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 541 Warrants For Grade Separation

Revised on 09-24-2024

In justifying the use of a grade separation, consideration is given to the type and volume of traffic, topography, available right of way, number of accidents, and economic costs. Due to the high cost, the City has limited its use of grade separations to the intersections of railroads with major and secondary highways. As basic guides for determining the need for railway grade separations, one or both of the following criteria may be used:

When the average daily traffic times the number of trains equals 80,000 with at least 8 trains per day.
When there has been one accident per year during each of the last five years in which a train and a motor vehicle have been involved.

The final judgment as to the need of a railway grade separation should consider the characteristics of the terrain, the existing surrounding improvements, and economic feasibility. Since the funds available are limited and there is a need and justification for these structures throughout the City, a priority list for the construction of these projects has been established. This list is subject to change, as are the existing traffic conditions and fund availability.