Victor came at a dead run as they emerged from the service tunnel.

The service tunnel merged with another and made a slow bend toward the main line.

I'll be here in the service tunnel, and Security is watching all the corridors.

We went at a fast trot to the open mouth of the service tunnel.

After a few more yards, they came to what looked like a service tunnel.

The service tunnels are three to five feet wide.

Now, if they are in one of the service tunnels they'd have to figure a way to get water through there, down to your main line.

Her hiding place proved to be a service tunnel of some kind.

After a couple Standards of walking bent against the wind, she came to a service tunnel.

A service tunnel, much larger than it looked from the outside.