ServiceMaster Clean Yellow Flag Caution Period to Debut at Daytona 500
MEMPHIS, Tenn., Feb. 11 /PRNewswire/ -- ServiceMaster Clean, the first-ever official sponsor of the caution period during races at International Speedway Corporation (ISC) and Speedway Motorsports Incorporated (SMI) race tracks, will make its official debut this Sunday at the 51st annual Daytona 500. When there is a problem on the track, the ServiceMaster Clean Yellow Flag will wave, and the company's familiar yellow trucks will be dispatched to clean the track. (Logo: http://www.newscom.com/cgi-bin/prnh/20080830/SRVCMSTRLOGO ) In racing, a yellow flag means time to clean up the track.