Litterbugs apparently have learned a lesson from years of the iconic "Don't mess with Texas" campaign to keep roadways clean.
The Texas Department of Transportation on Wednesday credited the anti-litter campaign with helping to reduce visible highway trash by more than a third since 2009.
The 2013 Texas litter survey involved TxDOT-maintained roads. The leading visible roadside litter has been tire and rubber debris, followed by miscellaneous paper, plastic and beverage containers. The agency found visible trash was reduced by 34 percent for the reporting period.
Agency executive director Phil Wilson says he's extremely pleased that drivers are properly disposing of litter.
TxDOT started the "Don't mess with Texas" campaign in 1986. The agency last year spent $47 million on picking up trash.