Uzunköpru (Edirne province)  - Ünye (Ordu)

Dear Marionin, I wonder how you managed to find the one starting and ending with "U", huh??   Little cheating accepted (ü instead of u)??

It is "Uzunköprü"

Yes, a county of Edirne Province and means "Long Bridge".

Ünye ( ORDU ) - Eynesil ( GİRESUN )

 Ordu-urfa

ŞanlıUrfa - Şişli ( İSTANBUL )

 Şarköy ( TEKİRDAĞ )

Şarköy ( TEKİRDAĞ ) - Yenipazar ( AYDIN )

Yenipazar ( AYDIN )- Yeşilyurt (MUĞLA)

Yeşilyurt (MUĞLA) - Tarsus (MERSIN)

Tarsus ( MERSİN ) - Mazıdağı ( MARDİN )

 Muratlı (Tekirdağ Province: where the railway being built from the harbour at Tekirdağ will connect with the line from Edirne to İstanbul)

Muratlı ( TEKİRDAĞ ) - Malkara ( TEKİRDAĞ )

The railway starting from Muratlı will also connect industrial counties Çorlu and Çerkezköy to the harbour of Tekirdağ. But in my opinion, they should first develop this harbour, it is not as big as to hold all the transportation of Trakya industry.