HARRISBURG – PennDOT is highlighting efforts to clean up and cut down on littering in the state. PennDOT crews have expanded their routine litter pickup operations now through Labor Day. Cleanups are occurring on higher-traffic roads where volunteer groups cannot safely pick up litter. Motorists are reminded to slow down, drive with caution, be alert for stopped or slow-moving vehicles, and watch for workers near the roadway, along interchanges and entrance/exit ramps. PennDOT spends about $14 million annually on statewide litter efforts. The department also unveiled new anti-littering messages that will appear on its electronic message signs statewide through September 2. Cigarette butts were among the most common items found in the estimated 500 million pieces of litter on PA roads. Littering is 100% preventable with fines beginning at $300.