Istanbul’s Sirkeci – Kazlıçeşme ‘light rail’ line opens
https://www.railwaygazette.com/suburban-and-commuter-rail/istanbuls-sirkeci-kazlceme-light-rail-line-opens/66016.article
I've boarded the section before inauguration of Marmaray tunnel. Then, trains were operated 3 or 4 services per hour.
But, at this time, 6 trains per hour are operated.
I was surprised at the improvement.
Here is the image of the timetable in Sirkeci before inauguration of Marmaray tunnel.
