Highest ridership per km
Metro and tram investments are huge investments. The usage depends on the population density, choosing the correct route, integration with other transport systems etc. Ridership per km is a way to understand the efficiency of rail network.
According to this, Istanbul is far ahead with over 4 mn passengers per km. The big portion of rail network is metro, thus this is not surprising.
Ankara is 2nd in this list with slight over 2 mn passenger per km. With opening of Baskentray, this is expected to increase.
The third on the list is Bursa, very close to Ankara. The important thing about this is that Bursa uses LRV system on ground which has less capacity compared to metro systems.
Efficiency (million passengers/km)
In the bottom line of the list, there’s Gaziantep with 600k passengers per km.
Next page: Biggest increase in ridership
Categories: Urban Transport
Rail Turkey En 
Thank you for all the information. I read that Adaray in Adapazarı has been suspended recently, so there the network length and usage decreased. Is it going to be reactivated? Is the suspension due to the connection to Karasu port that was listed as a project earlier (https://railturkey.org/2016/04/15/which-projects-will-not-be-commissioned-this-year/)?
You write about Gaziantep and Kayseri getting suburban railway systems. What about Balıkesir? In 2015 you wrote that the municipality wants to have it finished by 2018 (https://railturkey.org/2015/12/26/suburban-service-project-for-balikesir/). Has there been any progress made here?
The electrification around Balikesir is completed, thus a suburban train on one track may start soon. An agreement was signed between municipality and TCDD in late 2017. Stations have to be built. It may take 1-2 years. No official decleration was made until now about reason of suspension and plans for future.
How can I get from Ataturk airport to Eskisehir by railway?