St. Louis sits on the west bank of the Mississippi, and its interstates all converge on the riverfront and the Arch. I-64, still known as Highway 40 to nearly everyone, runs west from downtown past Forest Park, Clayton and the central county toward Chesterfield. I-44 heads southwest toward Kirkwood and Rolla, and I-55 runs south toward Arnold. I-70 heads northwest past the airport toward St. Charles and crosses the river into Illinois on the Stan Musial Bridge, while I-55 and I-64 cross on the Poplar Street Bridge. I-270 forms the outer loop through north, west and south county, and I-170 cuts north-south through the inner suburbs.
The Poplar Street Bridge, the downtown interchanges and the stretch of 40 through the central corridor are the usual slow spots, and I-270 backs up at nearly every major interchange during rush hour. Breakdowns pile up there and on the river bridges, which leave little room to stop. The city itself is dense, with brick homes on narrow streets and alleys behind most blocks, so a mechanic can often reach a car from the alley as easily as from the front.
St. Louis Lambert International Airport sits northwest of the city in the county, and its long-term lots and garages see plenty of dead batteries. MetroLink light rail runs from the airport through the city, past Forest Park and Washington University and across the river into Illinois, so some people ride in while their car is repaired at home.
Forest Park, larger than many big-city parks back east, sits between the central neighborhoods and the inner suburbs, and the roads around it carry heavy traffic on weekends and during events at the zoo and museums.