92 Ill. Adm. Code 550.60
Noncommercial Driveway Requirements (Illustrations C and D)
Section 550
Section 550.60 Noncommercial
Driveway Requirements (Illustrations C and D)
a) Width of Drive. All noncommercial driveways shall have a
width between the minimum of 12 feet and the maximum of 24 feet. This width
shall be measured at right angles to the center line of the driveway. The
width may be increased by permissible radii to allow for smooth ingress and
egress at the highway connection. Where a driveway is to be used by large farm
equipment, a width of 20 feet should be considered. Although such arrangements
are discouraged, permits may be issued for common residential entrances to
serve adjacent properties. These entrances shall be centered on the property
line and shall not exceed the 24-foot maximum width. The permit will be issued
jointly to the two owners and must be executed by both owners.
b) Radius of Flare. The flare used to connect the driveway to
the roadway shall normally fall entirely within the right-of-way. The radii
for noncommercial entrances should be between 10 and 30 feet in rural areas and
5 to 15 feet in urban areas. In cases where the right-of-way is narrow,
traffic volumes are large, or speeds are high, radii outside these ranges may
be permitted to allow for efficient use of the driveway.
c) Angular Placement. The driveway center line should generally
be at a right angle to the pavement edge and follow this angle from the roadway
to the right-of-way line or, in rural areas, to a distance of 40 feet from the
edge of pavement, whichever is less. If the size and shape of the property are
such that the driveway must be at an angle to the pavement, this angle should
be parallel to the property line. However, no driveway shall be placed that
will have a center line angle measured from the roadway less than 45 degrees in
urban locations or less than 60 degrees in rural locations.
d) Location. No part of a driveway, including the flare, should
encroach on the frontage of the adjacent property. Where the driveway services
a corner property, a minimum distance shall be maintained to the public road
intersecting the highway. This distance shall be measured parallel to the edge
of pavement or curb of the highway from the edge of the intersecting road to
the beginning of the driveway flare. For rural locations, this distance shall
be a minimum of 50 feet, and for urban locations, this distance shall be
sufficient to allow a 5-foot section of undisturbed curb length. In both rural
and urban areas, no part of the driveway, including the flare, may be closer
than 5 feet to the extension of the near right-of-way line of the intersecting
road.