RR Crossing

Clackety-clack
Along the track,
The cars go rolling by.
The engine's force,
The fixed rail-course
Are fates they can't deny.

They roll. They rock.
The routes they block
Are never their own fault,
Nor any ill
From crash to spill
To long unscheduled halt.

The engineer
Has duties clear,
The track a path defined.
Passengers -- they
Have got no say,
And make no never-mind.