An Evaluation of the Speed Limit Setting Procedure and Tool for Utah
Publication: International Conference on Transportation and Development 2023
ABSTRACT
In 2021, the Speed Limit Setting Procedure (SLS-Procedure) and Speed Limit Setting Tool (SLS-Tool) were developed as part of the National Cooperative Highway Research Program (NCHRP) Project 17-76. The SLS-Procedure and SLS-Tool emphasize the importance of context sensitivity during the speed limit suggestion process. To evaluate the potential for implementation on Utah roads, the research team analyzed 29 locations that were divided into 66 uniform segments that could be individually analyzed with the SLS-Tool. Then, the suggested speed limits that resulted from the SLS-Tool were compared to the recommendations from the Utah Department of Transportation (UDOT) speed studies. The tool suggested using the 50th percentile speed in 54% of segments due to various roadway conditions resulting in a lower speed limit for 23% of segments. This resource can aid an analyst in complying with state guidelines on when to depart from the standard 85th percentile speed requirement.
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REFERENCES
FHWA (Federal Highway Administration). (2009). Manual on Uniform Traffic Control Devices. United States Department of Transportation, Washington, DC.
Fitzpatrick, K., Carlson, P., Brewer, M., Wooldridge, M., and Miaou, S. (2003). “Design Speed, Operating Speed, and Posted Speed Practices,”.
Fitzpatrick, K., Das, S., Pratt, M. P., Dixon, K., and Gates, T. (2021a). “Development of a Posted Speed Limit Setting Procedure and Tool.” National Academies Press. National Academies of Sciences. Engineering, and Medicine.
Fitzpatrick, K., Das, S., Pratt, M. P., Dixon, K., and Gates, T. (2021b). “Posted Speed Limit Setting Procedure and Tool: User Guide.” National Academies Press. National Academies of Sciences. Engineering, and Medicine.
Fitzpatrick, K., McCourt, R., and Das, S. (2019). “Current Attitudes Among Transportation Professionals with Respect to The Setting of Posted Speed Limits.” Transportation Research Record Vol. 2673(4) pp. 778–788.
Forbes, G. J., Gardner, T., McGee, H., and Srinivasan R. (2012). “Methods and Practices for Setting Speed Limits: An Information Report,” United States Department of Transportation Federal Highway Administration.
NTSB (National Transportation Safety Board). (2017). “Reducing Speeding-Related Crashes Involving Passenger Vehicles.” National Transportation Safety Board.
Shill, G. H., and Bronin, S. C. (2021). Rewriting Our Nation’s Deadly Traffic Manual, Harvard Law Review.
Solomon, D. (1964). Accidents on Main Rural Highways Related to Speed, Driver, and Vehicle. United States Department of Commerce/Bureau of Public Roads and Government Publishing Office.
Stamatiadis, N., Kirk, A., Hartman, D., Jasper, J., Wright, S., King, M., and Chellman, R. (2018). “An Expanded Functional Classification System for Highways and Streets.” National Academies Press. National Academies of Sciences. Engineering, and Medicine 2018.
State of Utah. (2022). “Utah Code,” Utah State Legislature. Title 41, Chapter 6a. <https://le.utah.gov/xcode/Title41/Chapter6A/41-6a.html?v=C41-6a_1800010118000101>(May 11, 2022).
TRB (Transportation Research Board). (1998). “Managing Speed: Review of Current Practice for Setting and Enforcing Speed Limits,” Transportation Research Board of the National Research Council and National Academy Press.
UDOT (Utah Department of Transportation). (2021). “Speed Management Info Sheets,” <https://maps.udot.utah.gov/wadocuments/Data/Region4/SR_258_and_SR_118_Corridor_Study/Speed%20Management%20Info%20Sheets_2021_06_24.pdf>(May 11, 2022).
UDOT (Utah Department of Transportation). (2022). “UDOT Policy and Procedure Book,” <https://sites.google.com/utah.gov/udot-document-repository/policies>(May 4, 2022).
Information & Authors
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Published In
International Conference on Transportation and Development 2023
Pages: 138 - 150
History
Published online: Jun 13, 2023
ASCE Technical Topics:
- Comparative studies
- Construction engineering
- Construction management
- Engineering fundamentals
- Highway and road conditions
- Highway and road management
- Highway transportation
- Highways and roads
- Infrastructure
- Methodology (by type)
- Project management
- Research methods (by type)
- Transportation engineering
- Transportation management
- Transportation studies
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