▁T win ▁C ities ▁incorpor ated ▁existing ▁roads , ▁both ▁p aved ▁and ▁un p aved . ▁A ▁new ▁section ▁of ▁highway , ▁between ▁M N ▁ 5 ▁( now ▁I - 4 9 4 ▁and ▁M N ▁ 5 ) ▁in ▁Ed ina ▁and ▁then - US ▁ 5 2 ▁( now ▁CR ▁ 8 1 ) ▁in ▁Rob b ins dale ▁was ▁needed ▁to ▁complete ▁the ▁bel t way . ▁As ▁such , ▁it ▁was ▁planned ▁as ▁a ▁state - of - the - art ▁highway , ▁with ▁two ▁lan es ▁in ▁each ▁direction ▁separated ▁by ▁wide ▁med ians , ▁brid ges ▁at ▁major ▁inter sections ▁and ▁rail road ▁cross ings , ▁and ▁the ▁first ▁clo ver leaf ▁inter changes ▁in ▁Minnesota . ▁ ▁Carl ▁Gra es er , ▁the ▁highway ▁engineer ▁and ▁Arthur ▁R . ▁Nich ols , ▁a ▁landscape ▁architect , ▁te amed ▁up ▁to ▁design ▁the ▁highway . ▁A ▁large ▁number ▁of ▁W PA ▁workers ▁worked ▁on ▁the ▁construction ▁of ▁the ▁highway . ▁Since ▁the ▁W PA ▁was ▁designed ▁to ▁keep ▁a ▁large ▁number ▁of ▁workers ▁busy , ▁a ▁lot ▁of ▁hand ▁dig ging ▁was ▁done ▁as ▁opposed ▁to ▁using ▁bul ld oz ers . ▁ ▁Clo ver leaf ▁inter changes ▁were ▁built ▁at ▁M N ▁ 7 , ▁US ▁ 1 2 ▁( now ▁I - 3 9 4 ▁and ▁US ▁ 1 2 ) ▁and ▁M N ▁ 5 5 ▁( O l son ▁Highway ). ▁ ▁The ▁land sc aping ▁of ▁the ▁highway ▁was ▁meant