Illinois Administrative Code › Title 92 - TRANSPORTATION › Part 550 - POLICY ON PERMITS FOR ACCESS DRIVEWAYS TO STATE HIGHWAYS › Section 550.70 - Commercial Driveway Requirements (Illustrations E and F)

Current through Register Vol. 48, No. 28, July 12, 2024
a) Width of Drive. All commercial driveways
			 shall be limited to a maximum width of 35 feet measured at right angles to the
			 center line of the drive, exclusive of flares. The width may be increased by
			 permissible radii to allow for smooth ingress and egress at the highway
			 connection. The maximum permissible width for rural locations shall be 60 feet
			 measured along a line 6 feet from and parallel to the roadway edge. For urban
			 locations, the maximum width shall be 85 feet measured at the face of the
			 curb.
b) Radius of Flare. The flare
			 used to connect the driveway to the roadway shall normally fall entirely within
			 the right-of-way. It may be permitted to go outside the right-of-way if raised
			 curbing extends into the private property. In rural locations, the radii shall
			 be between 10 and 40 feet, while in urban cases they shall be between 10 and 25
			 feet. In special cases, after consideration of the right-of-way width, proposed
			 volumes, types of vehicles, speeds on the roadway, and parking regulations,
			 radii outside these ranges may be permitted to allow for the efficient use of
			 the driveway. The geometrics necessary for smooth operation of the driveway may
			 require the use of modified radii flares or three-center curves with or without
			 island.
c) Angular Placement. The
			 center line of a single driveway that services a commercial property should
			 generally be at a right angle to the roadway or parallel to the property line.
			 The angle of the center line with the roadway may be reduced to 60 degrees for
			 two-way driveways or 45 degrees for multiple entrances where the driveways will
			 be used for one-way traffic. Angled driveways may be allowed for high-speed
			 roadways and/or large volume movements.
d) Location.
1) Sufficient distance must be maintained
			 between the property line and the edge of the driveway to allow for the
			 construction of an adequate island between drives should the adjacent property
			 owner desire to build an entrance. In rural locations, this distance shall be
			 measured along a line 6 feet from and parallel to the roadway edge and should
			 be a minimum of 5 feet. In urban situations, a curb length of not less than 3
			 feet shall be left undisturbed adjacent to each property line.
2) All commercial driveways shall be located
			 to provide a specified minimum distance from the intersecting public roads.
			 This distance shall be measured along a line parallel to but not greater than 5
			 feet from the pavement edge. For rural locations, the minimum distance between
			 the beginning of the flare and the edge of the intersecting road shall be 50
			 feet. At urban locations, the beginning of the flare must be at least 5 feet
			 from the extension of the near right-of-way line of the intersecting road. In
			 no case shall the distance between the point at which the edge of the driveway
			 intersects the pavement edge and the line of the through traffic lane extended
			 be greater than 5 feet. Where a separate right-turn lane is provided, no part
			 of the lane taper shall encroach on the highway flare.