BISMARCK, N.D. (AP) -- The North Dakota Highway Patrol says it has issued more overload fees so far in 2012 than in all of 2011.

Troopers in 2012 have enforced 1,295 overload violations brining in $2.1 million in fees, compared to $1.9 million in 2011. The patrol says excessive vehicle weight damages roadway surfaces.

Col. James Prochniak says enforcing the overload violations keeps the roads safe and reduces repair costs.

The patrol says its weight enforcement capabilities have been enhanced throughout western North Dakota through the reallocation of existing personnel and resources.

Fourteen of the patrol's 22 motor carrier troopers are stationed in western North Dakota, where oil patch activity has increased truck traffic.