Last year the New York State DOT started using these tandem trailer-plows on the interstates. The trailer swings out and plows the adjacent lane. Not certain of the manufacturer, but it's more than a little daunting passing (or being passed by) one of these units. They sure work, though.
![[Image: Trailer%20Plows_zpsewdptjhc.jpg]](http://i5.photobucket.com/albums/y179/fyreline/Trailer%20Plows_zpsewdptjhc.jpg)
![[Image: Trailer%20Plow%202_zpskt7bnlmm.jpg]](http://i5.photobucket.com/albums/y179/fyreline/Trailer%20Plow%202_zpskt7bnlmm.jpg)
![[Image: Trailer%20Plows_zpsewdptjhc.jpg]](http://i5.photobucket.com/albums/y179/fyreline/Trailer%20Plows_zpsewdptjhc.jpg)
![[Image: Trailer%20Plow%202_zpskt7bnlmm.jpg]](http://i5.photobucket.com/albums/y179/fyreline/Trailer%20Plow%202_zpskt7bnlmm.jpg)