Workers clean up the mess after three railroad cars derailed at the north end of a CSX switching yard in Lake Township yesterday morning, closing Walbridge Road for about 13 hours. The railroad cars, two of which contained about 25,000 gallons each of diesel fuel, left the rails near the Walbridge Road crossing while they were being switched into a train about 4:45 a.m., said Kim Skorniak, a spokesman for the railroad. No cargo spilled. Railroad officials closed the nearby road while heavy equipment was brought in to put the derailed cars back on track. Walbridge Road reopened at 5:46 p.m.