00227798

Component

http://onlinepubs.trb.org...rbbulletin/253/253-001.pdf

A TECHNIQUE HAS BEEN DEVELOPED FOR ESTIMATING EFFICIENT SPACINGS FOR ARTERIALS AND EXPRESSWAYS, WHICH PROVIDES A RATIONAL BASIS FOR PREPARING INITIAL SKETCH PLANS THAT CAN BE TESTED ON A COMPUTER. THIS METHOD INVOLVED POSING A NUMBER OF CRITERIA RELATED TO LAND PLANNING, TRANSPORTATION PLANNING, AND ECONOMIC CONSIDERATIONS. THE TECHNIQUE EMPLOYED WAS TO MINIMIZE THE SUM OF TWO COSTS- TRAVEL AND CONSTRUCTION COSTS- BOTH UNDER TRANSPORTATION PLANNING. USING A SIMPLIFIED NETWORK ( A GRID ) OF LOCAL AND ARTERIAL STREETS AND EXPRESSWAYS, THE CONSTRUCTION AND TRAVEL COSTS COULD BE STATED MATHEMATICALLY AS FUNCTIONS OF (1) SPACING, (2) TRIP DESTINATION DENSITIES, (3) TRIP LENGTH FREQUENCY DISTRIBUTION, (4) UNIT CONSTRUCTION COSTS, (5) RELATIVE SPEEDS, AND (6) VALUE OF PERSONAL TIME. THIS MATHEMATICAL STATEMENT COULD THEN BE MINIMIZED BY MEANS OF THE DIFFERENTIAL CALCULUS. MINIMUM SPACINGS CAN ALSO BE ESTIMATED USING GRAPHICAL MEANS, FOR A SLIGHTLY MORE SIMPLIFIED STATEMENT OF TOTAL COSTS. RESULTS APPEAR TO BE REASONABLE.

No 253, pp 1 - 43, 21 FIG, 15 TAB, 1 REF, 2 APP Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.

01410642

English

43p

1960

Highway Research Board Bulletin

Digital/other

Arterial highways; Cartographic grids; Computer programming; Construction; Costs; Differential equations; Economic factors; Expressways; Graphics; Grids (Transmission lines); Highway planning; Land use planning; Network analyzers; Spacing; Streets; Transportation planning; Travel

Construction costs; Graphical analysis

Construction; Economics; Finance; Highways; Operations and Traffic Management

TRIS, TRB

Aug 15 2004 2:36AM

• A THEORETICAL PREDICTION OF WORK-TRIP PATTERNS
• APPRAISAL OF SAMPLE SIZE BASED ON PHOENIX O-D SURVEY DATA
• CRITIQUE OF HOME-INTERVIEW TYPE O-D SURVEYS IN URBAN AREAS
• GENERATION OF PERSON TRIPS BY AREAS WITHIN THE CENTRAL BUSINESS DISTRICT
• INTERPRETATION OF DESIRE LINE CHARTS MADE ON A CARTOGRAPHATRON
• LAND USE FORECASTING FOR TRANSPORTATION PLANNING
• MULTIPLE SCREENLINE STUDY TO DETERMINE STATEWIDE TRAFFIC PATTERNS
• NEW YORK PORT AUTHORITY'S 1958 O-D SURVEY USING CONTINUOUS SAMPLING
• PANEL DISCUSSION ON INTER-AREA TRAVEL FORMULAS
• TESTS OF INTERACTANCE FORMULAS DERIVED FROM O-D DATA
• THE CONTINUING TRAFFIC STUDY: METHODS OF KEEPING O-D DATA UP-TO-DATE