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Title: INTERCHANGE VERSUS AT-GRADE INTERSECTION ON RURAL EXPRESSWAYS
Accession Number: 00637856
Record Type: Component
Availability: Find a library where document is available Abstract: The economic benefits and costs of replacing a two-way stop-controlled intersection on a rural expressway with either a signalized intersection or a conventional diamond interchange were compared. Economic benefits were based on the difference in road user costs among alternatives. Road user costs were composed of five components: delay, idle fuel, acceleration-deceleration delay, speed-change running costs, and accident costs. The benefit-cost analysis of the signalized intersection and interchange under rural expressway conditions indicated that the interchange was a more economically viable alternative than the signalized intersection. The signalized intersection's main benefit is a reduction in accidents; however, this benefit is generally negated by the signal's higher operational costs whenever the minor road demand is less than one-half that of the major road. Three geometric scenarios were formulated for the intersection and interchange. The first considered a four-leg junction with a two-lane minor road. The second considered a four-leg junction with a four-lane minor road. The third considered a three-leg junction with a two-lane minor road. Three figures were developed relating the major and minor road daily traffic demands that would economically justify an interchange in terms of a benefit-cost ratio. Whenever the major road demand is about 4,000 vehicles per day (vpd) or more, the minor road demands that provide a 2.0 benefit-cost ratio are about 4,000, 6,500, and 8,000 vpd for the three scenarios, respectively.
Supplemental Notes: This paper appears in Transportation Research Record No. 1395, Finance, Taxation, Pricing, Economic Analysis, Socioeconomics, Education, and Management. 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
Monograph Title: Finance, taxation, pricing, economic analysis, socioeconomics, education, and management Monograph Accession #: 01403230
Language: English
Authors: Bonneson, James AMcCoy, Patrick TEitel, Duane SPagination: p. 39-47
Publication Date: 1993
Serial: ISBN: 0309054656
Features: Figures
(5)
; References
(19)
TRT Terms: Uncontrolled Terms: Old TRIS Terms: Subject Areas: Economics; Finance; Highways; Society; I10: Economics and Administration
Files: TRIS, TRB, ATRI
Created Date: Oct 20 1993 12:00AM
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