / Joseph J. Hazewski ; Restrictions on elderly drivers are necessary / Anastasia Niedrich ; Restrictions on elderly drivers are unnecessary / Eli Lehrer

What is the future of transportation? Maglev trains have significant benefits / Eric Russell ; Maglev trains are impractical and expensive / Los Angeles Times ; Space elevators will transport people and payloads into space / Keith Gerein ; Space elevator development faces serious challenges / The Economist ; Commercial space travel will become increasingly common / Katherine Mangu-Ward ; Flying cars may soon take to the air / Christopher McDougall.