. m ., ▁one ▁following ▁another ▁in ▁the ▁dense ▁fog , ▁and ▁the ▁accum ulating ▁w reck age ▁caught ▁traffic ▁trav elling ▁in ▁the ▁opposite ▁direction . ▁Im medi ately ▁following ▁the ▁crash , ▁the ▁M TO ▁installed ▁p aved ▁shoulders ▁with ▁r umble ▁stri ps ▁and ▁fund ed ▁additional ▁police ▁to ▁pat rol ▁the ▁highway , ▁a ▁move ▁critic ized ▁as ▁being ▁ins u fficient . ▁ ▁Begin ning ▁in ▁ 2 0 0 4 , ▁ ▁of ▁the ▁highway ▁was ▁w iden ed ▁from ▁four ▁as ph alt ▁lan es ▁to ▁six ▁concrete ▁lan es , ▁p aved ▁shoulders ▁were ▁added , ▁a ▁concrete ▁Ontario ▁T all ▁Wall ▁median ▁was ▁installed , ▁which ▁was ▁the ▁solution ▁the ▁Canadian ▁Autom obile ▁Association ▁promoted ▁in ▁ 1 9 9 9 . ▁Inter changes ▁were ▁improved ▁and ▁sign age ▁was ▁upgrad ed ▁as ▁part ▁of ▁a ▁five - phase ▁project ▁to ▁improve ▁Highway   4 0 1 ▁from ▁Highway   3 ▁in ▁W inds or ▁to ▁Es sex ▁County ▁Road   4 2 ▁( former ly ▁Highway   2 ) ▁on ▁the ▁western ▁edge ▁of ▁T il bury . ▁ ▁Highway ▁of ▁Hero es ▁▁ ▁On ▁August ▁ 2 4 , ▁ 2 0 0 7 , ▁the ▁M TO ▁announced ▁the ▁stretch ▁of ▁Highway   4 0 1 ▁between ▁ ▁Miller ▁Road ▁in ▁Tr ent on ▁and ▁the ▁intersection ▁of ▁the ▁Don ▁Valley ▁Park way ▁and ▁Highway   4 0 4 ▁in ▁Toronto ▁would ▁bear ▁the ▁additional ▁name ▁Highway ▁of ▁Hero es ▁(