They...
They travel by car.
She...
She travels by train.
They...
They travel by van.
She...
She travels by bike / bicycle.
They...
They travel by space shuttle.
They...
They travel by bus.
They...
They travel by ferry.
They...
They travel by hot air balloon.
He...
He travels by canoe.
He...
He travels by scooter.
He...
He travels by motorbike / motorcycle.