If you're going somewhere with your kids, it's better to travel by car than it is by train because they can be loud in the car.
この場合、次のような言い方ができますよ。
ーIf you're going somewhere with your kids, it's better to travel by car than it is by train because they can be loud in the car.
「子供とどこかに出かけるなら、電車より車で移動した方が良い。子供たちは車の中で騒げるから」
to travel by car で「車で移動する」
to be loud で「騒がしくする・うるさくする」
ご参考まで！
カナダ 
