"a long bumpy ride" is correct and usable in written English.
It is an idiom and is used to express the idea that something will be difficult or a struggle. An example sentence could be: We have a long and bumpy road ahead of us to reach our goal.
But when it comes to turning a major work of literature into theater, audiences can be in for a long, bumpy ride.
Her hair was not white but platinum blond, a color that to me certified a hard heart, immoral dealings, and a long bumpy ride through the sordid back alleys of life.
Then again, after a long, bumpy ride from the jungle-lush interior of Belize to the country's sun-blanched coast, the last person you want to meet is a chap in a stiff suit with a name badge pinned to his lapel.
Like zombies in the dusk, grim-faced guests on the summer social circuit arrived at his driveway at 9 p.m. to be shuttled in golf carts, a long, bumpy ride that felt very Hansel and Gretel, with escape not an easy option.
On one early trip he joined a Cuban friend on a long, bumpy ride to the Santa Clara region to taste a new kind of cigar.
With this kind of muddled thinking by our "very serious" establishment, we're in for a long, bumpy ride.
On Tuesday, the race in which pundits long-ago declared Hillary Clinton the presumptive victor will begin in earnest; sit tight, it's going to be a very long, bumpy ride.
We went through Glendorn on a very beautiful, long, bumpy ride to Letterkenny hospital".
I was on the tail end of a nasty cold and didn't want to make it worse with a long bumpy bus ride.
From the Osa peninsula, it's a short but terrifying flight in a 12-seater plane to the capital city, San José, followed by a hectic taxi and a long, bumpy bus ride to get to the Caribbean.
A long, bumpy car ride filled with traffic can make you terribly sick.
