Complex sentence: Early on, the railroad focused on increasing freight capacity by using larger locomotives and cars, as well as strengthening bridges to handle these larger loads, but by 1905 the railroad was looking to further increase capacity and decrease travel times.
Split into simpler sentences: Early on, the railroad focused on increasing freight capacity by using larger locomotives and cars, as well as strengthening bridges to handle these larger loads. But by 1905 the railroad was looking to further increase capacity and decrease travel times.