tunnel tunnel 0.1374 island island 0.0497 strait strait 0.0497 economic econom 0.0497 bridge bridg 0.0497 MAINLAND mainland 0.0497 SAKHALIN sakhalin 0.0497 LINKS link 0.0081 transport transport 0.0081 finalising fin 0.0081 building build 0.0081 studies stud 0.0081