Transportation Research Thesaurus (TRT)

  1. Nacelles
  2. Nails
  3. Nanostructure materials
  4. Naphtha
  5. Narcolepsy
  6. Narcotics
  7. Narrow body aircraft
  8. Narrow bridges
  9. Narrow gage track
  10. National defense
  11. National government USE Federal government
  12. National heritage USE Cultural resources
  13. National parks
  14. National security
  15. Nationalisation USE Nationalization
  16. Nationality of ships USE Registry
  17. Nationalization
  18. Native Americans
  19. Native peoples USE Indigenous peoples
  20. Native plants
  21. Natural aggregates
  22. Natural earth crust materials
  23. Natural frequency
  24. Natural gas
  25. Natural gas
  26. Natural gas buses
  27. Natural gas distribution systems
  28. Natural gas pipelines
  29. Natural resins
  30. Natural resources
  31. Natural rock asphalt USE Asphalt rock
  32. Natural rubber
  33. Nautical astronomy USE Celestial navigation
  34. Nautical charts
  35. Navaids USE Navigational aids
  36. Naval aircraft
  37. Naval architecture
  38. Naval shore facilities
  39. Naval vessels USE Military vessels
  40. Navigation
  41. Navigation (Aeronautics) USE Aircraft pilotage
  42. Navigation aids USE Navigational aids
  43. Navigation charts
  44. Navigation computers
  45. Navigation devices
  46. Navigation lights
  47. Navigation processes
  48. Navigation radar
  49. Navigation receivers USE Radar receivers
  50. Navigation simulators USE Ship simulators
  51. Navigation system using time and ranging USE NAVSTAR
  52. Navigation systems
  53. Navigational aids
  54. Navigational aids by reference to craft
  55. Navigational aids specific to a craft or vehicle
  56. Navigational computers USE Navigation computers
  57. Navigational satellites
  58. Navigators (Aircraft) USE Air navigators
  59. Navigators (Shipboard personnel) USE Ship navigators
  60. NAVSTAR
  61. Navy personnel
  62. NDTs USE Nondestructive tests
  63. Near field
  64. Near midair collisions
  65. Near misses USE Near midair collisions
  66. Nearside
  67. Nearside (Bus stops)
  68. Neck
  69. Neck motion range
  70. Needs assessment
  71. Negative skin friction
  72. Negligence
  73. Neighborhoods
  74. Neoprene
  75. Nerves
  76. Nervous system
  77. Nervous system diseases
  78. Network analysis (Planning)
  79. Network analyzers
  80. Network equilibrium USE Equilibrium (Systems)
  81. Networks
  82. Neural networks
  83. Neurology
  84. Neutral stress USE Pore pressure
  85. Neutralization
  86. Neutron activation analysis
  87. Neutrons
  88. New products
  89. New towns
  90. News
  91. Newspapers
  92. Newton's equations of motion
  93. Newton's law of gravitation
  94. Newton's laws of motion USE Newton's equations of motion
  95. NGV powered buses USE Natural gas buses
  96. Nickel
  97. Nickel alloys
  98. Nickel batteries
  99. Nickel cadmium batteries
  100. Nickel iron batteries
  101. Nickel zinc batteries
  102. Nicotine
  103. Night
  104. Night shifts
  105. Night visibility
  106. Night vision
  107. Night vision devices
  108. Nighttime accidents
  109. Nitrates
  110. Nitric acid
  111. Nitric oxide
  112. Nitrites
  113. Nitrogen
  114. Nitrogen compounds
  115. Nitrogen dioxide
  116. Nitrogen inorganic compounds
  117. Nitrogen oxides
  118. NMR USE Nuclear magnetic resonance
  119. No build
  120. No fault insurance
  121. No frills carriers USE Low cost carriers
  122. No parking
  123. No passing zones
  124. Noble gases
  125. Nodes (Networks)
  126. Noise
  127. Noise (Communications)
  128. Noise abatement USE Noise control
  129. Noise barriers
  130. Noise control
  131. Noise generators
  132. Noise meters USE Sound level meters
  133. Noise parameters USE Sound level
  134. Noise pollution USE Noise
  135. Noise propagation USE Sound transmission
  136. Noise sources
  137. Noise transmission USE Sound transmission
  138. Nomographs
  139. Nonattainment areas
  140. Noncohesive soils USE Granular soils
  141. Nondestructive testing USE Nondestructive tests
  142. Nondestructive tests
  143. Nonflammable materials
  144. Nonlinear differential equations
  145. Nonlinear equations
  146. Nonlinear programming
  147. Nonlinear systems
  148. Nonmetals
  149. Nonmotorized transportation
  150. Nonnewtonian flow
  151. Nonparametric analysis
  152. Nonprofit corporations
  153. Nonrecurrent congestion
  154. Nonshattering glass
  155. Nontransportation industries
  156. Nonuniform flow
  157. Nonuser benefits
  158. Nonwoven materials
  159. Nonwoven textiles
  160. Normal distributions
  161. Northern hemisphere
  162. Nose
  163. Notch tests
  164. Notching (Cutting)
  165. Notebook computers USE Laptop computers
  166. Novices
  167. Nozzles
  168. Nuclear density gages
  169. Nuclear density gages
  170. Nuclear energy
  171. Nuclear engineering
  172. Nuclear excavation
  173. Nuclear explosions
  174. Nuclear fission USE Fission
  175. Nuclear fuel elements USE Fuel elements
  176. Nuclear fuels
  177. Nuclear fusion USE Fusion
  178. Nuclear gages
  179. Nuclear magnetic resonance
  180. Nuclear materials USE Radioactive materials
  181. Nuclear meters USE Nuclear gages
  182. Nuclear moisture density determinations USE Nuclear tests
  183. Nuclear moisture gages
  184. Nuclear moisture gages
  185. Nuclear phenomena
  186. Nuclear physics
  187. Nuclear power
  188. Nuclear power generation
  189. Nuclear power plants
  190. Nuclear powered icebreakers
  191. Nuclear powered ships
  192. Nuclear probes
  193. Nuclear probes
  194. Nuclear radiation
  195. Nuclear reactions
  196. Nuclear reactor components
  197. Nuclear reactor coolants
  198. Nuclear reactor cores
  199. Nuclear reactor wastes USE Spent reactor fuels
  200. Nuclear reactors