Integrative Levels Classification project ILC2 schedules developing schedules how it works people references
ILC class st2

ILC developing version
Expanded class st2

   ▲  broader class

▽ ⌕         st2            by transport infrastructure ; utility  [heavy civil engineering; hydraulic engineering]  ≈ DDC 625
▽ ⌕         st2g                 storage; warehouses
▽ ⌕         st2h                 harbour
▽ ⌕         st2n                 canal  ≈ DDC 627
▽ ⌕         st2p                 bridge  ≈ DDC 624
▽ ⌕         st2pv                      viaduct
▽ ⌕         st2r                 road  ≈ DDC 625
▽ ⌕         st2s                 railroad; railway; track  ≈ DDC 625
▽ ⌕         st2t                 tunnel; gallery; underground opening  ≈ DDC 625
▽ ⌕         st2x                 airport
▽ ⌕         st2y                 space station; orbital station
 
Connected classes:
 
 wgwb                road bicycle racing  ↞ st2r 

specificity 
current: 99 

   
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