What is that "thing-a-ma-bob"?

In the pictue on page 23 of Classic trains Special “Streamliner Pioneers”, there is an assembly of cut down ties laid between ads parallel to the rails, on the empty track, with an outriggerish looking assembly of longer ties, off to one side (right beside the lead power unit of the passing train)

What purpose does this serve?

That was a place where a handcar or speeder could be taken off the track to let a train go by. No need for steel rails–just ties at the proper gauge. I remember seeing those things along the GTW between Grand Haven and Grand Rapids; in the 30 or so miles there were probably four or more.

Ahhh, I see… Thanks!

If I look closely, I can see the gouges cut into the pad by what was no doubt the wheel flanges of the handcars, as they came off the wooden “rails” from the side.

The same type of setup was used for speeder sheds.