Dispatch calls about debris on roads in Salt Lake County, Jan. 1 through July 19, 2007:

• 4,814 calls

• 280 crashes involving debris

• 203 "attempts to locate" on vehicles spilling gravel

• 63 "attempts to locate" on a person who was littering

Cleanup efforts by UDOT:

• $1.8 million average cost each year

• 3,000 dump truck loads annually

• 99,600 trash bags used in 2006

Sources: Utah Department of Transportation, Utah Highway Patrol