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.
In the bottom line of the list, there’s Gaziantep with 600k passengers per km.