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 310 Traffic Data

Generally, the street project engineer requires traffic data which should include present volumes for the days of the year and times of the day. Also, there should be traffic trends stated from which an estimate may be made of future volumes. This data helps the designer plan the type of (highway)¹ street.

The distribution of vehicles by types and by weights determines the traffic load, which is expressed as the traffic index (T.I.). This determines the required structural section, lane widths, turning radii, etc., for the street. The flow pattern and diagrams aid in determining the geometrics of intersections, median strips, channelization, access control, traffic controls, etc. The analysis of (accident)¹ collision data and volume is used in establishing economic justifications for budgeting purposes and priority of project construction for the correction of hazardous traffic conditions. (These calculations are generally done by the Coordinating Division of the Bureau of Engineering.)¹ These calculations are generally done by the Department of Transportation.

Footnote

The text in parenthesis is from the legacy Street Design Manual text and has been superseded by the italicized text that follows.