No, It does not mean trams have expensive running cost than trains. Trams with in-city branch lines (not inter-city) would huge losses if running cost of trams are increased (especially hard difficulty)
And private car should not be problem when you use train extensively for inter-city transportation. You even could destroy country roads to prevent private cars, but good ‘train’ lines even make only few private cars on the streets
Also note that you can achieve over 95% usage with trains (no inter-city trams) too. by choosing right vehicle. commuter EMUs(or DMUs) are best for adjacent cities. Ae 4/7 and Re 4/4 are also good before commuter trains are coming out. faster, heavier trains are better for longer lines (A from C or D or E in A – B – C – D – E Scheme)
