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Dirt track racing is the single most common form of auto racing in the United States. According to the National Speedway Directory, there are over 700 dirt oval tracks in operation in the US. [1] The composition of the dirt on tracks has an effect on the amount of grip available. Many tracks use clay with a specific mixture of dirt.
Figure 8 World Championship Racing .60 miles (0.97 km) Flat cross Little Valley Speedway: Little Valley: New York: 1932–2011(figure 8 track) Clay .28 miles (0.45 km) Flat cross Manzanita Speedway: Phoenix: Arizona: 1951–2010 Asphalt .70 miles (1.13 km) Bridge cross Riverhead Raceway: Riverhead: New York: 1951 Asphalt Figure 8 World ...
Road America is a motorsport road course located near Elkhart Lake, Wisconsin on Wisconsin Highway 67.It has hosted races since the 1950s and currently hosts races in the IndyCar Series, IMSA SportsCar Championship, Sports Car Club of America GT World Challenge America and Trans-Am Series and the MotoAmerica Superbike Championship.
NASA World Wind overlays satellite, aerial and topographic maps of the United States; Google Earth: a visual 3D interactive atlas. Atlas World: a directory of atlases currently in print. List of official state road maps of the United States; Scanned official transportation maps online; Links to all state Departments of Transportation
Backbone State Park: Iowa 3 / Iowa 13 near Strawberry Point: 1927: 1957 Renumbered Iowa 410 No. 20: 324 [3] 521 Illinois state line at Keokuk: Minnesota state line near Burr Oak: 1920: 1926 Replaced by US 61 and US 55 Iowa 21: 115: 185 Minnesota state line near Allendorf: Iowa 141 near Denison: 1920: 1934
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A map of the United States showing its 50 states, federal district and five inhabited territories. Alaska, Hawaii, and the territories are shown at different scales, and the Aleutian Islands and the uninhabited northwestern Hawaiian Islands are omitted from the map.
In 1930, the Iowa State Highway Commission spent $64 million (equivalent to $929 million in 2023 dollars [14]) across the state on road works projects. On the back of the 1931 state highway map, the commission declared that Iowa was no longer a mud road state. [8]