▁the ▁G TA . ▁The ▁first ▁set ▁is ▁ ▁long ▁and ▁connect s ▁Highway   4 0 3 , ▁Highway   4 1 0 ▁and ▁Highway   4 2 7 . ▁This ▁system ▁primarily ▁serves ▁to ▁accommod ate ▁and ▁organ ize ▁various ▁traffic ▁movements ▁from ▁the ▁Highway   4 0 3 ▁/ ▁ 4 1 0 ▁and ▁Highway   4 2 7 ▁inter changes ▁along ▁Highway   4 0 1 , ▁replacing ▁an ▁earlier ▁plan ▁that ▁would ▁have ▁run ▁Highway   4 0 3 ▁directly ▁to ▁E gl inton ▁Avenue ▁and ▁the ▁never - built ▁Rich view ▁Express way . ▁East ▁of ▁the ▁inter change ▁with ▁Ren for th ▁Drive , ▁the ▁collect or ▁lan es ▁diver ge ▁to ▁become ▁the ▁on - ram ps ▁to ▁Highway ▁ 4 2 7 ▁north bound ▁and ▁south bound . ▁The ▁second ▁ ▁system ▁passes ▁through ▁the ▁centre ▁of ▁Toronto ▁and ▁ends ▁in ▁Pick ering ▁to ▁the ▁east . ▁The ▁ ▁gap ▁between ▁the ▁two ▁systems ▁is ▁a ▁traffic ▁bott l ene ck . ▁However , ▁the ▁inter change ▁cannot ▁accommod ate ▁future ▁w iden ing ▁of ▁Highway   4 0 1 . ▁ ▁Highway   4 0 1 ▁wid ens ▁to ▁ 1 8   lan es ▁south ▁of ▁Toronto ▁Pear son ▁International ▁Airport . ▁Progress ing ▁east ward , ▁eight ▁lan es ▁are ▁carried ▁beneath ▁the ▁large ▁sp agh etti ▁j unction ▁at ▁Highway   4 2 7 . ▁The ▁highway ▁curves ▁n ortheast ▁and ▁follows ▁a ▁power ▁transmission ▁cor rid or ▁to ▁Highway