To travel by bus.

乘公共汽车旅行。

youdao

To travel by bus is easy, cheap and convenient, though not so fast as travelling by plane or so comfortable as by train.

乘公共汽车旅行虽然没有乘飞机那么快，也没有乘火车那么舒适，但是很容易，也很便宜方便。

youdao

It'll work out cheaper to travel by bus.

算来还是乘公共汽车便宜些。

《牛津词典》

If you travel by bus in Sao Paulo,Brazil these days your vehicle may be powered by hydrogen fuel cells.

VOA: special.2009.09.07

Many of the villages take days to reach, often requiring travel by bus, helicopter and boat.

CNN: STORY HIGHLIGHTS

The strike affected about 150, 000 students who travel by bus to public, private and parochial schools, both in the city and in the surrounding suburbs.

WSJ: School Bus Strike Ends

The suspension of Amtrak train service forced the New England Revolution to change plans and travel by bus Friday morning to their game against the New York Red Bulls scheduled Saturday night at Red Bull Stadium in Harrison, N.

NPR: Red Sox, Bruins Postpone Games During Manhunt