Illinois State Toll Highway Authority
$70 million (I-13-4636)
$40 million (I-17-4680)
This regionally significant $3.4 billion improvement includes 17 miles of new roads with 15 new/improved interchanges as part of a new all-electronic toll road. ISTHA is rehabilitating and widening IL 390, formerly known as the Elgin O’Hare Expressway; extending it east along Thorndale Avenue to O’Hare International Airport and building a new roadway around the western border of O’Hare linking the Jane Addams Memorial Tollway (I-90) and the Tri-State Tollway (I-294).
BLA has been the prime consultant for two sections of this corridor: IL 83 to York Road (I-17-4680) and I-290 to Prospect Avenue (I-13-4636). Improvements for both sections included a total of nine bridges, mainline pavement, nine MSE walls, six ramps, two frontage roads, two toll plazas, traffic signals, drainage and lighting.