H . ▁ ▁The ▁Lincoln ▁Service ▁between ▁Chicago ▁and ▁St . ▁Louis ▁has ▁been ▁upgrad ed ▁and ▁has ▁trains ▁running ▁at ▁ 9 0 ▁MP H ▁( f aster ▁than ▁the ▁prior ▁ 7 9 ▁MP H ▁limit ). ▁ ▁Service ▁at ▁spe eds ▁of ▁ 1 1 0 ▁MP H ▁and ▁higher ▁is ▁sl ated ▁to ▁being ▁in ▁ 2 0 1 9 . ▁ ▁There ▁has ▁also ▁been ▁some ▁talk ▁of ▁service ▁from ▁Chicago ▁O ' H are ▁International ▁Airport ▁to ▁Rock ford ▁railway ▁station . ▁Studies ▁began ▁in ▁ 2 0 1 5 ▁to ▁look ▁into ▁the ▁construction ▁and ▁contract ing ▁on ▁the ▁project . ▁ ▁References ▁ ▁External ▁links ▁▁ ▁ID OT ▁Illinois ▁High ▁Speed ▁Rail ▁ ▁Category : High - speed ▁railway ▁lines ▁in ▁the ▁United ▁States ▁Category : Pro posed ▁railway ▁lines ▁in ▁Illinois ▁Category : R ail ▁transport ation ▁in ▁Illinois <0x0A> </s> ▁He ve a ▁rig id ifolia ▁is ▁a ▁species ▁of ▁rub ber ▁tree ▁in ▁the ▁genus ▁He ve a , ▁belonging ▁to ▁the ▁family ▁Eu ph orb ia ceae . ▁It ▁is ▁native ▁to ▁the ▁rain for ests ▁of ▁northern ▁Brazil ▁and ▁Colombia , ▁where ▁it ▁is ▁en demic ▁to ▁local ities ▁near ▁the ▁upper ▁Rio ▁Neg ro , ▁a ▁north ▁bank ▁trib ut ary ▁of ▁the ▁Amazon ▁River , ▁and ▁its ▁trib ut ary , ▁the ▁V au p és ▁River . ▁ ▁Description ▁H . ▁rig id ifolia ▁is ▁a ▁small ▁tree ▁reaching ▁about ▁ ▁in ▁height . ▁Ann ual ▁growth