The highway was expanded to a divided highway between Marlow Heights and Silver Hill in the early 1970s, around its interchange with Interstate 95 (I-95) and I-495 in the early 1980s, and around MD 210 in Oxon Hill in the late 1980s. MD 414 was reconstructed around MD 210 again in the mid-2000s with the construction of National Harbor and the new Woodrow Wilson Bridge.
The highway underwent expansions, widening to a divided highway between Marlow Heights and Silver Hill in the early 1970s, around its interchange with I-95 and I-495 in the early 1980s, and around MD 210 in Oxon Hill in the late 1980s.  MD 414 was rebuilt near MD 210 again in the mid-2000s with the construction of National Harbor and the new Woodrow Wilson Bridge.