Des Moines grew up where the Raccoon River joins the Des Moines River, and the two rivers still divide the city into distinct sides. I-235 runs straight through the middle, linking downtown with West Des Moines on one end and the east side on the other. I-35 and I-80 share a long stretch around the north and west edges of the metro, splitting at interchanges known locally as the mixmasters, and US 65 forms a beltway on the east side toward Altoona and Pleasant Hill.
Inside the city, Fleur Drive runs south from downtown past Gray's Lake to the airport, Martin Luther King Jr. Parkway curves through the west side, and Euclid Avenue, Hickman Road and University Avenue carry most east-west traffic. I-235 is the city's busiest road and backs up near downtown at rush hour, and the mixmaster interchanges are where commuters from Ankeny, Waukee and West Des Moines feel it most. The older neighborhoods north of downtown have alleys and detached garages, which make on-site work easy even on narrow lots.
Downtown is threaded with an enclosed skywalk system, so plenty of workers park in a ramp and barely step outside in winter, which makes a dead car on an upper ramp level a common request. Des Moines International Airport sits just south of downtown off Fleur Drive. DART buses cover the main corridors, but the metro is spread out, and most households rely on their cars for nearly everything.