According to Yeni Safak, a newspaper competent in Turkey news, one tunnel with a length of 5.87 kilometers has been completed to connect between the Kasımpaşa, Sütlüce, and Çamlıca; the tunnel reached the final stages of construction and there will be many other tunnels planned to connect the mentioned areas
There are also 22 tunnels in the European part of Istanbul and six tunnels in the Asian part of the city. And it is planned until 2019 to complete 17 tunnels with a total length of up to 98 kilometers. For example, the tunnel will start from Kağıthane to Bayrampaşa down to Bagjlar.
The tunnel that is between Dolmabahçe and Lavazem will run through Cendara road from Ayazağa to Garipçe which means that it will serve communications between Beşiktaş and Sariyer to help easing transportation.
There will be a 52-km-long tunnel to connect between Büyükçekmece and Kağıthane going through 6 districts, connecting them.
A tunnel which goes from Kağıthane will connect Bayrampaşa with Küçükçekmece going through Bagjlar ending in Büyükçekmece coming from Avcılar.
Another tunnel project with a length of 47 kilometers will go through Davutpaşa, Samatya, Merter, Kazlıçeşme, Kadıköy, and Kosdaly.
By 2023, there will be new tunnels under Istanbul to ease congestion and transporting crisis. For instance a 145- kilometer tunnel is planned to combines all the tunnels made before 2019 and after it.
A tunnel with a length of 24 kilometers will be constructed to ease congestion of Coast Oscudar Also. This project will serve Harem, Beylerbeyi, Çengelköy, Küçüksu, and Kavacık where the demarcation lines between these areas are separately defined.