before being split into two sections on either side of fort wayne, sr 1 traveled on a continuous route through that city. from the present northern terminus of its southern section at interstate 469's exit 6 in south-central allen county, it continued north on bluffton road to pass just east of fort wayne's main airport (then known as baer field). in the waynedale district of southwestern fort wayne, sr 3 joined bluffton road from the southwest at lower huntington road. from there the routes originally continued together northward, hugging the bank of the st. mary's river before curving east to bridge it. sr 1/sr 3 then immediately turned right (south) onto broadway for about before turning east on rudisill boulevard. from there the routes continued to a one way pair of clinton street (southbound) and lafayette street (northbound), which then carried a concurrency of us 27 from decatur and us 33 from st. marys, ohio. at lima road, sr 3 continues north, as us 27 and sr 1 got on i-69 northbound until exiting at dupont road.