Adjective : He has a single-track mind.    From Dictionary.com. 

A single-track railway line ran alongside the river.    From Wordnik.com.  [My Bones Will Keep]

It was a single-track leading into a disused quarry.    From Wordnik.com.  [Boiling a Frog]

It had not been going very fast on the single-track road.    From Wordnik.com.  [My Bones Will Keep]

Now I'm off to Big Bone Lick for some sweet single-track.    From Wordnik.com.  [Hands On: The Latest In Grips] Reference

"You've sure got a single-track mind, boy," Strawn chuckled.    From Wordnik.com.  [Murder at Bridge] Reference

This will be a three and one-half day, single-track symposium.    From Wordnik.com.  [Taco Bell Syndicate Issue #1 by Shredder] Reference

As for my having a single-track mind, Captain, what about you?.    From Wordnik.com.  [Murder at Bridge] Reference

‘Ay, you’ll not want to travel a single-track road in the dark.    From Wordnik.com.  [My Bones Will Keep]

Trains will single-track from 7 a.m. to 7 p.m. Saturday and Sunday.    From Wordnik.com.  [Ex-Marine convicted in abduction and rape] Reference

The single-track road wound back toward the very base of the hills.    From Wordnik.com.  [A Share in Death] Reference

Trains will single-track between the two stations through Saturday closing.    From Wordnik.com.  [Ex-Marine convicted in abduction and rape] Reference

(Godforbid you end up on the Metro when they have to single-track.) charles Says.    From Wordnik.com.  [Matthew Yglesias » Doubts About a Vehicle-Miles Traveled Tax] Reference

Only a narrow corridor, a single-track railway line, connects Berlin with the West.    From Wordnik.com.  [Daring Young Men] Reference

It is a single-track road with half-mile sidings at intervals of about seven miles.    From Wordnik.com.  [The History of the American Expedition Fighting the Bolsheviki Campaigning in North Russia 1918-1919] Reference

It was a normal two-way road instead of the single-track ones we had been moving on.    From Wordnik.com.  [Bravo-Two-Zero]

Then they followed the single-track line away from the yard and up towards the tunnel.    From Wordnik.com.  [Five Go Off To Camp]

To feed his habit, Slater built single-track trails and introduced biking to the town.    From Wordnik.com.  [Margie Goldsmith: Mountain Biking in Kilts in New Brunswick, Canada] Reference

There has been practically no internal strife, because the Munanese has a single-track mind.    From Wordnik.com.  ["The Golden Girl of Munan" by Harl Vincent, part 6] Reference

If GTA is really as good as they're saying, don't be too mad at me if I go single-track mind.    From Wordnik.com.  [Archive 2008-04-01] Reference

We may then see trains running in opposite directions pass each other on a single-track road.    From Wordnik.com.  [Modern Eloquence: Vol III, After-Dinner Speeches P-Z] Reference

The extent of the electrification thus required was found to be about 100 single-track miles.    From Wordnik.com.  [Transactions of the American Society of Civil Engineers, Vol. LXVIII, Sept. 1910 The New York Tunnel Extension of the Pennsylvania Railroad. Paper No. 1150] Reference

Next up the New York Post reports that single-track music download sales have slowed this year.    From Wordnik.com.  [Video: Diller Steps Down From Live Nation, Google Helps India With Census] Reference

The line I'm on, Bradford, is a single-track line with only one siding at York University stop.    From Wordnik.com.  [go] Reference

Most of the time, this is a single-track, i.e., I sing/play and it goes into the program together.    From Wordnik.com.  [Archive 2009-04-01] Reference

I experience a similar type of creativity when Im running down a single-track trail at high speed.    From Wordnik.com.  [ChiRunning] Reference

But of course Call himself had such a single-track mind that he scarcely realized he was doing it.    From Wordnik.com.  [Lonesome Dove] Reference

The South Korean official Monday said that North Korea took advantage of the single-track approach.    From Wordnik.com.  [S. Korea Looks for Sincere Gesture from North] Reference

Taking a shortcut along a single-track lane, Jason remembered a game one July when he and Dave had batted in partnership.    From Wordnik.com.  [Ellery Queen Mystery Magazine]

New media has rebooted to more efficient methods of obtaining information, not unlike vinyl albums ceding to single-track downloads.    From Wordnik.com.  [E-Books May Be the Future of Reading, Ready or Not] Reference

To get there he may launch an Internet radio station that will whet listeners 'appetites for album and single-track purchases online.    From Wordnik.com.  [Billionaire Lives Out Folk Music Fantasy] Reference

The 10K will lap the park's rolling single-track trails.    From Wordnik.com.  [The Roanoke Times: Home page] Reference

Trains continue to single-track through the area, causing minor delays.    From Wordnik.com.  [The Washington Times stories: Latest Headlines] Reference

This single-track Loop can extend south or north leg via Westlake/SPU separately.    From Wordnik.com.  [Crosscut] Reference

You should see the latest single-track circulator monorail design I've amended from the Blue Line.    From Wordnik.com.  [Crosscut] Reference