Monorail [noun]

Standing up, he stretched and touched the top of the monorail car.

He was pointing into the distance and expounding on the merits of the monorail system.

But though a jet was faster than the monorail it was also more expensive.

But Tom kept listening to the subdued click of the monorail—and kept wondering.

"I followed you from the monorail station," replied the boy.

To start the early Wright biplanes, the machines were placed on a monorail, along which they were towed by a cable.

For years, Mr. Brennan tells me, the problem haunted him, of how to make a monorail car balance itself.

Roads, monorail lines, all the countless tracks of civilization had disappeared beneath the green tide.

He tossed and turned and worried and finally—comfortable as the monorail car was—he fell asleep from sheer exhaustion.

A small cubicle jutted out from the ship and lowered itself along a monorail running down to the ground.