ride the blind
to ride between the cars of a moving freight or passenger train to avoid being spotted by the train's crew or police
So's they don't know I'm here hopping this freight, I'd better ride the blind. C'mon. Don't be afraid!
ride the blind
To ride in the empty boxcar of the train typically used for freight instead of passengers. Used frequently in lyrics of the blues music genre.
I was a hobo and had to ride the blind to get from Memphis to Chicago.