ay ▁portion ▁was ▁completed ▁( or ▁even ▁begun ). ▁ ▁Similarly , ▁the ▁inter changes ▁at ▁I - 2 0 , ▁I - 3 0 , ▁and ▁SH ▁ 1 8 3 ▁were ▁in ▁place ▁long ▁before ▁the ▁fre ew ay ▁lan es ▁were ▁completed . ▁▁▁ ▁The ▁indirect ▁inter change ▁between ▁SH ▁ 3 6 0 ▁and ▁I - 3 0 ▁is ▁a ▁re lic ▁back ▁from ▁when ▁I - 3 0 ▁existed ▁as ▁the ▁Dallas / F ort ▁W orth ▁Turn pi ke . ▁In ▁order ▁to ▁direct ▁traffic ▁through ▁to ll ▁bo oth s , ▁the ▁inter change ▁was ▁designed ▁so ▁that ▁any ▁traffic ▁moving ▁from ▁between ▁the ▁fre ew ays ▁were ▁rout ed ▁through ▁one ▁common , ▁bi - direction al ▁r amp . ▁This ▁was ▁done ▁as ▁a ▁cost - s aving ▁measure , ▁as ▁it ▁required ▁fewer ▁to ll ▁bo oth s . ▁The ▁to ll ▁bo oth s ▁were ▁removed ▁in ▁ 1 9 7 7 , ▁but ▁the ▁complex ▁access ▁road ▁system ▁remained . ▁ ▁South ▁of ▁SH ▁ 1 8 3 , ▁SH ▁ 3 6 0 ▁was ▁previously ▁known ▁as ▁Watson ▁Road . ▁ ▁The ▁segment ▁through ▁Ar ling ton ▁is ▁also ▁officially ▁designated ▁as ▁the ▁" Ang us ▁G . ▁W yn ne ▁Fre ew ay " ▁( after ▁the ▁founder ▁of ▁Six ▁Fl ags ); ▁however , ▁neither ▁the ▁official ▁design ation ▁nor ▁the ▁older ▁Watson ▁Road ▁name ▁are ▁locally ▁used , ▁and ▁the ▁road ▁is ▁generally ▁called ▁" 3 6