Project Background, Process, and Understanding
Fabyan Parkway, bordered by the communities of Geneva and Batavia, crosses the Fox River between IL 31 and IL 25. Through the Fabyan Parkway intersection, IL 31 is on a horizontal curve that is slightly superelevated. While the west leg of Fabyan Parkway is nearly perpendicular to IL 31, the east leg is angled at approximately 68°. This severe skew creates an uncomfortable maneuver for through and turning traffic on Fabyan Parkway.
At the intersections of IL 31 at Fabyan Parkway and IL 25 and Fabyan Parkway there are two through lanes in each direction and single left-turn lanes on all four legs. There are no right-turn lanes despite the heavy traffic volumes, which is a contributing factor to the congestion at the intersections. The Fabyan Parkway Trail crosses the south leg of IL 31 and connects to the Fox River trail within the Fabyan Forest Preserve. Sidewalk exists along the west side of IL 31 north and south of the intersection, though there is no crosswalk on the west leg. At the intersection with IL 25, there is an existing trail in the north parkway of the Forest Preserve property but no pedestrian accommodations within the intersection. There are currently no pedestrian accommodations on the bridge crossing the Fox River connecting both of these intersections.
The existing traffic signals have video detection and protected, plus permitted, left-turn lanes which provides for an exclusive phase for left-turns and a permissive phase during which left-turns can be made if gaps in opposing through traffic allow. There is pan-tilt-zoom (PTZ) cameras on the combination mast arms in the southwest corners that allows KDOT to review high quality real time video and still images over the internet of the intersections. There is intersection lighting in all four corners, which is separated from the bridge lighting system to the east.
The west end of the bridge carrying Fabyan Parkway over the Fox River is only about 400’ from the westbound stop bar at IL 31 and approximately 700’ from the eastbound stop bar at IL 25.
Fabyan Forest Preserve
The Fabyan Forest Preserve, which is under the jurisdiction of the Kane County Forest Preserve District (KCFPD) lies between IL 31 and the Fox River. Adjacent to Fabyan Parkway, the forest preserve is mostly densely wooded riverbank. The Fabyan Parkway Trail connects to the Fox River Trail on the south side of Fabyan Parkway, within the Forest Preserve. The Fox River trail parallels the river and crosses Fabyan Parkway underneath the bridge, adjacent to the west abutment.
Campana Property
The Campana building and property in the northwest quadrant is listed on the National Register of Historic Places and has seen proposals for redevelopment.
Holmstad Property
The Holmstad property in the southwest quadrant is a large retirement community that features regular, assisted living, and memory care units.
Terminology Defined
Video Detection: Video cameras mounted to the traffic signal post that utilize a grid type system to detect the presence of vehicles which triggers a change in the signal phase.
Combination Mast Arm: Traffic signal posts at an intersection that have both a cantilevered arm with signals heads on it and an arm with roadway lighting.
