Or at least involuntary isolation:

When the cash toll at the Verrazano-Narrows Bridge rose from $9 to $10 last March, many Staten Island drivers thought they had seen it all.

But the sticker shock of the sawbuck pales in comparison to a toll hike as high as — get this — $14.

That’s how much the round-trip toll could conceivably cost as part of the MTA’s proposed package of fare and toll hikes.

The authority outlined a variety of options yesterday meant to achieve a projected revenue increase of up to 23 percent, to plug a $1.2 billion budget gap.

Nothing is set in stone; rather, the proposed changes, including a $6.25 express bus fare, a $2.50 or $3 local bus or subway fare and severe service cuts, reflect the outside threshold of pain.

Of the $14 toll threat, MTA spokesman Jeremy Soffin said, “Is it a possibility? It’s there, but it’s in the upper range. I don’t know where we’ll be in the end.”