Home | IL 173 at Keystone

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"At a glance" study facts

WHAT

IL 173 at Keystone Road is a transportation study being conducted in accordance with the National Environmental Policy Act (NEPA), a federal act that ensures projects consider their impacts to the natural, social and built environments.

WHERE

IL 173 runs through northern McHenry County, near the Wisconsin/Illinois border. Keystone Road intersects with IL 173 just west of Richmond, IL.

PURPOSE

The purpose of this study is to improve safety at the IL 173 at Keystone Road intersection.

WHY

Historical crash data has identified a notable pattern of crashes including severe injury crashes.

Keystone Road south of IL 173 looking south

The intersection is in unincorporated McHenry County, west of Richmond, and south of the Illinois-Wisconsin border.

IL 173 west of Keystone Road looking west

The intersection is located on level, curving sections of roadway with unobstructed sight distance in all four quadrants.

Southwest corner of the intersection looking north

There is no lighting at the intersection beyond a single luminaire mounted on a utility pole in the northeast quadrant.

Northeast corner of the intersection looking south

Advanced intersection warning signs and flashing beacons are in place on all four legs approaching the intersection.

North leg of Keystone Road looking south

The alignment of the north and south legs of Keystone Road is slightly offset.

Northwest corner of the intersection looking south

IL 173 at Keystone Road is a two-way stop controlled intersection.