The marconi curve is a section of the Capital City Freeway that curves under Marconi Avenue.  The section actually includes two curves, (a small and a big one), and incorporates some elevation change to pass freeway traffic underneath Marconi Avenue.  The section is also fairly narrow with limited shoulders, and ramps are present connecting the freeway to Marconi.  All these characteristics makes the curve fairly dangerous, and particularly prone to traffic jams during rush hour.