Illinois Accessability Code
Effective April 24, 1997

The following is excerpted from;
71 ILLINOIS ADMINISTRATIVE CODE      CH. 1. §400.310

c)     Parking and Passenger Loading Zones

      1)     Minimum Number. If any parking is provided for employees or visitors, or both, the minimum number of accessible parking spaces to be provided for environmentally limited persons is as follows:


TOTAL OFF STREET PARKING SPACES PROVIDED
1 to 25
26 to 50
51 to 75
76 to 100
101 to 150
151 to 200
201 to 300
301 to 400
401 to 500
501-1000
Over 1000
 REQUIRED MINIMUM NUMBER OF ACCESSIBLE SPACES
1
2
3
4
5
6
7
8
9
2% of total number
20 plus for each 100 over 1000

(Table from ADAAG 4.1.2(5)(a))


      2)     Location. Accessible parking spaces serving a particular building shall be located on the shortest accessible route of travel from adjacent parking to an accessible entrance. In parking facilities that do not serve a particular building, accessible parking shall be located on the shortest accessible route of travel to an accessible pedestrian entrance of the parking facility. In buildings with multiple accessible entrances with adjacent parking, accessible parking spaces shall be dispersed and located closest to the accessible entrances. The total number of accessible parking spaces may be distributed among parking lots, if greater accessibility is achieved in consideration of such factors a anticipated usage, number and location of entrances and level of parking areas. (ADAAG 4.6.2)


      3)      Dimensions and Markings. Each parking space, except on-street spaces, shall consist of a sixteen foot wide parking space including an eight foot wide diagonalty striped access aisle. Adjacent parking spaces shall not share a common access aisle (see Illustration B, Fig. 9(a)). In the alternative, all required parking spaces may be provided in conformance with "Universal Parking Design" (ADAAG Appendix A4.6.3), except that such spaces shall not utilize a shared access aisle with an adjacent space (ADAAG 4.1.2(5)(b) Exception.). Under Universal Parking Design, all accessible spaces are sixteen feet wide, including a space eleven feet (132 in., 3350 mm) wide with a five foot (60 in., 1525 mm) diagonally striped access aisle (see Illustration B, Fig. 9(b)). A high quality yellow paint recommended by the paint manufacturer for pavement striping shall be used. Each parking space shall have its own access aisle and all access aisles shall blend to a common level with an accessible route. Parking spaces and access aisles shall be level with surface slopes not exceeding 1:50 (2%) in all directions. (ADAAG 4.6.3) Minimum vertical clearance of 98 in. (2490 mm) at the parking space and along at least one vehicle access route to such spaces from site entiance(s) and exit(s) shall be provided. (ADAAG 4.6.5)


      4)      Attendant-Only or Valet Parking. No accessible parking shall be required if attendant-only or valet parking is provided and is available at all times the facility is open for public use. However, such parting facilities shall provide a passenger loading zone complying with subsection (c)(5) of this Section located on an accessible route to the entrance of the facility. (ADAAG 4.1.2(5)(e)) If'accessible at-grade parking is available, at least one space for self-parking of a vehicle with sensitive specialized control devices shall beprovided.


      5)      Passenger Loading Zones. Passenger loading zones shall provide an access aisle at least 60 in. (1525 mm) wide and 20 ft. (240 in.) (6100 mm) long adjacent and parallel to the vehicle pull-up space (see Illustration B, Fig. 10). If there are curbs between the access aisle and the vehicle pull-up


      6)      Medical Facilities. At facilities providing medical care and other services for persons with mobility impairments, parking spaces shall be provided in accordance with subsection (c) of this Section except as follows:

A)      Outpatient units and facilities: 10% of the total number of parking spaces provided serving each such outpatient unit or facility shall be designated as accessible spaces;

B)      Units and facilities that specialize in treatment or services for persons with mobility impairments: 20% of the total number of parking spaces provided serving each such unit or facility shall be designated as accessible spaces. (ADAAG 4.1.2(5)(d)(i) and (ii))


      7)      Signage. Accessible parking spaces shall be designated as reserved for environmentally limited persons by providing a R7-8 (U.S. Department of Transportation standard) sign which contains the international symbol of accessibility (see Illustrations C and D). Such signs shall exhibit the words "$100 Fine" (or higher amount if required by local ordinance). (See Illinois Vehicle Code [625 ILCS 5/11-301 and 301.1].) Signs shall be vertically mounted on apost or wall at front center of the parking space, no more than 5 feet horizontally from the front of the parting space and set a minimum of 4 feet from finished grade to the bottom of the sign. Such signs shall be located so they cannot be obscured by a vehicle parked in the space. (ADAAG 4.6.4)


d)     Curb Ramps

      1)     Location. Curb ramps shall be provided wherever an accessible i crosses a curb (ADAAG 4.7.1) and shall comply -with the following:



      2)     Slope. Slopes of curb ramps shall comply with subsection (e)(2) o) Section. The slope shall be measured as shown in Illustration B, Fig Transitions from ramps to walks, gutters, or streets shall be flush and of abrupt changes. Maximum slopes of adjoining gutters, road surface immediately adjacent to the curb ramp, or accessible route shall not exceed 1:20. (ADAAG 4.7.2)


      3)     Width. The minimum width of a curb ramp shall be 36 in. (915 mm), exclusive of flared sides. (ADAAG 4.7.3)


      4)     Surface. Surfaces of curb ramps shall comply with subsections (a)(5), (7), (II) and (12) of this Section. (ADAAG 4.7.4)


      5)     Sides of Curb Ramps. If a curb ramp is located where pedestrians must walk across the ramp, or where it is not protected by handrails or guardrails, it shall have flared sides; the maximum slope of the flare shall be 1:10 (see Illustration B, Fig. 12(a)). Curb ramps with returned curbs may be used where pedestrians would not normally walk across the ramp (see Illustration B, Fig. 12(b)). (ADAAG 4.7.5)


      6)     Built-up Curb Ramps. Built-up Curb Ramps. Built-up curb ramps shall be located so that they do not project into vehicular traffic lanes (see Illustration B, Fig. 13). (ADAAG 4.7.6)


      7)     Detectable Warnings. A curb ramp shall have a detectable warning feature extending the full width and depth of the curb ramp, including any flares. (ADAAG 4.7.7) Such detectable warning features shall consist of exposed aggregate concrete or parallel or diamond mesh pattern grooves, cushioned surfaces made of rubber or plastic, or raised strips (see Illustration B, Fig. 40). Textures shall contrast with that of the surrounding surface. Textured sur faces for detectable warnings shall be standard within a site.


      8)     Obstructions. Curb ramps shall be located or protected to prevent their obstruction by parked vehicles. (ADAAG 4.7.8)


      9)     Location at Marked Crossings. Curb ramps at marked crossings shall be wholly contained within the markings, excluding any flared sides (see Illustration B, Fig. 15). (ADAAG 4.7.9)