Transportation Types
National Travel Governance:
NTSB: National Transportation Safety Board
NTSB Aviation Accident Database
US Department Of Transportation (USDOT)

Air
FAA: Federal Aviation Administration
EEA   EEA Fly-In Event
National Air Traffic Control Association Voice
PASS: Professional Airways Systems Specialists
White House Commission On Aviation Safety And Security
Air Transport Association
Air Transport History
Delta Air SkyLinks
Boeing
Aeroseek Aviation Search Engine
Airliners.Net Pics Archives

Plane Design on the Web as it happens :)
Farnborough-Aircraft.com

Traffic / Design Engineering
Richard C. Moeur
Special Handling
Air Cranes S64 Used by Erickson
Moving Infobase
American Moving & Storage Association

Rail
TrainWeb:  All Things Train
Monorails of the World
Great Model Railway Server