E 000 General Provisions
E 100 Introduction and General Information
- E 110 Manual References and Sources of Information
- E 120 Definitions
- E 130 Abbreviations
- E 140 Fundamentals of Real Property for Street Design Purposes
- E 150 Legal Liability and Maintenance Responsibility
E 200 General Design of Street Improvement Projects
- E 210 Street Classifications
- E 220 Financing
- E 230 Street Improvement Policies
- E 240 Calculations and Problem Solutions
E 300 Roadway Design Controls and Criteria
- E 310 Traffic Data
- E 320 Design Vehicle Physical Characteristics and Minimum Clearances
- E 330 Speed
- E 340 Highway (Street) Capacity
- E 350 Drainage Controls and Criteria
- E 360 Other Elements Affecting Geometric Design
- E 370 Terrain and Land Development
- E 380 Intersection Grades Controlled by Street Classification
E 400 General Roadway Design Elements
- E 410 Horizontal Alignment
- E 420 Vertical Alignment
- E 430 Combination of Horizontal and Vertical Alignment
- E 440 Sight Distance
E 500 Design Criteria For Special Street Components and Projects
- E 510 Alleys
- E 520 Cul-de-Sacs and Elbow Curves
- E 530 Driveways
- E 540 Grade Separations
- E 550 Intersections At-Grade
- E 580 Private Streets
- E 590 Access Ramps (formerly E 532)
E 600 Cross-Section Elements
- E 610 Streets
- E 620 Pavements
- E 630 Curbs and Gutters
- E 640 Concrete Gutters
- E 650 Borders
- E 660 Medians
- E 670 Retaining Walls and Bulkheads
- E 680 Side Slopes
- E 690 Traffic Guides and Barrier Installations
E 700 New Project Construction
- E 710 Construction Control
- E 720 Bid Document
- E 730 Changes In Documents
- E 740 Final Inspection

E 591 Design Criteria (formerly E 532.1)

Revised on 10-08-2024

The primary concern is the safety of people using the access ramp. The ramps must be designed to accommodate everyone, people who use wheelchairs, with low or no vision, with other physical disabilities, and those who are able-bodied alike.

Ramp slopes must be moderate to be usable by people who use wheelchairs without assistance. Ramps should not be provided along streets which have grades too steep for safe use by people with disabilities.

While a ramp provides no particular benefit to people with low or no vision, a uniform location and surface texture along the pedestrian access route is important for orientation and wayfinding.

At least some curb face is needed at the foot of a ramp for the blind to locate the curb line. Conversely, the curb face must be minimal to present no serious obstruction to the passage of wheelchairs.

Sufficient ramps shall be provided at a given intersection or pedestrian crossing to avoid trapping a person with disabilities with no exit other than the entrance way.