More than 80 inches of snow has fallen at Michigan International Speedway this year. And with just a week to go before NASCAR's fastest track opens its gates for a Goodyear Tire Test, it was time to call in the big guns to melt ice and snow from the track. MIS maintenance crews used old-fashioned know-how Monday, enlisting the help of jet dryers to melt snow drifts and sheets of ice on some areas of racing surface. The jet dryer was first used in the early-70s to melt snow at Michigan International Speedway. It evolved to eventually be the primary means NASCAR used to dry racetracks after rain-delays. Today, jet dryers have been replaced by NASCAR's innovative Air Titan technology.