Transportation Research Thesaurus (TRT)

  1. O&D USE Origin and destination
  2. Obesity
  3. Object oriented databases
  4. Object oriented programming
  5. Objectives USE Strategic planning
  6. OBO USE Ore bulk oil carriers
  7. Observation wells
  8. Obstacle detection USE Proximity detectors
  9. Obstacles (Navigation) USE Obstructions (Navigation)
  10. Obstruction beacons
  11. Obstruction buoys
  12. Obstruction buoys
  13. Obstruction lights
  14. Obstruction markers
  15. Obstructions (Navigation)
  16. Occupant dynamics
  17. Occupant kinetics
  18. Occupant modeling USE Crash victim simulation
  19. Occupant protection devices
  20. Occupant rescue USE Vehicle occupant rescue
  21. Occupant vehicle interface
  22. Occupants USE Vehicle occupants
  23. Occupational accidents USE Industrial accidents
  24. Occupational diseases
  25. Occupational safety
  26. Occupations
  27. Ocean bottom
  28. Ocean bottom soils
  29. Ocean currents
  30. Ocean development
  31. Ocean engineering
  32. Ocean freight forwarders
  33. Ocean going tugs
  34. Ocean liners
  35. Ocean platforms USE Offshore platforms
  36. Ocean shipping
  37. Ocean thermal power plants USE Thermal power plants
  38. Ocean tides
  39. Ocean travel
  40. Ocean water USE Seawater
  41. Ocean waves
  42. Oceanographic vessels
  43. Oceanography
  44. Oceans
  45. OCR USE Optical character recognition
  46. Octane number
  47. Odometers
  48. Odors
  49. Oedometers
  50. Off airport terminals USE Satellite terminals (Airports)
  51. Off peak periods
  52. Off ramps
  53. Off street parking
  54. Offenders
  55. Offenders and victims
  56. Office buildings
  57. Office parks USE Business parks
  58. Officer personnel USE Military personnel
  59. Officers USE Military personnel
  60. Officials and employees USE Personnel
  61. Offroad traffic
  62. Offroad vehicles USE All terrain vehicles
  63. Offset intersections
  64. Offsets (Traffic signal timing)
  65. Offshore airports
  66. Offshore construction
  67. Offshore drilling platforms
  68. Offshore moorings
  69. Offshore pipelines USE Underwater pipelines
  70. Offshore pipelines USE Underwater pipelines
  71. Offshore platforms
  72. Offshore power plants
  73. Offshore power plants
  74. Offshore structures
  75. Offshore supply boats
  76. Offshore support vessels
  77. Offshore terminals
  78. Offshore terminals
  79. Offshore transfer
  80. Offside
  81. Offtracking
  82. Oil additives
  83. Oil booms
  84. Oil burners
  85. Oil changing
  86. Oil exploration
  87. Oil fields
  88. Oil filters
  89. Oil pollution USE Oil spills
  90. Oil pools
  91. Oil pumps
  92. Oil pumps
  93. Oil recovery equipment
  94. Oil reservoirs USE Oil pools
  95. Oil seals
  96. Oil shales
  97. Oil sorbents
  98. Oil spill cleanup
  99. Oil spill removal USE Oil spill cleanup
  100. Oil spills
  101. Oil tankers
  102. Oil water interfaces
  103. Oil well drilling
  104. Oil wells
  105. Oils
  106. Old people USE Aged
  107. Older people USE Aged
  108. Olefiant gas USE Ethylenes
  109. Olefins
  110. Olfactory perception
  111. Olympic games
  112. Omega navigation system
  113. Omnidirectional antennas
  114. On board electronics USE Vehicle electronics
  115. On dock transfer
  116. On ramps
  117. On street parking
  118. On the scene accident investigation
  119. On time performance
  120. Onboard navigation systems (Automobiles) USE Automobile navigation systems
  121. Onboard navigational aids
  122. One man operation
  123. One way streets
  124. One way traffic
  125. Online shopping USE Electronic commerce
  126. Opacity
  127. Opals
  128. OPDAR USE Optical radar
  129. Open channels
  130. Open cut excavation
  131. Open graded aggregates
  132. Open skies
  133. Open space control
  134. Open space corridors USE Greenways
  135. Open systems architecture
  136. Open top cars
  137. Open water
  138. Open water tests
  139. Open wounds
  140. Openings
  141. Operating costs
  142. Operating ratios
  143. Operating revenues
  144. Operating rules
  145. Operating speed
  146. Operating subsidies
  147. Operational calculus
  148. Operational research USE Operations research
  149. Operational tests USE Demonstration projects
  150. Operations
  151. Operations research
  152. Operators (Persons)
  153. Opportunity models
  154. Opposing traffic
  155. Optical character recognition
  156. Optical density
  157. Optical detectors
  158. Optical devices
  159. Optical fiber cables USE Optical waveguides
  160. Optical fibers
  161. Optical fibers
  162. Optical instruments
  163. Optical materials
  164. Optical measurement
  165. Optical properties
  166. Optical radar
  167. Optical rangefinders
  168. Optical scanners
  169. Optical systems
  170. Optical waveguides
  171. Optics
  172. Optimisation USE Optimization
  173. Optimization
  174. Optimization theory USE Programming (Mathematics)
  175. Optoelectronic materials
  176. Oral communication USE Voice communication
  177. Orange
  178. Ordinances
  179. Ore bulk oil carriers
  180. Ore carriers
  181. Ore terminals
  182. Ores
  183. Ores
  184. Organic chemistry
  185. Organic coatings
  186. Organic compounds
  187. Organic content
  188. Organic deposits
  189. Organic materials
  190. Organic rocks
  191. Organic salts
  192. Organic soils
  193. Organic solvents
  194. Organisations USE Organizations
  195. Organisms USE Living things
  196. Organization
  197. Organization charts
  198. Organizational effectiveness
  199. Organizations
  200. Organized crime