Steel
It has 3 trains and they are all painted yellow.
If that's a typo and you mean GEARed trains, then Trains work best on level ground - they don't do well climbing hills - because the friction of steel on steel is low. Geared trains ar not limited by friction.
They are made out of steel and hydrolicks
Railroad Tracksrails
Steel.
Steel , Brass, Bronze, Copper,
Because it was a strong metal.
Railway tracks made of usually steel or iron
Same materials as most railway trains: mainly steel, though modern ones may make more use of aluminium and plastics. Plus other materials such as the copper in the motors and cabling.
No! Trains use diesel fuel. Or electricity.
why commuters don't used the trains