TUNNEL, tonnel anglisi tunel), inshooti zerizamini e khud zeriobiest baroi harakati naqliyot, digar kardani masiri ob, guzaronidani kommunikasiyaho va gayra. Andozai tunnel ba tainoti on va sharoithoi topografi, geologi, iqlimii mahal vobasta ast. Nakhustin tunneli kishtigard (taqriban 160 m) dar Fransiya (okhiri asri 17) va avvalin tunneli rohi okhiri (taqriban 1190 m) dar Britaniyai Kabir (1826—30) sokhta shuda bud.
Dar Tojikiston bo maqsadi obyori namudani zaminhoi bekorkhobidai dashti Dangara tunneli Dangara (daroziash taqriban 13500 m) ba istifoda doda shud (1986), ki yake az kalontarin tunnelhoi mamlakat ba hisob meravad. Sokhtmoni tunneli naqliyotii Anzob sar shudaast. I. Tohirov